| 单词 | cleistogamous |
| 例句 | Pedicels short and bracts small; corolla pale yellow, 4´´ long, with short spur and entire crest, or flowers often cleistogamous and much smaller, without spur or crest; pods ascending, torulose; seeds obtuse-margined, smooth and shining.—N. 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 Amphicarpum, native in the south-eastern United States, has fertile cleistogamous spikelets on filiform runners at the base of the culm, those on the terminal panicle are sterile. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z Every plant which produces these cleistogamous or bud-fertilized flowers bears also more conspicuous and open flowers, usually of bright colors. The Elements of Botany For Beginners and For Schools In other cases precautions are taken to prevent cross-fertilisation, as in the numerous cleistogamous or closed flowers. Darwinism (1889) The beech-drop bears cleistogamous or blind flowers in addition to the few showy ones needed to attract insects. Wild Flowers Worth Knowing Finely puberulent; leaves mostly ovate and acutish with a cordate base, often small; flowers small and mostly cleistogamous.—Sandy or stony shores and islands of Lakes Huron and Superior. 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 This species produces an abundance of late cleistogamous flowers on erect stems. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors His view that cleistogamous flowers are derived from originally chasmogamous flowers has been confirmed by more recent researches. Darwin and Modern Science Leaves commonly narrower and oblong; flowers for most of the season cleistogamous.—Common with the ordinary form. 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 In addition to its showy blossoms, which so successfully invite insects to transfer their pollen, thereby counteracting the bad effects of close inbreeding, the plant bears inconspicuous cleistogamous or blind ones also. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors Only 1–2´ high, bearing 1 or 2 evidently cleistogamous purplish flowers, not larger than a pin's head; capsule becoming 1´´ long. 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 Every plant which bears cleistogamous or blind flowers - violets, wood-sorrel, jewelweed, among others - must also display some showy ones. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors The flowers of these plants, in which, however,—in contrast to the cleistogamous flowers—the corolla is well developed, remain closed and fruit is produced. Darwin and Modern Science These cleistogamous flowers afford a striking example of habitual self-pollination, and H. von Mohl drew special attention to them as such shortly after the appearance of Darwin's Orchid book. Darwin and Modern Science If it were only a question of producing seed in the simplest way, cleistogamous flowers would be the most conveniently constructed. Darwin and Modern Science Capsule prismatic or elongated-oblong, 3-celled, opening by 3 small lateral valves.—Low annuals, with axillary blue or purplish flowers, in American species dimorphous, the earlier being cleistogamous. 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 In England, where this jewel-weed is rapidly becoming naturalized, Darwin recorded there are twenty plants producing cleistogamous flowers to one having showy blossoms which, even when produced, seldom set seed. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors Some of the plants with cleistogamous flowers might afford examples of such cases. Darwin and Modern Science |
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