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Ixeris repens (L.) A. Gray, Mem. Amer. Acad. N. S. 6: 397. 1859; Kitamura, Mem. Coll. Sci. Kyoto Imp. Univ., Ser. B, Biol. 23: 125. 1956; Li, Fl. Taiwan 4: 891. 1978.
濱剪刀股
Lactuca brachyrhyncha HayataPrenanthes repens L.
Stems slender, much elongated underground, to 2 cm long, leafy, rooting at nodes. Petiole 2.5-8.5 cm long, base clasping. Cauline leaves attenuate, rather thick, glabrous, 4-12×2.5-5 cm, 3-5-fid or parted; segments broadly elliptic, irregularly mucronulate. Scapes axillary from radical leaves, 7-9 cm long, 2-6-headed, loosely corymbose, bracts oblong, lower ones sometimes foliaceous. Heads ca. 3 cm across, many flowered, erect; peduncle 1.5-6 cm long. Involucre tubular, glabrous, 10-11×7-8 mm, outer bracts rather prominent, longer than inner, inner bracts 6-8. Florets 17-20; corolla yellow, 15-16 ×2-3 mm. Achenes fusiform, rounded to slightly compressed, brown, 6-7×1-1.5 mm, beak 1.5-2 mm long. Pappus 6 mm long. Chromosome number, n = 8 (Peng et al., Bot. Bull. Acad. Sin. 27: 221. 1986).
TAIPEI: Keelung, Peng 4900; Yenliao, Wang 978. PENGHU: Wuni, Chen 720.
Eastern Asia. Taiwan, sandy beaches.
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