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FOC | Family List | FOC Vol. 10 | Fabaceae | Lotus

6. Lotus tenuis Waldstein & Kitaibel ex Willdenow, Enum. Pl. 2: 797. 1809.

细叶百脉根 xi ye bai mai gen

Lotus corniculatus Linnaeus var. tenuifolius Linnaeus; L. corniculatus subsp. tenuis (Waldstein & Kitaibel ex Willdenow) Briquet; L. glaber Miller, nom. utique rej.; L. tenuifolius (Lin­naeus) Reichenbach.

Herbs, perennial, 20-100 cm, with a taproot, glabrescent or sparsely puberulent with short appressed hairs. Stem slender, erect or ascending. Leaflets 5, obovate-oblanceolate or oblan­ceolate to linear, 4-18 × 1-4 mm, basal 2 shorter; terminal leaf­let of a leaf 1.5-3 × as long as leaf rachis. Umbels (1 or)2-5-flowered; peduncle 3-12 cm, slender; bracts 1-3, 1.5-2 × as long as calyx. Flowers 8-10.5(-11) mm. Calyx 4-6 mm; teeth shorter than tube, narrow part of 2 upper calyx teeth less than half their length. Corolla yellow. Ovary linear; ovules numer­ous; style 4-5.5 mm. Legume straight, cylindric, 9-25 × 1.2-2.5 mm. Seeds light brown, globose, 1.4-1.6 mm, smooth. Fl. May-Aug, fr. Jul-Sep.

Saline, poorly drained grasslands of lake or swamp shores. NW China, Tianjin [Afghanistan, Kazakhstan, Kyrgyzstan, Mongolia, Paki­stan, Russia (European part, Siberia), Tajikistan, Turkmenistan, Uzbeki­stan; N Africa, SW Asia, Europe; introduced in North America, Pacific islands (New Zealand), and South America (Argentina)].

Whether this is a native or introduced species in China needs verification.


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