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

2. Tetracme recurvata Bunge, Arbeiten Naturf. Vereins Riga. 1: 158. 1848.

弯角四齿芥 wan jiao si zhi jie

Herbs (4-)10-30(-40) cm tall, tomentose throughout. Stems ascending, several branched at or near base. Basal and lowermost cauline leaves with petioles 0.3-2 cm; leaf blade oblong-linear or linear-lanceolate, (1-)2-5(-6) cm × 3-8 mm, base attenuate, margin pinnatifid, pinnatipartite, or sinuate-dentate, apex obtuse. Upper cauline leaves similar to basal, smaller, subsessile, sometimes entire. Fruiting pedicels 1-2 mm, subclavate, stout, about as wide as fruit base, appressed to rachis. Sepals ovate, 0.6-1 mm, distally white and petaloid. Petals white, spatulate, 0.8-1(-1.2) × 0.4-0.5 mm, attenuate to clawlike base. Filaments white, 0.5-0.7 mm; anthers ovate, 0.2-0.3 mm. Ovules 4-8 per ovary. Fruit linear, (4-)6-8(-10) × 0.8-1 mm, compressed, not torulose, base appressed to rachis, distal half arcuate or recurved; valves tomentose, exclusively with stellate trichomes, apex extend beyond horns into flattened, triangular, stylelike part 1-2 mm; subapical horns (2.5-)4-7(-8) mm, divaricate-reflexed, strongly recurved; style distinct, to 1 mm. Seeds yellow or light brown, oblong, 1.2-1.6 × 0.5-0.7 mm. Fl. and fr. Apr-Jun.

Sandy deserts, plains; 200-600 m. Xinjiang [Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, Uzbekistan; SW Asia].


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