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FOC | Family List | FOC Vol. 8 | Brassicaceae | Dontostemon

9. Dontostemon pinnatifidus (Willdenow) Al-Shehbaz & H. Ohba, Novon. 10: 96. 2000.

羽裂花旗杆 yu lie hua qi gan

Dontostemon pinnatifidus

Credit: Photo: Al-Shehbaz

Herbs annual or biennial, (5-)10-40(-60) cm tall, glandular. Stems erect, often simple, branched above. Basal and lowermost cauline leaves sparsely to densely pubescent, with simple trichomes to 2 mm, glandular; petiole 2-10(-15) mm; leaf blade lanceolate, elliptic, or oblong, (0.7-)1.5-4.5(-6) cm × (1.5-)3-10(-15) mm, base attenuate or cuneate, margin dentate, serrate, or pinnatifid, ciliate, apex acute; middle and upper leaves linear and entire, or elliptic or lanceolate and dentate. Fruiting pedicels ascending or divaricate, (0.3-)0.5-1.5(-2.3) cm, glandular. Sepals oblong, 2-3(-4) × (0.8-)1-1.5 mm, glabrous or sparsely pubescent apically. Petals white, broadly obovate, (5-)6-8 × (2.5-)3-4(-5) mm, apex emarginate; claw 1-3 mm. Filaments of median stamens 2-3 mm, free, abruptly expanded and toothed below anther; filaments of lateral stamens 1.5-2.5 mm, slender; anthers oblong-ovate, 0.6-0.8 mm, apiculate. Ovules 16-60 per ovary. Fruit (1.1-)1.5-4(-5) cm × (0.8-)1-1.3 mm, straight, torulose, terete; valves glandular, with prominent midvein and marginal veins; style 0.5-1.5 mm; stigma slightly lobed. Seeds brown, oblong-ovate or narrowly oblong, 1.1-2.3 × 0.7-1 mm, narrowly margined distally; cotyledons obliquely accumbent or incumbent. Fl. and fr. Jun-Aug.

Grassy plains, hillsides, rocky slopes, roadsides, sand dunes, flood plains, grasslands; 1100-4600 m. Gansu, Hebei, Heilongjiang, Nei Mongol, Qinghai, Shandong, Sichuan, Xinjiang, Xizang, Yunnan [India, Mongolia, Nepal, Russia].

1 Middle cauline leaves elliptic or lanceolate, serrate, dentate, or rarely pinnatifid, (3-)5-10(-15) mm wide; seeds oblong or ovate, 1.1-1.8 mm; cotyledons obliquely accumbent or obliquely incumbent; plants pilose, moderately to densely glandular   9a subsp. pinnatifidus
+ Middle cauline leaves linear to filiform, entire, 0.5-1(-1.5) mm wide; seeds narrowly oblong, 2-2.3 mm; cotyledons incumbent; plants glabrous, very sparsely glandular   9b subsp. linearifolius

Lower Taxa


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