Title: The classification of flowering plants
Identifier: classificationof02rend (find matches)
Year: 1904 (1900s)
Authors: Rendle, A. B. (Alfred Barton), 1865-1938
Subjects: Plants
Publisher: Cambridge, University press
Contributing Library: Wellesley College Library
Digitizing Sponsor: Boston Library Consortium Member Libraries

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216 FLOWERING PLANTS times stinging hairs. The flowers are bisexual. The receptacle is united with the ovary and forms a variousl)^ shaped tube. The flowers are very various in form, but generally have five sepals, as many alternating petals, wliich are usually free, and numerous stamens arranged in groups opposite tbe often concave petals; staminodes or nectar-secreting scales are frequently present opposite the sepals. The ovary is entirely or partly inferior; the three to seven carpels have each one to numerous ovules usuaUy
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Fig. 105. Mentzelia aspera. A. Tip of shoot with flower, x 4. B. Floral diagram. C. Flower in vertical section, x 2^. D. Fruit shewing apical dehiscence, x 5. E. Seed, x 7. F. Seed cut length\vise, x 7. G, H. Bristly hairs, x 60. on parietal placentas; the ovule has only one integument. The fruit is a straight or spirally twisted capsule, usually with five to seven valves. The seeds contain endosjDerm. (Fig. 105.) There are 13 genera and about 250 sj)ecies. The chief centre of distribution is Chile, but the family is well represented in trojDical South America, spreading southwards to Argentina and northwards through Mexico to California with a few species in the north- eastern United States. The only Old World representative is Kissenia, a monotypic genus, native of the dry country of south- west Africa, Somaliland and South Arabia.

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