foc
《中国植物志》英文修订版
Flora of China
  FOC Vol.8 (2001)              | Family List  Brassicaceae  PDF Dilophia  PDF   |  eFloras.org Link Font:+ Big | - Small
   24. Dilophia  Thomson
双脊荠属   shuang ji ji shu
  

  

Herbs perennial. Trichomes absent or simple. Roots fleshy, conical. Stems erect, simple underground, branched aboveground. Basal leaves sessile, fleshy, rosulate, simple, entire or sinuate or dentate. Cauline leaves sessile, attenuate and not auriculate, entire. Corymbs several to many flowered, bracteate or ebracteate, simple or compound, not elongated in fruit. Fruiting pedicels ascending or divaricate. Sepals broadly ovate, persistent, ascending, glabrous or puberulent, base of lateral pair not saccate. Petals white or pink, longer than sepals; blade obovate or spatulate, apex obtuse or emarginate; claw obscurely to distinctly differentiated from blade. Stamens 6, slightly spreading, slightly tetradynamous; filaments not dilated at base; anthers ovate, apiculate at apex. Nectar glands confluent and subtending bases of all filaments. Ovules 4-12 per ovary. Fruit dehiscent silicles, obcordate, angustiseptate, sessile; valves membranous or thin papery, obscurely veined, glabrous or puberulent, rounded, smooth, apically gibbous and cristate; replum strongly flattened, base much broader; septum complete or perforated; style to 0.5 mm, included in apical notch of fruit; stigma capitate, entire. Seeds wingless, broadly oblong or ovoid, slightly flattened; seed coat minutely reticulate, not mucilaginous when wetted; cotyledons incumbent or oblique.

Two species: Bhutan, China, India, Kashmir, Kyrgyzstan, Nepal, Sikkim, Tajikistan; two species (one endemic) in China.

  
1Petals broadly obovate, 4.5-6 × 2-3 mm; anther apicula ovate, 0.2-0.5 mm, apex rounded; seeds 2-4 per fruit, 1.8-2.2 × 0.9-1.2 mm1  D. ebracteata    无苞双脊荠
+Petals spatulate or spatulate-linear, 1.8-2.5(-3.2) × 0.5-1(-1.5) mm; anther apicula triangular, 0.05-0.1 mm, apex acute; seeds (2-)4-8(-12) per fruit, 0.7-1.1(-1.5) × 0.5-6 mm2  D. salsa    盐泽双脊荠
   
   Lower Taxon
  • Dilophia ebracteata  Maximowicz  无苞双脊荠
  • Dilophia salsa  Thomson  盐泽双脊荠