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FOC | Family List | FOC Vol. 8 | Brassicaceae

88. Taphrospermum C. A. Meyer in Ledebour, Fl. Altaic. 3: 172. 1831.

沟子荠属 gou zi ji shu

Taphrospermum altaicum

Credit: Al-Shehbaz

Glaribraya H. Hara.

Herbs biennial or perennial. Trichomes simple, rarely absent. Roots often fleshy, narrowly fusiform, basally with a whorl of caducous or persistent scalelike leaves. Stems prostrate, ascending, or erect. Basal leaves petiolate, not rosulate, simple, entire. Cauline leaves petiolate, entire, lowermost whorled or alternate. Racemes many flowered, bracteate throughout or rarely only basally. Fruiting pedicels ascending or divaricate, straight or recurved. Sepals oblong, erect, glabrous or subapically pubescent, base of lateral pair not saccate. Petals white, longer than sepals; blade obovate or broadly so, apex rounded or emarginate; claw obscure. Stamens 6, subtetradynamous; filaments of median pairs dilated at base; anthers ovate, apex rounded. Nectar glands confluent, subtending bases of all stamens. Ovules to 12 per ovary. Fruit dehiscent siliques or silicles, cylindric, narrowly conical, or obcordate, ovate, or oblong, angustiseptate, terete, or latiseptate, sessile or subsessile; valves distinctly veined, glabrous or papillate, torulose or smooth; replum widely flattened throughout or only basally; septum complete, rarely absent or perforate and reduced to a rim; style to 3 mm; stigma capitate, entire. Seeds uniseriate or biseriate, wingless, oblong, plump or flattened; seed coat foveolate or papillate, not mucilaginous when wetted; cotyledons incumbent, oblique, or accumbent.

Seven species: Bhutan, China, India, Kazakhstan, Kyrgyzstan, Mongolia, Nepal, Russia, Tajikistan; six species (three endemic) in China.

Taphrospermum platypetalum Schrenk, which is endemic to Soongaria in Kazakhstan, might also be present in neighboring Xinjiang. It has racemes bracteate only basally, glabrous sepals, and cylindric fruit.

1 At least some of the lowermost cauline leaves verticillate, other leaves opposite and/or alternate.   (2)
+ All leaves alternate.   (4)
2 (1) Plants densely hirsute throughout with trichomes 0.5-1 mm   6 T. tibeticum
+ 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
+ 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
+ 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
+ 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

Lower Taxa


Related Objects  
  • Al-Shehbaz, Ihsan A. 2000. A revision of the Himalayan and Central Asian Genus Taphrospermum (Brassi
  • Web Page
  • PDF File
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