山菥蓂 shan xi ming

Noccaea cochleariformis (de Candolle) Á.. Löve & D. Löve; N. exauriculata (Komarov) Czerepanov; Thlaspi exauriculatum Komarov.

Herbs perennial, (5-)8-25(-45) cm tall, glabrous throughout, glaucous. Stems erect or ascending, simple. Basal leaves rosulate; petiole 0.5-1.5(-2.5) cm; leaf blade spatulate, oblong, or ovate, 0.6-2.8(-3.5) cm × 3-11(-15) mm, base obtuse, margin entire, apex rounded. Middle cauline leaves sessile, oblong or ovate, 0.6-2.8(-3.5) cm × 4-12(-16) mm, base auriculate or amplexicaul, margin repand or entire, rarely denticulate, apex obtuse or acute. Fruiting pedicels (2-)4-8 mm, slender, divaricate, straight. Sepals oblong, 2-3 × 1-1.5 mm, not saccate, margin white. Petals white, spatulate, 5-7 × 2-3 mm, apex rounded. Filaments 2.5-3.5 mm; anthers oblong, 0.6-0.8 mm. Ovules 4-8(-10) per ovary. Fruit narrowly obovate or obovate-obcordate, rarely oblong-obovate, (5-)6-10(-13) × 4-6 mm, base subacute, apex emarginate and apical notch 1-2 mm deep; apical wings 1-2.5 mm wide; style (0.2-)0.7-1.5(-2) mm. Seeds brown, ovate-oblong, 1.2-1.8 × 0.9-1.1 mm, obscurely reticulate. Fl. May-Jun, fr. Jun-Aug. 2n = 56, 84.

Grassy slopes, roadsides, meadows; 600-3700 m. Gansu, Hebei, Heilongjiang, Jilin, Liaoning, Nei Mongol, Xinjiang, Xizang [Kashmir, Kazakhstan, Mongolia, Pakistan, Russia, Tajikistan].

Thlaspi cochleariforme was reduced in FRPS to the synonymy of T. thlaspioides (Pallas) Kitagawa, but the latter is a synonym of T. alpestre Linnaeus, a species restricted to Europe. The records in FRPS and Fl. Xinjiang. (2(2): 83. 1995) of Thlaspi ferganense N. Busch from Xinjiang are based on misidentified plants of T. cochleariforme.