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Compositae

Definitions

  • WordNet 3.6
    • n Compositae plants with heads composed of many florets: aster; daisy; dandelion; goldenrod; marigold; lettuces; ragweed; sunflower; thistle; zinnia
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Century Dictionary and Cyclopedia
    • compositae The largest natural order of plants, including over 750 genera and 10,000 species, distributed all over the globe wherever vegetation is found, and divided equally between the old world and the new. They form about a tenth of all phenogamous plants, an eighth of those of North America, and in some regions even a larger proportion. They are herbs, or much more rarely shrubs, scarcely ever arborescent, and are of comparatively slight economic importance. A few species are cultivated for food, as the artichoke (Cynara), the salsify (Tragopogon), and the lettuce (Lactuca); others have useful medicinal properties; and a very large number are cultivated for ornament. The flowers are gamopetalous and mostly pentamerous, sessile in a close head (the compound flower of early botanists, whence the name of the order), and surrounded by an involucre of separate or connate bracts. The ovary is inferior and one-celled, and becomes an achene in fruit, the calyx-limb being reduced to a circle of hairs, awns, scales, or teeth, called the pappus. The stamens are inserted on the corolla, and their anthers are united into a tube, on which account the name Synanthereœ has been sometimes given to the order. The genera of the order are divided into three series, depending upon the character of the corolla, viz.: the Labiatœflorœ (or Mutisiaceœ, of 59 genera, largely South American), having a bilabiate corolla, at least in the perfect flowers; the Liguliflorœ (or Cichoriaceœ, of 56 genera, mostly of the old world), in which the corollas are all ligulate (strap-shaped); and the Tubuliflorœ, having regular tubular corollas in all the perfect flowers. The last series is again divided into 11 tribes. The 10 largest genera of the order, including three tenths of the species, are Senecio (840 species, largely of South America and southern Africa), Eupatorium (430 species, all American), Vernonia (375 species, mostly tropical), Centaurea (316 species, of the Mediterraneo-Persian region), Baccharis (250 species, mostly South American), Helichrysum (235 species, of southern Africa and Australia), Aster (174 species, largely North American), Cnicus (165 species, of the Mediterraneo-Persian region and North America), Artemisia (152 species, of Europe, Asia, and North America), and Hieracium (150 species, of Europe, Asia, and North America). By far the largest North American genus is Aster (124 species), followed by Solidago (78), Erigeron (71), Senecio (57), Aplopappus (45), Artemisia (42), Helianthus (42), Eupatorium (39), Cnicus (37), Bigelovia (31), and Brickellia (31); these genera include two fifths of the species of North America. Also called Asteraceœ.
    • compositae In zoology, a family of compound ascidians, corresponding to the family Botryllidœ; the Synascidiœ (which see).
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Usage

In literature:

W. charged into the Compositae and Umbelliferae like a hero, and demolished ever so many in grand style.
"The Life and Letters of Charles Darwin, Volume I (of II)" by Charles Darwin
I was struck with your remark about the Compositae, etc.
"More Letters of Charles Darwin" by Charles Darwin
I am surprised at what you say about Compositae and Gramineae.
"More Letters of Charles Darwin Volume II" by Charles Darwin
He is even able to leave the family of the Compositae and to go gleaning more or less everywhere.
"Bramble-bees and Others" by J. Henri Fabre
The largest bush in the island (belonging to the family of Compositae) is scarcely so tall as our gorse.
"A Naturalist's Voyage Round the World" by Charles Darwin
Such composita are possible in many different ways.
"The Critique of Pure Reason" by Immanuel Kant
Cum simplicia non possunt neccessitas cogit ad composita.
"The Anatomy of Melancholy" by Democritus Junior
Compositae, Cruciferae, and Gramineae form the bulk of the vegetation.
"Journals of Travels in Assam, Burma, Bhootan, Afghanistan and TheNeighbouring Countries" by William Griffith
In the labiatae none has been discovered, nor in the compositae among the highest plants.
"Scientific American Supplement, No. 623, December 10, 1887" by Various
As in all the Compositae, the anthers are here united in a tube, the pollen being discharged within.
"My Studio Neighbors" by William Hamilton Gibson
Cassini on flowers of compositae, 145.
"On the Origin of Species by Means of Natural Selection" by Charles Darwin
It was late in March, and the ground about the cabin was yellow with low-growing compositae.
"The Wizard's Daughter and Other Stories" by Margaret Collier Graham
Siegesbeckia, one of the Compositae, consists of two species, one inhabiting the Mascarene islands, the other Peru.
"Island Life" by Alfred Russel Wallace
Leaves opposite or in whorls of four 119a, in =COMPOSITAE=, p. 123.
"The Plants of Michigan" by Henry Allan Gleason
Compositae, comprising mugwort, southernwood, and wormwood.
"The New Gresham Encyclopedia. Vol. 1 Part 2" by Various
Compositae, found in Britain and other parts of Europe, and in Asia.
"The New Gresham Encyclopedia" by Various
Compositae formed a minor part of the cover in most of the habitats studied.
"Natural History of the Prairie Vole (Mammalian Genus Microtus)" by E. W. Jameson
COMPOSITAE, gradation of species among the, i.
"The Descent of Man and Selection in Relation to Sex" by Charles Darwin
In Compositae, the tubular flowers of the head as distinct from the ray.
"The Manual of the Botany of the Northern United States" by Asa Gray
From Epilobium on through Umbelliferae and Compositae.
"The Life of Johannes Brahms (Vol 2 of 2)" by Florence May
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In news:

Allow me to introduce you to the Compositae .
Senetti is the brand for a completely new collection of pericallis hybrids, which were obtained by cross-breeding members of the compositae and asteracea families.
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In science:

Because f (n) is an integral function, the values of compositae F ∆(n, k) are integers.
On a property of superposition of the generating functions ln(1/(1-F(x)))
Key words: exponential generating function, composition of generating functions, composita, primality, Touchard’s Congruence, Bell numbers, Euler numbers.
Integer properties of a composition of exponential generating functions
Kruchinin introduced the notion of the composita of a given generating function F (x) = Pn>0 f (n)xn .
Integer properties of a composition of exponential generating functions
The expression F (n, k) is the composita and it’s denoted by F ∆(n, k).
Integer properties of a composition of exponential generating functions
Calculation of the composita is essential for obtaining the coefficients function of a composition of generating functions.
Integer properties of a composition of exponential generating functions
Let us establish the following theorem on calculation of compositae of reciprocal generating functions.
The method for obtaining expressions for coefficients of reverse generating functions
Suppose we have the generating function B (x), b(0) 6= 0 and the composita B∆ (n, k) of the generating function xB (x).
The method for obtaining expressions for coefficients of reverse generating functions
Let us obtain the composita of the function 1 (B (x) − b0 ).
The method for obtaining expressions for coefficients of reverse generating functions
Now, let us establish the theorem on obtaining a explicit formula for the composita of reverse generating function.
The method for obtaining expressions for coefficients of reverse generating functions
R∆ (n, m) is a reciprocal composita for the generating function xH (x) (see the formula 7).
The method for obtaining expressions for coefficients of reverse generating functions
Suppose we have the generating function F (x) = x − x2 − x3, the composita of reverse function needs to be found.
The method for obtaining expressions for coefficients of reverse generating functions
To do this we need to find the composita of reciprocal function of R(x) = x 1−x−x2 .
The method for obtaining expressions for coefficients of reverse generating functions
To do this we need to find the composita of the generating function F (x) = 2 ln(1 + x) − x.
The method for obtaining expressions for coefficients of reverse generating functions
The composita of generating function (−x) has the expression (−1)k δ (n, k).
The method for obtaining expressions for coefficients of reverse generating functions
To do this we find the composita of the generating function R(x) = 2x − ex + 1.
The method for obtaining expressions for coefficients of reverse generating functions
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