Identifier: textbookofstruct00thom (
find matches)Title:
Text-book of structural and physiological botanyYear:
1877 (
1870s)Authors:
Thomé, Otto Wilhelm, 1840- Bennett, Alfred William, 1833-1902Subjects:
Plant physiologyPublisher:
New York : J. Wiley & sonsContributing Library:
Smithsonian LibrariesDigitizing Sponsor:
Biodiversity Heritage LibraryView Book Page:
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view book online to see this illustration in context in a browseable online version of this book.Text Appearing Before Image:inia) ; BurseracecE (Boswellia, Canarium, Balsamodendron, Bur-sera, A77iyris) ; Meliacecs (Melia, Swietenia, Cedrela, Chloroxylon). Division V. THALMiFLORi^.—Sepals usually distinct and separate,free from the calyx ; petals hi one, two, or many whorls, hypogynous ;stamens hypogynous, rarely inserted on a longer or shorter receptacleor on a disc ; ovary superior. Cohort I. MalVALES. Flowers usually regular; sepals five, rarelytwo to four, free or united, valvate or imbricate ; petals as many assepals, or absent ; stamens usually indefinite and monadelphous ; ovary3-locular or more, rarely monocarpellary; placentation axile.Shrubs, rarely herbs or trees, with alternate, usually stipulate, simpleor compound leaves.) Order I. Malvace^. (Fig. 523.) Herbs, shrubs, or trees, withsimple, alternate, stipulate leaves. The calyx is 3- to 5-cleft, and usuallysurrounded by an epi-calyx or involucre of bracts ; the petals are equal in 4o8. Structural and Physiological Botany.Text Appearing After Image:Fig K2^.—Malva sylvestris; I. portion of plant (reduced); II. the monadelphousstamens (magnified); III. the pistil; IV. the fruit (natural size). special Morphology and Classification, 409 number to the lobes of the calyx, and contorted in aestivation (while thecalyx is valvate) ; the filaments of the numerous stamens are coherent attheir base with the petals, and united into a tube which encloses thesuperior ovary ; the anthers are unilocular and dehisce in a semicircularline ; the ovary multicarpellary, the carpels arranged round a centralaxis, and either free or united ; the fruit a capsule or schizocarp ; thecotyledons of the straight embryo are folded together, and the seed haslittle or no endosperm. (Principal genera :—Malope, Althcea^ Lavatera,Malva, Hibiscus, Gossypitim, Sida, Abutilon, Adansoitia, Bombax,Eriodendron, Dzirio.) Many plants belonging to this order are officinalon account of the quantity of mucilage they contain, as the roots ofAlthcea officinalis, the flowerNote About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.