23. Tricyrtis Wallich, Tent. Fl. Napal. 61. 1826.
[nom. cons.]
油点草属 you dian cao shu
Chen Xinqi (陈心启 Chen Sing-chi); Hiroshi Takahashi
Compsoa D. Don, nom. rej.
Herbs perennial, with short or sometimes long and creeping rhizomes. Stems usually erect or ascending, sometimes branched distally. Leaves cauline, alternate, subsessile, usually ± amplexicaul. Inflorescence a thyrse or thyrsoid, rarely a raceme. Flowers bisexual, solitary, showy. Perianth campanulate or trumpet-shaped. Tepals 6, free, white or yellow with purplish spots, usually recurved or reflexed distally, usually caducous; outer ones saccate or shortly spurred. Stamens 6, inserted at base of tepals; filaments slightly flattened, proximally connivent to form a short tube; anthers dorsifixed, versatile, extrorse. Ovary 3-loculed; ovules many per locule. Style columnar; stigmatic lobes 3, spreading, apically cleft. Fruit a capsule, broadly cylindric, 3-angled, septicidal. Seeds many, ovate to orbicular, flattened, small.
About 18 species: from the Himalayas to E Asia; nine species (six endemic) in China.
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| 1 |
Flowers or inflorescences all axillary |
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7 Tricyrtis suzukii |
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Flowers or inflorescences terminal or sometimes also axillary. |
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(2) |
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| 2 (1) |
Ovary and capsule densely pubescent |
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4 Tricyrtis lasiocarpa |
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Ovary and capsule glabrous or subglabrous. |
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(3) |
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| 3 (2) |
Stems subglabrous. |
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(4) |
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Stems mostly pubescent; leaves not usually ovate, apex acute or acuminate. |
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(6) |
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| 4 (3) |
Flowers pale yellow with red-purple spots |
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9 Tricyrtis latifolia |
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Flowers white or greenish white with purple spots. |
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(5) |
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| 5 (4) |
Tepals spreading obliquely outward |
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5 Tricyrtis ovatifolia |
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Tepals spreading horizontally or at an angle of ca. 45° |
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8 Tricyrtis viridula |
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| 6 (3) |
Leaves (4--)6--10 cm wide, adaxially hispidulous, proximal leaves rounded or cordate at base. |
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(7) |
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Leaves 2.5--4(--5) cm wide, adaxially glabrescent, proximal leaves narrowed and subcuneate at base. |
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(8) |
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| 7 (6) |
Tepals reflexed at full anthesis |
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1 Tricyrtis macropoda |
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Tepals spreading horizontally or at an angle of ca. 45° |
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2 Tricyrtis pilosa |
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| 8 (6) |
Plants with creeping, long rhizomes; leaves elliptic |
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6 Tricyrtis stolonifera |
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Plants without creeping, long rhizomes; leaves oblanceolate to obovate |
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3 Tricyrtis formosana |
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List of lower taxa
