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6. Ypsilandra Franchet, Nouv. Arch. Mus. Hist. Nat. ser. 2, 10: 93. 1887.

丫蕊花属 ya rui hua shu

Chen Xinqi (陈心启 Chen Sing-chi); Minoru N. Tamura

Herbs perennial, with a short, thickened, slightly fleshy rhizome, glabrous. Leaves basal, rosulate, linear to lanceolate or oblanceolate, or spatulate, basally gradually narrowed to a petiole. Scape arising from axils of lateral leaves, erect, simple, with several to many scaly leaves. Inflorescence a terminal raceme, 2--30-flowered; bract absent. Flowers bisexual, usually nodding at anthesis, ascending in fruit, spreading funnelform. Tepals 6, free, with a nectary gland basally on adaxial side, persistent. Stamens 6, rather long, free from tepals, inner ones basally adnate to ovary, outer ones free; anthers usually reniform, basifixed, with confluent locules. Ovary superior, 3-lobed, 3-loculed; ovules many per locule. Style 1, very short to long; stigma capitate to 3-cleft. Fruit a capsule, trigonous, 3-lobed apically, loculicidal. Seeds numerous, narrowly fusiform, both ends caudate.

Five species: Bhutan, China, Myanmar, Nepal; five species (three endemic) in China.

1 Stamens and style not extending beyond tepals at anthesis; stigma shortly or deeply 3-lobed (lobes 0.3--0.8 mm).   (2)
+ Stamens and style extending beyond tepals at anthesis; stigma capitate, slightly or scarcely 3-lobed.   (3)
2 (1) Stigma deeply 3-lobed (lobes ca. 0.8 mm); style 1--1.5 mm; tepals 4--5 mm, spatulate or oblanceolate to elliptic, shorter than capsule; flowers 5--17 per scape   4 Ypsilandra yunnanensis
+ Stigma shortly to moderately 3-lobed (lobes 0.3--0.5 mm); style 2.5--6 mm; tepals 7--12 mm, linear to linear-lanceolate, longer than capsule; flowers 2--6 per scape   5 Ypsilandra alpina
3 (1) Scape densely covered with many imbricate, scaly leaves; pedicel shorter than tepals   2 Ypsilandra kansuensis
+ Scape laxly covered with several scaly leaves; pedicel equaling tepals.   (4)
4 (3) Either pedicel or tepals 6--10 mm; stamens and style obviously extending beyond tepals at anthesis; ovary lobes 1/3--2/5 as long as ovary   1 Ypsilandra thibetica
+ Either pedicel or tepals 4--6 mm; stamens and style slightly extending beyond tepals at anthesis; ovary lobes 1/5--1/4 as long as ovary   3 Ypsilandra cavaleriei

Lower Taxa


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