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38. CHAMAERHODOS Bunge in Ledebour, Fl. Altaic. 1: 429. 1829.

地蔷薇属 di qiang wei shu

Li Chaoluan (Li Chao-luang); Hiroshi Ikeda, Hideaki Ohba

Herbs or subshrubs, glandular pilose or pubescent. Flowering stems erect, slender. Leaves alternate; stipules membranous at base, adnate to petiole; leaf blade 1–3 times 3-parted into narrow segments. Inflorescence cymose, corymbose, or paniculate, rarely a solitary flower. Flowers small. Hypanthium obconic, tubular, or campanulate. Sepals 5, erect, valvate, persistent. Petals 5, white or purple. Disk lining mouth of hypanthium, setose with long, rigid hairs, margin thickened. Stamens 5, opposite petals. Carpels 4–10 or more; ovule ascending from base of locule; style basal, articulate at base, deciduous; stigma capitellate. Achenes few or many, ovoid, glabrous, enclosed by hypanthium. Seed erect.

About eight species: Asia, North America; five species in China.

1 Herbs biennial or annual, usually 1-stemmed, 20–50 cm tall, slightly woody at base; petals equaling or slightly longer than sepals; carpels 10–15.   1 C. erecta
+ Herbs perennial or subshrubs, many stemmed, tufted, 5–30 cm tall, woody at base; petals shorter or longer than sepals; carpels 4–8.   (2)
2 (1) Radical leaves 2 or 3 times 3-parted.   (3)
+ Radical leaves once 3-parted or 3-fid.   (4)
3 (2) Flowering stems 10–30 cm tall, sparsely glandular pubescent and villous; ultimate segments of radical leaves linear, apex rounded or acute; cauline leaves present; hypanthium broadly campanulate; petals obovate, longer than sepals, apex emarginate; carpels 4–6.   2 C. canescens
+ Flowering stems 6–10 cm tall, glandular pubescent and villous; ultimate segments of radical leaves oblong-spatulate, apex obtuse; cauline leaves present or absent; hypanthium campanulate or obconic; petals lanceolate-spatulate or cuneate, shorter or slightly longer than sepals, apex rounded; carpels usually 6–8.   3 C. sabulosa
4 (2) Subshrubs, 5–6 cm tall, villous and glandular pubescent; radical leaves 3-parted with linear segments; flowers solitary or 3–5 in cymes.   4 C. altaica
+ Herbs perennial, 5–18 cm tall, pilose or glabrous; radical leaves 3-fid with narrowly linear segments; flowers many, in dichasial panicles.   5 C. trifida

Lower Taxa


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