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FOC | Family List | FOC Vol. 24 | Liliaceae

10. Trillium Linnaeus, Sp. Pl. 1: 339. 1753.

延龄草属 yan ling cao shu

Liang Songyun (梁松筠 Liang Song-jun); Victor G. Soukup

Herbs perennial, usually with stout rhizome. Stem erect, simple, basally with a few brown, scalelike sheaths. Leaves 3, in a terminal whorl, sessile or shortly petiolate, rhombic-orbicular to ovate, with 3 or 5 main veins and anastomosing veinlets. Flowers bisexual, solitary, terminal, pedunculate. Tepals 6, in 2 whorls, free; outer ones usually green, persistent; inner ones petaloid, rose purple to white, slightly narrower than outer, withering or deciduous after anthesis. Stamens 6; filaments short; anthers basifixed, linear, with very short connective. Ovary ovoid to globose, 3-loculed; ovules several to many per locule. Style short, deeply 3-lobed often to base. Fruit a berry, globose to ovoid. Seeds several to many, ovoid, small.

About 46 species: Bhutan, China, India, Japan, Korea, Myanmar, Nepal, Russia, Sikkim; North America; four species (one endemic) in China.

1 Stems tufted; leaves sessile; inner tepals elliptic or obovate.   (2)
+ Stem solitary; leaves shortly petiolate; inner tepals linear-lanceolate or linear.   (3)
2 (1) Anthers 7--8 mm, longer than filaments   1 Trillium camschatcense
+ Anthers 3--4 mm, shorter than or equaling filaments   2 Trillium tschonoskii
3 (1) Outer tepals similar in shape and size to inner ones, 1.5--2 mm wide; peduncle 2--3 mm   3 Trillium govanianum
+ Outer tepals quite different in shape and size from inner ones, 10--12 mm wide; peduncle 12--14 cm   4 Trillium taiwanense

Lower Taxa


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