学名(拉丁名) | Taphrospermum |
中文名 | 沟子荠属 |
命名人 | C. A. Mey. |
中文科名 | 十字花科 |
类型 | genus |
拉丁科名 | Cruciferae |
学名(拉丁名) | Taphrospermum |
中文名 | 沟子荠属 |
类型 | genus |
拉丁科名 | Brassicaceae |
学名(拉丁名) | Taphrospermum |
中文名 | 沟子荠属 |
中文科名 | 十字花科 |
类型 | genus |
拉丁科名 | Brassicaceae |
学名(拉丁名) | Taphrospermum |
发表年份 | 1831 [1831](年) |
类型 | genus |
拉丁科名 | Brassicaceae |
1 | At least some of the lowermost cauline leaves verticillate, other leaves opposite and/or alternate. | (2) |
1 + | All leaves alternate. | (4) |
2 (1) | Plants densely hirsute throughout with trichomes 0.5-1 mm (6) | T. tibeticum |
2 (1) + | Plants glabrous or puberulent with papillae 0.05-0.2 mm. | (3) |
3 (2) | Petals broadly obovate, (7-)8-9(-10) × (3.5-)4.5-6 mm; seeds foveolate; sepals caducous, margin ciliolate; septum absent (4) | T. verticillatum |
3 (2) + | Petals narrowly obovate, 3-3.5 × 1.5-2 mm; seeds papillate; sepals persistent, margin not ciliolate; septum complete (5) | T. lowndesii |
4 (1) | At least some leaves dentate; fruit oblong or ovate, latiseptate (2) | T. himalaicum |
4 (1) + | Leaves entire or rarely repand; fruit narrowly conical or obcordate, angustiseptate at least basally. | (5) |
5 (4) | Fruit obcordate, not torulose, (4-)5-7 mm wide; septum absent; cotyledons accumbent (3) | T. fontanum |
5 (4) + | Fruit narrowly concial, torulose, (1.8-)2-2.5(-3) mm wide; septum complete or rarely reduced to a rim; cotyledons incumbent (1) | T. altaicum |
80. 沟子荠属——Taphrospermum C. A. Mey.
C. A. Mey. in Ledeb. Fl. Alt. 3: 172. 1831; O. E. Schulz in Engl. Pflanzenr. 86 (4. 105): 27. 1924. et in Engl. et Prantl, Nat. Pflanzenfam. 2 Aufl. 17b: 585. 1936.
多年生章本,无毛,分枝不多。叶为单叶,具柄。花腋生或呈总状花序,花小;外轮萼片宽长圆形,内轮萼片卵形,顶端均钝圆,边缘膜质,基部均成囊状;花瓣淡黄色,卵圆形,顶端微缺,基部具短爪;雄蕊花丝宽,花药近方形,略钝;侧蜜腺环状,中蜜腺小瘤状,二者汇合;雌蕊花柱细而短,柱头小,压扁。短角果圆筒状钻形,略呈四棱状;隔膜柔软,有1不明显的脉,有时穿孔;果瓣膜质、半透明,有明显中脉与细弱网状脉,基部囊状。种子每室1行,种子大,表面有纵行排列的小点组成的沟纹;种柄宽而短;子叶扁平,背倚胚根。
2种,1变种,产中亚;我国有1种,1变种,产甘肃、青海、新疆及西藏。
本属模式种:沟子荠 Taphrospermum altaicum. C. A. Mey.