File:Text-book of structural and physiological botany (1877) (14776435682).jpg

Identifier: textbookofstruct00thom (find matches)
Title: Text-book of structural and physiological botany
Year: 1877 (1870s)
Authors: Thomé, Otto Wilhelm, 1840- Bennett, Alfred William, 1833-1902
Subjects: Plant physiology
Publisher: New York : J. Wiley & sons
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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thecoats confluent with the nucleus ; seeds albuminous ; embryo usuallyminute ; flowers generally in umbels.) Order I. Umbellifer^. (Figs. 505-513.) Herbs, rarely shrubs,with round or furrowed jointed stem, and alternate usually compoundleaves sheathing at the base. The flowers are hermaphrodite (exceptoccasionally the outermost in the umbel), and are arranged in simple orcompound umbels, which in some genera are contracted into capitula bythe shortening of the axis ; the inflorescence is usually surrounded by aninvolucre consisting of a single whorl of bracts ; when this includes theentire inflorescence it is called the ^^;2fnz/zV^zt^/^/^?^ ; when it includesonly a secondary umbel, a partial involucre or involucel. The calyx-tube special Morphology and Classification. 395 is adherent to the ovary, but with a free five-toothed or entire margin(which is however sometimes almost obsolete). The petals are five, dis-tinct, entire, emarginate or two-lobed, the outer ones often larger than
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Fig. 506.—I. j^tJrusa Cynnpinjft, fools parsley (natural size) ; II. fruit (magnified) ;III. section of fruit. the inner, or rayed ; adherent to the calyx and alternate with its teeth.The stamens are five, rolled up in vernation; the ovary usually bi-, rarely 39^ Structural aiid Physiological Botany,

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