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FOC | Family List | FOC Vol. 8 | Brassicaceae

25. Platycraspedum O. E. Schulz, Repert. Spec. Nov. Regni Veg. Beih. 12: 386. 1922.

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.

1 Fruit 4-angled, narrowly 4-winged, not torulose, 2.5-3 mm wide; petals 4-6 × 2-3 mm; seeds (2.8-)3-3.5 mm   1 P. tibeticum
+ Fruit terete, wingless, torulose, ca. 1.5 mm wide; petals 3-4 × 1-1.5 mm; seeds 2-2.5 mm   2 P. wuchengyii

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