foc
《中国植物志》英文修订版
Flora of China
  FOC Vol.8 (2001)              | Family List  Brassicaceae  PDF Platycraspedum  PDF   |  eFloras.org Link Font:+ Big | - Small
   25. Platycraspedum  O. E. Schulz
宽框荠属   kuan kuang ji shu
  

  

Herbs biennial or perennial. Trichomes simple. Roots fusiform, fleshy. Stems erect, short, and simple at base, with several, long, decumbent or ascending branches. Basal leaves unknown. Cauline leaves petiolate, repand-dentate or palmately lobed, the lobes not mucronate, base cordate. Racemes several flowered, bracteate throughout. Sepals oblong (median pair) or broadly ovate (lateral pair), deciduous, glabrous, unequal, base of lateral pair saccate, margin membranous. Petals white, narrowly obovate or subelliptic. Stamens 6, tetradynamous; filaments white; median pair strongly flattened, laterally 1-toothed; anthers oblong. Nectar glands 2, annular, lateral; median glands absent. Ovules 3-9 per ovary. Fruit dehiscent siliques, linear or oblong, terete or 4-angled; valves obscurely veined or with a prominent, narrowly winged midvein, keeled or not; gynophore short and rarely to 1 mm; replum flattened, winged or wingless; septum absent; style to 1.5 mm; stigma 2-lobed. Seeds uniseriate, wingless, oblong or ovate, flattened; seed coat minutely reticulate, not mucilaginous when wetted; cotyledons accumbent.

* Two species.

  
1Fruit 4-angled, narrowly 4-winged, not torulose, 2.5-3 mm wide; petals 4-6 × 2-3 mm; seeds (2.8-)3-3.5 mm1  P. tibeticum    宽框荠
+Fruit terete, wingless, torulose, ca. 1.5 mm wide; petals 3-4 × 1-1.5 mm; seeds 2-2.5 mm2  P. wuchengyii    吴氏宽框荠
   
   Lower Taxon
  • Platycraspedum tibeticum  O. E. Schulz  宽框荠
  • Platycraspedum wuchengyii  Al-Shehbaz et al.  吴氏宽框荠