Definition of involucre

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Involucre (n.) A continuous marginal covering of sporangia, in certain ferns, as in the common brake, or the cup-shaped processes of the filmy ferns..

Lern More About Involucre

Monophyllous :: Monophyllous (a.) One-leaved; composed of a single leaf; as, a monophyllous involucre or calyx..
Trichomanes :: Trichomanes (n.) Any fern of the genus Trichomanes. The fronds are very delicate and often translucent, and the sporangia are borne on threadlike receptacles rising from the middle of cup-shaped marginal involucres. Several species are common in conservatories; two are native in the United States..
Perichaeth :: Perichaeth (n.) The leafy involucre surrounding the fruit stalk of mosses; perichaetium; perichete.
Xanthium :: Xanthium (n.) A genus of composite plants in which the scales of the involucre are united so as to form a kind of bur; cocklebur; clotbur.
Aggregate :: Aggregate (a.) Composed of several florets within a common involucre, as in the daisy; or of several carpels formed from one flower, as in the raspberry..
Perianth :: Perianth (n.) A saclike involucre which incloses the young fruit in most hepatic mosses. See Illust. of Hepatica.
Artichoke :: Artichoke (n.) The Cynara scolymus, a plant somewhat resembling a thistle, with a dilated, imbricated, and prickly involucre. The head (to which the name is also applied) is composed of numerous oval scales, inclosing the florets, sitting on a broad receptacle, which, with the fleshy base of the scales, is much esteemed as an article of food..
Oak :: Oak (n.) Any tree or shrub of the genus Quercus. The oaks have alternate leaves, often variously lobed, and staminate flowers in catkins. The fruit is a smooth nut, called an acorn, which is more or less inclosed in a scaly involucre called the cup or cupule. There are now recognized about three hundred species, of which nearly fifty occur in the United States, the rest in Europe, Asia, and the other parts of North America, a very few barely reaching the northern parts of South America and Afric
Masterwort :: Masterwort (n.) The Astrantia major, a European umbelliferous plant with a showy colored involucre..
Spathe :: Spathe (n.) A special involucre formed of one leaf and inclosing a spadix, as in aroid plants and palms. See the Note under Bract, and Illust. of Spadix..
Burr :: Burr (n.) Any rough or prickly envelope of the seeds of plants, whether a pericarp, a persistent calyx, or an involucre, as of the chestnut and burdock. Also, any weed which bears burs..
Involucre :: Involucre (n.) A whorl or set of bracts around a flower, umbel, or head..
Gnaphalium :: Gnaphalium (n.) A genus of composite plants with white or colored dry and persistent involucres; a kind of everlasting.
Involucrated :: Involucrated (a.) Having an involucre; involucred.
Involucre :: Involucre (n.) The peridium or volva of certain fungi. Called also involucrum.
Immortelle :: Immortelle (n.) A plant with a conspicuous, dry, unwithering involucre, as the species of Antennaria, Helichrysum, Gomphrena, etc. See Everlasting..
Acorn Cup :: Acorn cup () The involucre or cup in which the acorn is fixed.
Involucret :: Involucret (n.) An involucel.
Involucel :: Involucel (n.) A partial, secondary, or small involucre. See Illust. of Involucre..
Involucre :: Involucre (n.) A continuous marginal covering of sporangia, in certain ferns, as in the common brake, or the cup-shaped processes of the filmy ferns..
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