Defn: One-leaved; composed of a single leaf; as, a monophyllous involucre or calyx.
Defn: A genus of composite plants in which the scales of the involucreare united so as to form a kind of bur; cocklebur; clotbur.
Defn: A special involucre formed of one leaf and inclosing a spadix, as in aroid plants and palms.
Defn: The leafyinvolucre surrounding the fruit stalk of mosses; perichætium; perichete.
Defn: The involucre which surrounds the common receptacle in composite flowers.
The involucre looks as if cut out of white flannel.
The fruit is a smooth nut, called an acorn, which is more or less inclosed in a scaly involucre called the cup or cupule.
Note: The name is also given to the several-leaved involucre of the iris and other similar plants.
A universal involucre is not unfrequently placed at the foot of a universal umbel.
A saclike involucre which incloses the young fruit in most hepatic mosses.
The thyrsus has also its series of leaves; the scale-like or radical leaf is involucre and bractea; the vascular or spathe-leaf is calyx; the tracheal or reticular leaf is corolla.
They are each about an inch across, white, changing to pink or lilac, with an involucre of many narrow bracts, running down the flower-stalk.
The flowers are over an inch across, with bright yellow rays, curling back in fading, an orange center, fading to brown, and the bracts of the involucre tipped with black.
The flower-heads are about an inch across, with bright yellow rays, the involucre sprinkled with short, dark hairs.
The many flowers are an inch or more across, with yellow centers and white, violet, or purple rays, the bracts of the involucre in several rows, with short and rounded tips.
The involucreis almost white, thickly covered with silvery, silky wool, and the flowers are pleasantly sweet-smelling.
Flowers in long spikes with a whiteinvolucre at base.
The flower-stalks each bear a pair of flowers, without scent, emerging from aninvolucre of two bracts.
The stem-leaves are in whorls, forming a kind of involucre below the flower.
The involucre becomes dark red, its lobes turn back and display a pair of berries, disagreeable to the taste, as large as peas, nearly black, the whole affair striking in color and form.
The study in our fifth plate, of the involucre of the waste-thistle,[38] is as good an example as I can give of the more subtle and concealed conditions of this structure.
And I had no more a month than a life, to spare: so the action only of the spreading flower is indicated, but the involucre drawn with precision.
After fertilization has been accomplished throughout the blossom, the involucre closes, and remains closed during the ripening of the fruit.
The leaves of the involucre are spiny in thistles and in teazel (Dipsacus), and hooked in burdock.
In Compositae the name involucre is applied to the bracts surrounding the head of flowers (fig.
In Compositae besides the involucre there are frequently chaffy and setose bracts at the base of each flower, and in Dipsacaceae a membranous tube surrounds each flower.
Compound umbel of Common Dill (Anethum graveolens), having a primary umbel a, and secondary umbels b, without eitherinvolucre or involucel.
This involucre is frequently composed of several rows of leaflets, which are either of the same or of different forms and lengths, and often lie over each other in an imbricated manner.
Large umbel of yellow flowers, no involucre and no involucels.
Involucre conical, of many linear scales, enclosing 15 or more hermaphrodite disk-flowers and several pistillate ray-flowers.
Some botanists include this genus and that of Ostrya in the order Betulaceae, instead of placing them in Cupuliferae, as the nut of the Hornbeam is not surrounded by a cup or husk, but by a leaf-like involucre as shown in fig.
The best brown Ipecacuanha is the powdered root of Cephaelis Ipecacuanha; a plant with small white flowers collected into a globose head, which is shrouded in an involucre closely resembling a common calyx.
The female flowers are disposed in a tuft as shown at c, surrounded by a number of bracts and scales, which afterwards grow together and form a spiny involucre (see fig.
The involucre withers when the calyx becomes juicy; but the remains of it and of the style are often seen on the ripe fruit, as shown at e.
The genus Malope closely resembles the Mallow; except that the petals are not wedge-shaped, and that it has a still larger calyx, the long sepals of which shroud the capsule as the involucre of the filbert does the nut.
Most of these are varieties of the Garland Anemone, already mentioned as having its involucre close to the flower.
The flower is composed of a scaly involucre (shown at a in fig.
The scaly involucreis formed of numerous small members of a dark olive-green colour, neatly arranged and firmly clasping the whole flower.
The ligulate or Strap-shaped corolla mainly belongs to the family of Compositae, in which numerous small flowers are gathered into a head, within an involucre that imitates a calyx.
The bristles form a regular involucre at the base of a group of spikelets in Pennisetum, and in Cenchrus these become united at the base into a mass forming a kind of burr around the spikelets.
This is also true of the Winkler whose involucre is fairly thick but outlines the form of the enclosed nut.
I found the first point of similarity with the filbert is in the involucre covering the nut.
The involucre of the Winkler hazel is formed much more like that of the filbert than that of the hazel.
Another feature about the involucre of the Winkler which classes it with the filberts rather than the hazels is in its appearance and texture, which is smooth and velvety while that of the hazel is hairy and wrinkled.
The flowers of the Teasel are collected in large heads, covered with straight, stiff bristles, and have an involucre of bracts which curve upwards.
The flower-heads are ovoid, surrounded by an involucre of many closely-overlapping bracts with prickly tips.
The involucre is oval in form, covered with cottony down; and its bracts are lanceolate, terminating with a stiff, spreading spine.
The outer bracts of the involucre are small and few in number, and both these and the inner ones are generally tipped with black.
The involucre is globular in form, covered with cottony hairs, and composed of closely-placed bracts.
The involucre bracts are also very narrow, bristly at the top; and the fruits are rendered rough by numerous little glandular projections.
The involucre is brown, with a membranous edge; the ray white, and the disc yellow.
The heads of flowers are about an inch in diameter, solitary on long, terminal stalks, surrounded by an oval involucre of closely-overlapping bracts with sharp points and toothed, membranous margins.
The bracts of the involucre are broad, with a green centre and a dark, downy margin.
The involucre bracts are acute; the receptacle conical; and ray florets always possess a style.
The involucre consists of about eight glaucous scales, about a quarter of an inch in length, and a whorl of small outer ones.
The heads are surrounded by two rows of bracts, the outer of which are shorter and narrower, and the whole involucre assumes a conical form after flowering.
In these theinvolucre is little altered, and the receptacle is attacked by larva.
Involucre of the fruit containing a single terete nut.
The seeds, or properly fruits, are contained singly in a stony involucre or bract, which does not open until the enclosed seed germinates.
The young involucre surrounds the female flower and the stalk supporting the spike of male flowers, and when ripe has the appearance of bluish-white porcelain.
Scales of the bell-shaped involucre ovate or lanceolate, pointed, loosely imbricated in 2 or 3 rows.
Perennial herbs, with palmately multifid radical leaves, the scape bearing a single large yellow flower surrounded by an involucre of a single leaf.
Involucre simple, fleshy, saccate, oblong, truncate, attached to the stem by one side of the mouth.
Involucre cylindrical, of 8 scales in a single row, 8--12-flowered.
Involucre of 2 broad bracts, almost separate and not much longer than the fruit =Hazel, Corylus americana.
Leaves of the involucre broadly obovate to nearly circular, widest near or above the middle =Spurge, Euphorbia helioscopia.
Bracts of the involucre dry and chaffy, at least at the tip; plants always pubescent and usually white-woolly --79.
Plants of the composite type, with several or many small flowerets closely aggregated into a dense head subtended by a calyx-like involucre of small bracts --146.
Plants of the composite type, with several or many small flowerets closely aggregated into a dense head surrounded or subtended by a calyx-like involucre of small bracts --67.
Plants of the composite type, with several or many small flowerets closely aggregated into dense heads subtended by a calyx-like involucre of small bracts --173.
Bracts of the involucre in two distinct sets, differing in form or consistency or both --128.
Flower clusters small and dense, surrounded by a showy involucre of 4 bracts, resembling a corolla of 4 petals --4.
The fruit resembles in shape that of Carya glabra, but the involucre is thicker and splits easily to the base or nearly to the base.
The name may have been given by Marshall to this variety on account of the strong resinous odor of the inner surface of the fresh involucre of the fruit, which I have not noticed in that of the other forms.
A special involucre formed of one leaf and inclosing a spadix, as in aroid plants and palms.
The name is also given to the several-leaved involucre of the iris and other similar plants.
Centaurea solstitialis) having the involucre armed with radiating spines.
In Setaria and allied genera the spikelet is subtended by an involucre of bristles or spines which represent sterile branches of the inflorescence.
In Cynosurus (Dog's tail) the pectinate involucre which conceals the spikelet is a barren or abortive spikelet.
The cup-shaped involucreof Cornucopia is a dilatation of the axis into a hollow receptacle with a raised border.
North and South America, as the involucreclings to the wool of sheep and is removed with great difficulty.
In the dandelion the bracts of the involucre give the best characters.
The scapes themselves are of varying length, often very short, and seldom long, and their umbels display the involucre of bracts in a manner quite analogous to that of the Primula officinalis and P.
In this way they form a kind of involucre around the central parts.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "involucre" in a variety of sentences. We hope that you will now be able to make sentences using this word.
