Cryptotaenia japonica seeds
Cryptotaenia japonica seeds mature in Oct.鸭儿芹 ya er qin. Damp places in forests, ditches; 200–2400 m. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hebei, Hubei, Hunan, Jiangsu, Jiangxi, Shaanxi, Shanxi, Sichuan, Taiwan, Yunnan [Japan, Korea].
This species is used in traditional Chinese medicine as a tonic for strengthening the body. It is a distinctive, widespread taxon exhibiting almost continuous variation in leaf and inflorescence form across the range. It is here treated as a species (with three forms: f. japonica, f. dissecta (Y. Yabe) Hara, and f. pinnatisecta S. L. Liou) closely resembling, but distinct from, the North American Cryptotaenia canadensis (Linnaeus) de Candolle.
Details
Plants 20–100 cm. Basal and lower petioles 5–20 cm, with oblong sheaths; blade triangular to broad-ovate, 2–14 × 3–7 cm; middle leaflets rhombic-obovate or cordate, 2–9 × 1.5–10 cm; lateral leaflets obliquely long-ovate to obovate, 1.5–8 × 1–6 cm. Bracts absent or 1, linear, 4–10 × 0.5–1.5 mm; rays 2–3, 0.5–3.5 cm, very unequal; bracteoles 1–3, subulate, 4–10 mm; pedicels 2–4, 1–14 mm, very unequal. Calyx teeth 0.1–0.3 mm, unequal. Petals 1–1.2 × ca. 0.6–1 mm. Fruit 4–6 × 1–1.5 mm. Fl. and fr. Feb–Oct. n = 11*.
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