File:The natural history of plants, their forms, growth, reproduction, and distribution; (1902) (14765587945).jpg

Identifier: naturalhistoryof02kern (find matches)
Title: The natural history of plants, their forms, growth, reproduction, and distribution;
Year: 1902 (1900s)
Authors: Kerner von Marilaun, Anton, 1831-1898 Oliver, Francis Wall, 1864- Macdonald, Mary Frances Ewart Busk, Marian Balfour, Lady
Subjects: Botany
Publisher: London, Blackie
Contributing Library: NCSU Libraries
Digitizing Sponsor: NCSU Libraries

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ly there is a difierence. Thus, in the flowers of theTulip-tree (Liriodendron), whilst the perianth-leaves have a divergence of ^, thestamens are arranged according to the ^ system. In Ranunculus the leaves of theperianth are arranged on the f plan, the stamens on the ■^; in Polygonum theformer on the f, the latter on the f system. 86 STAMENS. Since in every species of plant the number of stamens remains constant, thus inthe Marestail (Hipimris) there is one, in Lilac two, in Iris three, in the Woodrufffour, in the Violet five, and in the Tulip six stamens, their number has been madethe basis of a classification of flowering plants at once convenient and popular,though not strictly scientific. In the well-known System of Linnfeus plants arearranged into groups called Classes, in which the first class (Monandria) includesall forms with a single stamen, the second (Diandria) those with two stamens, andso on. The aggregate of stamens in a flower is termed the Androeciuvi. As a rule the
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Fig. 213.—Stamens of double and monstrous flowers. Vertical section of a green flower of Primula japonica. « Vertical section of a double flower of Primula spectabilis,»-8 Isolated stamens from the same flower, s stamen from a green flower of the Tiger Lily(Lt7t!(m tigrinum). lo, Folia-ceous stamens from a flower of Campanxda Trachelium. 12 Green flower of Saxifraga stellaris. A single stamen fromthe same flower. (All the figures enlarged.) androecium is inserted between the leaves of the perianth and the carpels, so thatfrom without inwards the sequence is perianth, stamens, carpels. Sometimes thecarpels are wanting, so that the stamens constitute the inmost members of theflower; similarly also carpels may be present but no stamens. We distinguish in a stamen that portion which is concerned in the production ofPollen—the Anther—and its stalk, the Filament. The stamens in many flowers arepartly metamorphosed into petals; indeed, there are grounds for believing that allpetals h

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