Crossword clues for plumule
The Collaborative International Dictionary
Plumula \Plu"mu*la\, n.; pl. L. Plumule, E. -las. [L. See Plumule.]
(Bot.) A plumule.
(Zo["o]l.) A down feather.
Plumule \Plu"mule\, n. [L. plumula, dim. of pluma a feather; cf. F. plumule.]
(Bot.) The first bud, or gemmule, of a young plant; the bud, or growing point, of the embryo, above the cotyledons. See Illust. of Radicle.
--Gray.-
(Zo["o]l.)
A down feather.
The aftershaft of a feather. See Illust. under Feather.
One of the featherlike scales of certain male butterflies.
Wiktionary
n. 1 (context botany English) The first bud, or gemmule, of a young plant; the bud, or growing point, of the embryo, above the cotyledons. 2 (context zoology English) A down feather. 3 (context zoology English) The aftershaft of a feather. 4 (context zoology English) One of the featherlike scales of certain male butterfly.
WordNet
n. down feather of young birds; persists in some adult birds
Usage examples of "plumule".
Here then the arching of the plumule plays the same part as in the case of the petioles of the Delphinium.
It has already been stated that the cotyledons of Phalaris and Avena, the plumules of Asparagus and the hypocotyls of Brassica, were likewise able to displace the same kind of sand, either whilst simply circumnutating or whilst bending towards a lateral light.
It has already been stated that the cotyledons of Phalaris and Avena, the plumules of Asparagus and the hypocotyls of Brassica, were likewise able to displace the same kind of sand, either whilst simply circumnutating or whilst bending towards a lateral light.
When the cotyledons are hypogean, that is, remain buried in the soil, the hypocotyl is hardly developed, and the epicotyl or plumule rises in like manner as an arch through the ground.
Thirdly and lastly, radicles when they first protrude from the seed are always geotropic, and plumules or shoots almost always apogeotropic.
This fact leads to the belief that the nocturnal movements of the abovenamed species has been acquired for some special purpose, which may be to protect the young plumule from radiation, by the close contact of the whole basal portion of the two cotyledons.
Externally roothairs are formed on the confluent petioles, either a little above, or on a level with, the plumule.
Their petioles are completely confluent, forming a tube which terminates downwards in a little solid point, consisting of a minute radicle and hypocotyl, with the likewise minute plumule enclosed within the base of the tube.
With germinating monocotyledonous seeds, of which, however, we did not observe a large number, the plumules, for instance, those of Asparagus and Canna, are straight whilst breaking through the ground.
For instance, with the common bean, the epicotyl or plumule is bowed into an arch whilst breaking through the seedcoats, as shown in Fig.
Canna Warscewiczii, circumnutation of plumules, 58, 59 --, of leaf, 252 Cannabis sativa, movements of leaves, 250 --, nocturnal movements of cotyledons, 307 Cannabis sativa, sinking of the young leaves at night, 444 Cassia, nyctitropic movement of leaves, 369 Cassia Barclayana, nocturnal movement of leaves, 372 --, slight movement of leaflets, 401 -- calliantha, uninjured by exposure at night, 289, n.