foc
《中国植物志》英文修订版
Flora of China
  FOC Vol.8 (2001)              | Family List  Brassicaceae  PDF Pegaeophyton  PDF   |  eFloras.org Link Font:+ Big | - Small
   44. Pegaeophyton  Hayek & Handel-Mazzetti
单花荠属   dan hua ji shu
  

  

Herbs perennial, with simple or branched caudex. Trichomes absent or simple. Stems reduced to tiny portions added annually to apex of caudex or its branches. Basal leaves fleshy or not, rosulate, simple, entire or toothed. Cauline leaves absent. Flowers solitary, borne on pedicels from axils of rosette leaves. Fruiting pedicels ascending, straight, reflexed in geocarpic taxa. Sepals broadly ovate or oblong, ascending or spreading, glabrous or pubescent, base not saccate. Petals white, pink, purple, blue, or rarely bright yellow, longer than sepals; blade broadly obovate or suborbicular, rarely spatulate, apex rounded or subemarginate; claw often absent. Stamens 6, erect or spreading, subequal; filaments dilated at base; anthers ovate or oblong, obtuse at apex. Nectar glands confluent, subtending bases of all stamens. Ovules 2-15 per ovary. Fruit dehiscent silicles, rarely siliques, oblong, ovate, orbicular, ovoid, or globose, terete, latiseptate, or angustiseptate, geocarpic or not, sessile or stipitate; valves membranous or papery, not veined or obscurely veined, smooth, glabrous or pubescent; replum flattened; septum absent; style obsolete or to 3 mm, subconical; stigma discoid, entire. Seeds uniseriate, wingless, oblong, ovate, or suborbicular, plump or flattened; seed coat obscurely reticulate, not mucilaginous when wetted; cotyledons accumbent.

Six species: Bhutan, China, India, Kashmir, Myanmar, Nepal, Pakistan, Sikkim; four species (one endemic) in China.

  
1Fruit angustiseptate, geocarpic; valves ± carinate; fruiting pedicel strongly recurved; replum narrow, wingless; gynophore absent4  P. angustiseptatum    窄隔单花荠
+Fruit subterete or latiseptate; valves flat; fruiting pedicels usually straight; replum wide, winged; gynophore present.(2)
   
2(1)Fruiting pedicels pubescent along 1 side, persisting for more than one season; fruit narrowly oblong; sepals apically ciliate1  P. minutum    小单花荠
+Fruiting pedicels glabrous or distally pubescent on all sides, not persistent; fruit oblong, ovate, orbicular, ovoid, or subglobose; sepals not ciliate.(3)
   
3(2)Fruit ovoid or subglobose; valves membranous, puberulent apically; sepals 1.1-1.3 mm; petals 1.6-2(-2.5) mm; seeds plump, 1-1.1(-1.3) × 0.5-0.6(-0.8) mm3  P. nepalense    尼泊尔单花荠
+Fruit oblong, orbicular, or ovate, flattened; valves papery, glabrous; sepals (2-)2.5-6(-10) mm; petals (3.5-)5-12(-15) mm; seeds flattened, 1.5-3.5(-4) × 1-2.5(-3) mm2  P. scapiflorum    单花荠
   
   Lower Taxon
  • Pegaeophyton minutum  H. Hara  小单花荠
  • Pegaeophyton scapiflorum  (J. D. Hooker & Thomson) C. Marquand & Airy Shaw  单花荠
  • Pegaeophyton scapiflorum subsp. scapiflorum    单花荠(原亚种)
  • Pegaeophyton scapiflorum subsp. robustum  (O. E. Schulz) Al-Shehbaz et al.  粗壮单花荠
  • Pegaeophyton nepalense  Al-Shehbaz et al.  尼泊尔单花荠
  • Pegaeophyton angustiseptatum  Al-Shehbaz et al.  窄隔单花荠