| 单词 | rachis |
| 例句 | It had a magenta rachis down the center with soft green vanes that shimmered yellow and purple and blue depending on how you turned it. The Reader 2016-01-12T00:00:00Z Each leaflet may have its own stalk, but is attached to the rachis. Biology for AP Courses 2022-06-09T00:00:00Z “The thickness of the rachis in some specimens is 3 microns thick. That’s less than the size of the average cell,” O’Connor says. Ancient bird fossils have ‘the weirdest feathers I have ever seen’ 2018-12-14T05:00:00Z But this specimen lacked the rachis; it just had barbs and barbules down its ribbonlike tail. That Thing With Feathers Trapped in Amber? It Was a Dinosaur Tail 2016-12-08T05:00:00Z Their structure suggests that the two finest tiers of branching in modern feathers, known as barbs and barbules, arose before the rachis formed. 'Beautiful' dinosaur tail found in amber - BBC News 2016-12-08T05:00:00Z Fruit.—Fleshy, coalescent and sunk in the rachis. The Wild Flowers of California: Their Names, Haunts, and Habits 2012-02-17T03:00:37.163Z The distal ends of these girdles give off several branches, which traverse the petiole and rachis as numerous collateral bundles. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z Spikelets falling singly from the unjointed rachis of the spike or the ultimate branches of the panicle. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z That is interesting because the rachis seems to aid in flight. That Thing With Feathers Trapped in Amber? It Was a Dinosaur Tail 2016-12-08T05:00:00Z The leaves are smooth above but somewhat hairy beneath with a winged rachis and about 9 to 21 leaflets that are slightly toothed. Forest Trees of Illinois How to Know Them 2011-10-08T02:00:23.997Z Pinnate, having its parts arranged in pairs along a common rachis. The Wild Flowers of California: Their Names, Haunts, and Habits 2012-02-17T03:00:37.163Z Megaclinium.—A singular genus from Tropical Africa, closely allied to Bulbophyllum, their chief characteristic being the singular flat rachis of the inflorescence, which bears a single row of insect-like, brownish flowers on each side. Orchids A. Spikelets one-flowered, rarely two-flowered as in Zea, falling from the pedicel entire or with certain joints of the rachis at maturity. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z The finding suggests that the barbs and barbules evolved before the rachis in feathers. That Thing With Feathers Trapped in Amber? It Was a Dinosaur Tail 2016-12-08T05:00:00Z The origin of the generic name arachis is somewhat obscure; it is said to come from a, privative, and rachis, a branch, meaning having no branches, which is not true of this plant. The Peanut Plant Its Cultivation And Uses All the flowers of each triplet of spikelets on both sides of the rachis are fertile and produce ripe fruits; hence the ear produces six longitudinal rows of grain. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" This is the rachis—and down here below this, is the rhizoma; and the little seed places that come on the back of the frond, are thecae. The Old Helmet, Volume I Each raceme has an axis, called the rachis, which bears unilaterally two rows of bud-like bodies. A Handbook of Some South Indian Grasses Elongation of the secondary flower-stalks.—In the previous section the effect of elongation of the main rachis has been considered. Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants Having two to many distinct blades on a common leafstalk or rachis. Handbook of the Trees of New England The peculiar ramenta are to be looked for along the insertion of each pinna, and along the rachis, in which all have the peculiar structure. Journals of Travels in Assam, Burma, Bhootan, Afghanistan and the Neighbouring Countries The ovicells are placed in a single series on one side of the rachis, as in S. digitalis, but are widely different in form. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 1 All the species in which there is a joint just below the spikelet, in the pedicel, in the rachis, or at the base of a cluster of spikelets come under one series Panicaceæ. A Handbook of Some South Indian Grasses It was not practicable to examine the arrangement of the vascular bundles in the rachis. Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants With the leaflets arranged along the sides of the rachis. Handbook of the Trees of New England Stipes and rachis dark brown and the sori short, near the midrib. The Fern Lover's Companion A Guide for the Northeastern States and Canada The rachis of the stem is divided into distinct internodes, from each of which are given off two pinnae, and upon which are also placed usually six cells, three on either side. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 1 The spikelets of the grasses coming under this series, when mature, fall away singly by themselves, or with their pedicels, or in groups with portions of the rachis. A Handbook of Some South Indian Grasses In the normal leaf of this plant there is between the bases of the pinnæ, a small reddish gland or stipel? attached to, or projecting from, the upper surface of the rachis. Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants I. that a frond of this Fern, as yet only slightly lobed and with a rachis only .23 inch in height, plainly circumnutated.* The Power of Movement in Plants Divisions oblong, obtuse, finely serrate or cut-toothed, those nearest the rachis sometimes separate. The Fern Lover's Companion A Guide for the Northeastern States and Canada Cells urceolate; deeply emarginate posteriorly, entire in front, ventricose below; a small pedunculate infundibuliform process attached in front to the projecting portion of the rachis on a level with upper border of the cell. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 1 The inflorescence consists of 2 to 5 sessile alternate spikes, usually distant and spreading and varying in length from 1 to 8 inches; the rachis is flattened and winged. A Handbook of Some South Indian Grasses The spikes are whorled, about 3 inches or so in length, naked towards the base to about one-fourth of its length, the rachis is fine, filiform, scabrid. A Handbook of Some South Indian Grasses With mature plants, the flower-stems and the leaves of some few species, and the rachis of several ferns, as they emerge separately from the ground, are likewise arched. The Power of Movement in Plants Pinnæ oblique to the rachis, the lower ones broadly triangular, the upper ones elongated. The Fern Lover's Companion A Guide for the Northeastern States and Canada They are placed all on one side of the rachis, generally in single file, but sometimes in pairs. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 1 The spikes are usually few, 2 to 6, 3 to 6 inches long, with a triquetrous, narrowly winged rachis. A Handbook of Some South Indian Grasses The inflorescence is a solitary cylindric raceme of involucels, 2 to 4 inches long, enclosed in the uppermost leaf-sheath; the rachis is flexuous, angular and smooth. A Handbook of Some South Indian Grasses The inflorescence is usually enclosed in the leaf-sheath, 1 to 6 inches long; the rachis is flexuous, angular and glabrous. A Handbook of Some South Indian Grasses Pinnules on the inferior side of the pinnæ often elongated, especially the lower pair, the pinnule nearest the rachis being usually the longest, at least in the lowest pinnæ. The Fern Lover's Companion A Guide for the Northeastern States and Canada The ovicells arise from the back of the rachis towards the side. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 1 The spikelets are oblong, acute, binate, one pedicel being shorter than the other, usually appressed to the rachis and not spreading. A Handbook of Some South Indian Grasses The inflorescence is a panicle, 2 inches long and broad, somewhat triangular in outline; the rachis and the branches are stiff, slender and smooth, the lower branches are a little deflexed. A Handbook of Some South Indian Grasses The rachis is herbaceous, broad flexuous, jointed and bearing at each joint a solitary globose cluster of two or three perfect 1-flowered glabrous spikelets surrounded by many short spinescent glumes of imperfect ones. A Handbook of Some South Indian Grasses Var. glandulòsa has glandular hairs on the pinnæ, rachis and even the stipes of the sterile frond. The Fern Lover's Companion A Guide for the Northeastern States and Canada When viewed posteriorly, the cells are seen through the transparent rachis, and it might thus at first sight appear as if the rachis itself were cellular and not tubular, but such is not the case. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 1 The inflorescence is of several slender spikes, usually drooping, 2 to 4 inches; the rachis is filiform and trigonous. A Handbook of Some South Indian Grasses The inflorescence is a spike-like terminal panicle varying in length from 3/4 to 2 inches; the rachis is wavy, slender, angular or grooved, pubescent, the peduncle is striate, pubescent and enclosed by the leaf-sheath. A Handbook of Some South Indian Grasses The main rachis of the inflorescence is usually jointed at the base. A Handbook of Some South Indian Grasses Sori numerous, rather near the midvein, stipe and rachis lustrous brown. The Fern Lover's Companion A Guide for the Northeastern States and Canada Ovicell pedunculate ovoid, adnate to the rachis, with a lateral opening. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 1 The spikelets are linear-lanceolate, solitary or in distant pairs, glabrous or ciliate, pedicelled and when binate the upper pedicel often longer than the spikelets, usually spreading and not appressed to the rachis. A Handbook of Some South Indian Grasses The spikelets are all similar, in compound racemes or panicles; the first glume not sunk in the hollow of the rachis. A Handbook of Some South Indian Grasses The first glume is thick, coriaceous and closely embraces the rachis of the spike by its involute margin and the other glumes are within. A Handbook of Some South Indian Grasses The spikes are very short at the ends of very fine branches, solitary, binate or fascicled, with very fragile rachis; joints are very short, slender with cupular tips. A Handbook of Some South Indian Grasses Colour bright brown, rachis shining, very dark brown; polypidom about six inches high, simply pinnulate, pinnules about half an inch; thickly and regularly disposed, alternate. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 1 The spikes are slender, erect or spreading with fine winged glabrous rachis. A Handbook of Some South Indian Grasses D. Joints of rachis and pedicels of upper spikelets slender and tips obliquely truncate. A Handbook of Some South Indian Grasses Joints of the rachis and the pedicels are slightly flattened, ciliated along the narrow edges; the pedicels of the stalked spikelets are half as long as the sessile spikelets. A Handbook of Some South Indian Grasses Spikelets are 2-flowered, narrow, biseriate, unilateral, imbricate on the rachis of a solitary spike; the rachilla is elongate between the flowering glumes and produced beyond them and terminates in a rudimentary awned glume. A Handbook of Some South Indian Grasses The spikes usually solitary, but occasionally binate, 6 to 10 inches long; rachis is quite smooth and dorsally rounded. A Handbook of Some South Indian Grasses Spikes or branches are slender, alternate, 1 to 2-1/2 inches, becoming shorter upwards, thickened and puberulous at the base, and the secondary rachis is flexuous, grooved, angular, and obscurely pubescent. A Handbook of Some South Indian Grasses The inflorescence consists of two to eight smooth, digitate, green or purplish spikes, 1 to 3 inches long; rachis is slender, compressed or angular, scaberulous. A Handbook of Some South Indian Grasses The panicle is ovoid-oblong or oblong, open or contracted, sparingly branched; branches are filiform, solitary, ramifying from near the base; rachis and nodes are glabrous. A Handbook of Some South Indian Grasses The spikes are solitary or fascicled curved on very short branches 1 to 1-1/2 inches long; rachis is green, undulating, tetragonous, with a broad central nerve on the flat faces. A Handbook of Some South Indian Grasses The name rachis is given to the axis of the spike, raceme and panicle, whether the axis is the main one or of the branch. A Handbook of Some South Indian Grasses The rachis of the spike is very slender, angular, flexuous, narrower than the spikelets, scaberulous with a few long cilia at the angles. A Handbook of Some South Indian Grasses The rachis of the inflorescence is usually cylindrical. A Handbook of Some South Indian Grasses In very many grasses the rachis is continuous, but in a few cases it consists of internodes or joints which disarticulate at maturity. A Handbook of Some South Indian Grasses When mature the spikelets fall away either by themselves, singly with their pedicels or in groups with portions of rachis, according to the position of the joint. A Handbook of Some South Indian Grasses The spikelets are small, 1/20 to 1/14 inch, geminate, one short and the other long pedicelled, appressed to the rachis, elliptic, silky with slender crisped hairs, pale green or purplish. A Handbook of Some South Indian Grasses The inflorescence is a raceme of spikes, 5 to 10 inches long, erect or inclined on a short or long, glabrous, strongly channelled peduncle; the main rachis is grooved, angled and scaberulous. A Handbook of Some South Indian Grasses The inflorescence is 4 to 8 inches long; the main rachis is angular, grooved, scabrid on the ridges. A Handbook of Some South Indian Grasses Each spikelet is solitary, and articulate at the very base of a rachis, lanceolate, 1-flowered. A Handbook of Some South Indian Grasses The female inflorescence is a large globose head consisting of short spikelets articulate at the very base of the rachis, short bracts and very long, spreading, rigid rod-like rachises. A Handbook of Some South Indian Grasses The spikelets are numerous and are very closely set along the rachis of the inflorescence, 1/8 inch long, glabrous and ellipsoidal. A Handbook of Some South Indian Grasses The spikelets are white, in two rows on a flattened rachis, obliquely ovoid or gibbously globose, glabrous, sessile, 1/8 inch in length. A Handbook of Some South Indian Grasses Spikelets many, dissimilar, in solitary, digitate or fascicled racemes or spikes; first glume not sunk in the hollow of the rachis. A Handbook of Some South Indian Grasses The first glume is thickly coriaceous, white, shining, closely embracing the rachis and the other glumes entire at the tip. A Handbook of Some South Indian Grasses The inflorescence consists of a solitary, glabrous, and compressed spike, with a somewhat fragile rachis; the joints are compressed, hollow and clavate. A Handbook of Some South Indian Grasses The spikes are compressed, 2- to 3-nate, or solitary at the ends of slender branches, with a rachis not jointed; joints are short, slender and villous. A Handbook of Some South Indian Grasses The inflorescence is a compound spike varying in length from 4 to 10 inches, erect; the main rachis is triquetrous, dorsally rounded, glabrous and very thinly scaberulous at the edges. A Handbook of Some South Indian Grasses The two pedicels are flat, prolonged from one side of the rounded rachis, oblong linear, truncate with a few long hairs along the margin. A Handbook of Some South Indian Grasses The spikes are few or many, solitary or panicled, with a jointed usually fragile rachis; the joints are rounded or compressed, hollowed on one side and excavated at the tip. A Handbook of Some South Indian Grasses The first glume is globose, hard, coarsely pitted, with an oblong ventral opening opposite the cavity in the joint of the rachis. A Handbook of Some South Indian Grasses Joints of rachis and pedicels of upper spikelets clavate or trumpet-shaped and tips cupular with toothed margins. A Handbook of Some South Indian Grasses The rachis of the spike is angular, with scattered tubercle-based bristly hairs. A Handbook of Some South Indian Grasses The panicle is narrow, 3 to 6 inches long, peduncle smooth below but thinly pubescent above, lower branches long, few in a whorl; rachis is very slender, angular, glabrous or hairy. A Handbook of Some South Indian Grasses The involucral spikelets are the longest, in contiguous superposed pairs, about 1/2 inch long, and the rachis of the spike is produced beyond these spikelets. A Handbook of Some South Indian Grasses The spikelets are unilaterally biseriate on the rachis which is not jointed at the base. A Handbook of Some South Indian Grasses The inflorescence is a narrow panicle, cylindric, with short crowded branches, some of them remote lower down, peduncle is smooth, and rachis smooth or scaberulous; branches and pedicels are scaberulous. A Handbook of Some South Indian Grasses Spikes are from 1/2 to 2 inches; rachis is slender, flexuous, flattened, scaberulous, with a few long hairs scattered singly along the margins or without these hairs. A Handbook of Some South Indian Grasses The inflorescence is 1/2 to 3 inches long and consists of fascicles of spikelets; the rachis is trigonous, smooth, and flexuous. A Handbook of Some South Indian Grasses Spikelets pointing upward at an acute angle with the rachis of the spike. A Handbook of Some South Indian Grasses E. brevifolia.Spikelets spreading at right angles with the rachis of the spike, spreading or erect. A Handbook of Some South Indian Grasses The spikelets are variable in size, 1/12 to 1/6 inch, 3 to 5, rarely 6-flowered, quite glabrous, biseriate, pointing upward at an acute angle with the rachis. A Handbook of Some South Indian Grasses The inflorescence is a strict spike-like panicle, 6 to 12 inches long by 1/4 to 1/3 inch broad, cylindric, interrupted below; the rachis terete, stout, channelled. A Handbook of Some South Indian Grasses The inflorescence is a panicle with short branches, 1 to 3 inches long, rachis is pubescent; peduncle is 2 to 4 inches long, pubescent. A Handbook of Some South Indian Grasses The first glume is very minute, hyaline and sunk in the hollow of the rachis. A Handbook of Some South Indian Grasses |
| 随便看 |
|
英语例句辞典收录了117811条英语例句在线翻译词条，基本涵盖了全部常用单词及词组的例句翻译及用法，是英语学习的有利工具。