foc
《中国植物志》英文修订版
Flora of China
  FOC Vol.8 (2001)              | Family List  Brassicaceae  PDF Sinapis  PDF   |  eFloras.org Link Font:+ Big | - Small
   3. Sinapis  Linnaeus
白芥属   bai jie shu
  

  

Herbs annual or rarely perennial. Trichomes absent or simple. Stems erect or ascending, often branched apically, leafy. Basal leaves petiolate, not rosulate, simple, lyrate, pinnatifid, pinnatisect, bipinnatisect or/and dentate. Cauline leaves petiolate or sessile, not auriculate, entire, dentate, or shallowly lobed. Racemes ebracteate, elongated considerably in fruit. Fruiting pedicels slender or thickened, erect, ascending, divaricate, or reflexed. Sepals oblong or linear, spreading or reflexed, not saccate. Petals yellow, spreading; blade obovate, apex obtuse or emarginate; claw subequaling sepals. Stamens 6, tetradynamous; anthers oblong, obtuse at apex. Nectar glands 4, distinct; median pair ovoid; lateral pair prismatic, flat, or rarely lobed. Ovules 4-20 per ovary. Fruit dehiscent siliques, linear, lanceolate, or oblong, terete, somewhat 4-angled, or latiseptate, sessile, segmented; valvular segment dehiscent, few to many seeded, longer or shorter than terminal segment, torulose; valves with 3-7, prominent, longitudinal veins, thin or thick and obscurely veined; terminal segment indehiscent, seedless or 1- or 2-seeded, flattened and ensiform, or terete and conical or subulate, sometimes corky; replum rounded; septum complete, membranous; style distinct; stigma capitate, 2-lobed. Seeds uniseriate, wingless, globose, plump or rarely slightly flattened; seed coat reticulate, mucilaginous or not when wetted; cotyledons conduplicate.

Seven species: Mediterranean region, especially N Africa; two species in China.

  
1Fruit lanceolate, terminal segment strongly compressed, ensiform; fruiting pedicels divaricate; fruit valves hispid with subsetose trichomes mixed with much shorter, more slender ones1  S. alba    白芥
+Fruit linear, terminal segment terete, conical or subulate; fruiting pedicels ascending or suberect; fruit valves glabrous or rarely sparsely pubescent with 1 kind of trichome2  S. arvensis    新疆白芥
   
   Lower Taxon
  • Sinapis alba  Linnaeus  白芥
  • Sinapis arvensis  Linnaeus  新疆白芥