| 单词 | pappus |
| 例句 | Turning to the car to leave, I see the white globe of a dandelion pappus float past the driver’s window and gently land by the front wheel. Tending to Grass, and to Grief, on a Tennis Court in Iowa 2022-09-05T04:00:00Z He called his soldiers pappi, and many soon felt comfortable enough around him to call him the same. U.S. Soldier Whose Death in Afghanistan Upended Peace Talks ‘Loved His Country’ 2019-09-09T04:00:00Z This tuft, called a pappus, is made up of a sparse thicket of filaments, or bristles, that look something like the sprouting hair on the head of the Chinese crested dog. Drifting Dandelion Seeds Produce a Vortex Never Before Seen 2018-10-23T04:00:00Z The parachute is a bunch of bristles called a pappus. Revealed: the extraordinary flight of the dandelion 2018-10-16T04:00:00Z Resembling Chrysopsis, but the achenes of the ray thicker than those of the disk and without pappus or nearly so. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Fertile heads.—With filiform corollas, mixed with a dense white silky pappus, which soon elongates. The Wild Flowers of California: Their Names, Haunts, and Habits 2012-02-17T03:00:37.163Z The narrowed upper part of the ovary has become much elongated and the pappus is spread out like an inverted umbrella. Through a Microscope Something of the Science Together with many Curious Observations Indoor and Out and Directions for a Home-made Microscope. 2011-12-29T03:00:20.733Z The pappus seemed to be acting like a balloon or a parachute, keeping the seed from succumbing to gravity. Drifting Dandelion Seeds Produce a Vortex Never Before Seen 2018-10-23T04:00:00Z This vortex travels above the pappus and yet is not attached to it, an invisible yet faithful familiar that generates lift and prolongs the seed’s descent. Revealed: the extraordinary flight of the dandelion 2018-10-16T04:00:00Z Achenes small; pappus a short crown or none.—Mostly strong-scented; leaves alternate. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z The long white pappus of the female plant renders it a conspicuous object in autumn. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5 "Greek Law" to "Ground-Squirrel" 2011-12-05T03:00:51.527Z The limb of the calyx may appear as a rim, as in some Umbelliferae; or as pappus, in Compositae and Valeriana. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" 2011-04-03T02:00:20.883Z That happens because of the way air currents interact as they flow among the filaments of the pappus. Drifting Dandelion Seeds Produce a Vortex Never Before Seen 2018-10-23T04:00:00Z The key lies not in the bristles of the pappus, but in the spaces between them. Revealed: the extraordinary flight of the dandelion 2018-10-16T04:00:00Z Achenes short, turbinate to linear; pappus simple, of numerous unequal bristles.—Mostly herbaceous perennials, with alternate rigid leaves. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Of the Dandelion, its pappus raised on a long beak. The Elements of Botany For Beginners and For Schools The lupines, of which there are many ill-defined species, are now mostly out of flower, and many of the compositæ are beginning to fade, their radiant corollas vanishing in fluffy pappus like stars in mist. My First Summer in the Sierra Those currents help keep the whole seed structure afloat by increasing the drag on the falling pappus. Drifting Dandelion Seeds Produce a Vortex Never Before Seen 2018-10-23T04:00:00Z But it takes a rare combination of size, mass, shape and, crucially, porosity for the pappus to generate this vortex ring. Revealed: the extraordinary flight of the dandelion 2018-10-16T04:00:00Z In Compositæ and some others, the calyx is mostly reduced to a pappus, or a mere border, or even to nothing more than a covering of the surface of the ovary. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Barbellate, said of the bristles of the pappus of some Composit� when beset with short, stiff hairs, longer than when denticulate, but shorter than when plumose. The Elements of Botany For Beginners and For Schools It appears at the base of the corolla, at the summit of the inferior ovary, and is known as pappus. The Plants of Michigan Simple Keys for the Identification of the Native Seed Plants of the State Dr. Cummins said the filaments make the pappus four times as efficient at staying afloat as a simple flat disc. Drifting Dandelion Seeds Produce a Vortex Never Before Seen 2018-10-23T04:00:00Z Size is also particularly important, because from the point of view of something as small as a pappus, the air is appreciably viscous. Revealed: the extraordinary flight of the dandelion 2018-10-16T04:00:00Z Achenes ribbed; pappus of capillary bristles, in the sterile plant scanty and tortuous; in the fertile very long and copious.—Shrubs, commonly smooth and resinous or glutinous. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Many are very light, and have winged appendages, pappus, or down, which enable them to be carried enormous distances. Island Life Or the Phenomena and Causes of Insular Faunas and Floras The structure of the pappus is best observed in the ripe fruit. The Plants of Michigan Simple Keys for the Identification of the Native Seed Plants of the State The vortex also contributes to the support of the pappus, because it forms a low-pressure area so that air rises. Drifting Dandelion Seeds Produce a Vortex Never Before Seen 2018-10-23T04:00:00Z In Bidens the pappus consists of two or more stiff-barbed bristles which cause the fruit to cling to the coats of animals. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 7 "Columbus" to "Condottiere" Achenes grooved; pappus capillary, in a single row.—Herbs, somewhat glandular, emitting a strong or camphoric odor, the heads cymosely clustered. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z The flowers are succeeded by the fruits, which bear a soft snow-white woolly pappus. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" Leaves simple, deciduous; heads of flowers small, many-flowered; receptacle naked; pappus of hairs. Trees of the Northern United States Their Study, Description and Determination The group tested their ideas with simplified artificial models, etched silicon discs that were porous like the bristly pappus. Drifting Dandelion Seeds Produce a Vortex Never Before Seen 2018-10-23T04:00:00Z Jussieu, A. de, structure of the pappus in Carthamus, ii. The Variation of Animals and Plants Under Domestication, Volume II (of 2) Achenes obovate, not winged nor notched at the apex, and without pappus, deciduous with the subtending scale and 2 or 3 of the inner chaff.—Alternate-leaved perennials of the southern and southwestern States; head pedunculate. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z If she blew every one of the pappus off at one breath, he loved her; if she didn't, he didn't love her. The Love Story of Abner Stone Seed 1, quadrangular, with simple, downy, sessile pappus. The Medicinal Plants of the Philippines Linné has remarked that the ovary of Tragopogon sometimes assumes very large dimensions, as also does the pappus. Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants Pappose: downy: made up or clothed with pappus. Explanation of Terms Used in Entomology Achenes very thick and obovoid, flat at the top; pappus none.—Erect perennial herbs, with opposite coarsely toothed leaves, their sessile bases sometimes connate, and large single heads of pale yellow flowers, on terminal peduncles. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Sometimes all the pappus disappeared, and sometimes they didn't, and so she never reached a decided conclusion. The Love Story of Abner Stone One seed crowned with a simple hairy pappus. The Medicinal Plants of the Philippines Under natural, i.e. habitual circumstances, the formation of pappus in place of a leafy calyx may be considered as an illustration of degeneration. Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants The pappus is raised on a long stalk, × 1. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Style-tips truncate or nearly so; outer involucre small and short; rays rose-color or yellow with brown base; pappus an obscure border or none. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Then gray-haired pappus, downy, soft, Follows with pistils loose, And the gosling of the early spring Becomes a white-fledged goose. Our Profession and Other Poems Each plant is named "Senecio" because of the grey woolly pappus of its seeds, which resemble the silvered hair of old age. Herbal Simples Approved for Modern Uses of Cure It was composed externally chiefly of moss, intermingled with dried leaves and fibres; the egg-cavity was warmly and thickly lined with a felt of pappus. The Nests and Eggs of Indian Birds, Volume 1 This plant appears to be generically distinct from Erigeron, particularly in its stipitate pappus. Expedition into Central Australia Achenes terete or ribbed, glabrous, truncate; pappus none or a minute crown.—Branching strong-scented herbs, with finely pinnately dissected leaves and solitary terminal heads; rays white; disk yellow. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Particularly beautiful is its silvery seed-ball, the pappus consisting of about a dozen hairlike bristles inside a ring of small oblong scales, on which the seed sails away. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors The Goldfinch often lines her nest with the soft pappus of the Coltsfoot. Herbal Simples Approved for Modern Uses of Cure JUSSIEU, A. de, structure of the pappus in Carthamus. The Variation of Animals and Plants under Domestication — Volume 2 I do not think that I made enough about the great power of absorption of water by the corolla-like calyx or pappus. More Letters of Charles Darwin — Volume 2 Annual, acrid; rays mostly neutral; receptacle without chaff near the margin; pappus none; leaves finely 3-pinnately dissected. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Staminate and pistillate clusters on different shrubs; the former almost round at first, the latter conspicuous only when seeding; then their pappus is white, and about 1/3 in. long. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors Achenes oblong, smooth; pappus of numerous soft capillary bristles.—Smooth and tall perennial herbs, with alternate often petioled leaves, and rather large heads, in flat corymbs. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes oblong, flattish, not ribbed; pappus of numerous bristles united into a ring at the base, plumose to the middle, deciduous.—Herbs, mostly biennial, with sessile alternate leaves, often pinnatifid, prickly. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Stem 2–3° high; peduncle thickened and fistulous below the head; flowers purple; achenes and pappus 3´ long.—Sparingly escaped from cultivation. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Pubescent annual or biennial, resembling May-weed, but not ill-scented; leaves less finely 1–2-pinnately parted; chaff of the receptacle lanceolate, pointed; pappus a minute border.—Waste places; rare. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes terete, with 5–10 rugose ribs; pappus of 1 or 2 rows of plumose bristles.—Coarse rough-bristly annuals or biennials, with yellow flowers. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Heads, etc., nearly as in Taraxacum, but the soft pappus reddish or rusty-color, and surrounded at base by a soft-villous ring.—Mostly annual or biennial herbs, scapose or often branching and leafy below. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes flattened; pappus simple and rather scanty, or with some outer minute scales. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes short and thick, compressed or turgid, truncate, glabrous; pappus of 2–8 caducous awns. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z More downy and perennial, pleasantly strong-scented; sterile shoots depressed or creeping; leaves very finely dissected; chaff of the receptacle blunt; pappus none.—Established near Lewiston, Delaware, Nuttall. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Stems 2–8° high; leaves lanceolate; involucral scales acuminate; pappus of few or many minute bristles and 2 awns or none. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Stem diffusely branched; leaves lance-linear, those on the branchlets very small and awl-shaped; rays short, mostly white; pappus of several very short bristles and 2 short awns.—Prairies of S. Ill. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Rays inconspicuous, in several rows, scarcely longer than the pappus; pappus simple; annuals. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes ovoid; pappus none.—Coarse homely weeds, with opposite or alternate lobed or dissected leaves, and inconspicuous greenish flowers, in late summer and autumn; ours annuals, except the last. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes oblong, tapering at the end; pappus copious, of very fine and white soft hairs.—Erect and coarse annuals, of rank smell, with alternate simple leaves, and paniculate-corymbed heads of whitish flowers. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes of disk and ray similar, striate, without pappus.—Perennial herbs, with toothed, pinnatifid, or divided leaves, and single or corymbed heads. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Stem diffusely much branched; leaves pinnately lobed or spinulose-toothed; heads sessile, the middle scales of the ovoid involucre spiny; pappus none; flowers purple; root annual.—Seaports, The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achene with broad summit; pappus a short crown. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Scales well imbricated, coriaceous, with short herbaceous mostly obtuse spreading tips; pappus of rigid bristles; stem-leaves all sessile, none heart-shaped or clasping; heads few, or when several corymbose, large and showy. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes oblong, flattened, wrinkled transversely; pappus short, of numerous rough bristles, separate and deciduous.—Coarse biennial weeds, with large unarmed and petioled leaves, and small solitary or clustered heads; flowers purple, rarely white. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes smooth, 10-ribbed, with distinct beak or none, pappus longer than the achene, white, of copious and unequal rigid capillary bristles.—Perennial scapose herbs, with elongated linear tufted root-leaves, and yellow flowers. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes oblong-ovate to fusiform, 4–5-ribbed, the ribs roughened, the apex prolonged into a very slender beak, bearing the copious soft and white capillary pappus.—Perennials or biennials; leaves radical, pinnatifid or runcinate; flowers yellow. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Rather low, slender; leaves narrowly linear, the upper filiform; disk-flowers 10–20, their pappus of 5–8 bristle-like chaff united at base and slightly dilated upward.—Plains, The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Involucre as in § 6; pappus simple, fine and soft; glabrous annuals, bearing numerous small heads and with narrow entire leaves. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Involucre not much imbricate, scarcely calyculate; achenes oblong; pappus not copious. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Scales of the campanulate involucre in 2 or 3 rows, nearly equal, linear, the outer foliaceous and loose; pappus copious, very soft; rays very short or without ligules; low annuals with numerous rather small heads. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Anthers with tails or acutely sagittate; pappus none.—Low, densely floccose-woolly annuals; extreme western. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes terete; pappus of the central flowers capillary, of the outer ones mostly none.—Annual, low, branching woolly herbs, with entire leaves, and small heads in capitate clusters. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Bristles of the pappus united at the very base into a ring, so falling off all together. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z The original European species has soft white pappus. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes short, 3–4-sided, or in the disk laterally flattened, roughened on the sides, hairy at the summit; pappus none, or an obscure denticulate crown.—An annual rough herb, with slender stems and opposite leaves. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes thick and short, 4-sided; pappus a small toothed border.—Perennial herbs, with the stout and nearly simple stems naked above and terminated by a single large head; leaves chiefly alternate, 3–5-nerved. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes obovoid, with a small summit and no pappus.—Herbs or shrubby plants, bitter and aromatic, with small commonly nodding heads in panicled spikes or racemes; flowering in summer. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Scales of the globular involucre fringe-margined; false rays large; pappus very short; leaves linear, entire, or toothed at the base; root annual.—Roadsides, escaped from gardens. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes cylindrical, ribbed; pappus double, the outer of minute scale-like bristles, the inner of copious capillary bristles.—Perennial herbs, with leafy stems, alternate and acuminate or very acute leaves and mostly purple flowers. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes oblong; pappus none.—Slender branching annuals, with angled or toothed leaves, and loosely panicled small heads; flowers yellow. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes striate; pappus of numerous small chaffy scales, forming a short crown.—Branching perennials, with deep roots; the sessile heads 2 or 3 together, axillary and terminal. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z The outer pappus of very small chaffy bristles, much shorter than the inner of copious capillary bristles. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes fusiform; pappus of 5 or fewer thin chaff and alternating awns. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Roughish, especially the leaves, which are disposed to be less narrowly pointed, the upper sometimes entire; rays broadly oblong to linear or oblanceolate; pappus coroniform and chaffy or of 2 or 3 conspicuous teeth. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes oblong, flat, destitute of pappus.—Coarse and vile weeds, with annual roots, low and branching stout stems, and alternate toothed or lobed petioled leaves; flowering in summer and autumn. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes obovoid or oblong, attached obliquely at or near the base; pappus setose or partly chaffy or none.—Herbs with alternate leaves and single heads. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Scales of the globular involucre appendaged, and with a black pectinately ciliate fringe; rays wanting; pappus very short; leaves lanceolate, entire, or the lower lyrate-toothed, rough; root perennial.—Waste places, E. New Eng. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Achenes more slender; pappus of 10–15 small oblong chaff and 15–20 bristles. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z |
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