条叶庭荠 tiao ye ting ji

Alyssum cupreum Freyn & Sintenis; A. linifolium var. cupreum (Freyn & Sintenis) T. R. Dudley; A. linifolium var. tehranicum Bornmüller; A. serpyllifolium Desfontaines; Meniocus australasicus Turczaninow; M. linifolium (Stephan ex Willdenow) de Candolle.

Herbs annual, (4-)10-30(-40) cm tall, canescent, with appressed, sessile, (7-)10-18-rayed stellate trichomes. Stems erect, ascending, or rarely prostrate, simple or branched near base, always branched above. Cauline leaves shortly petiolate or sessile; leaf blade linear-oblanceolate or linear, (0.5-)0.7-2(-3.5) cm × (0.5-)1-2.5(-3.5) mm, base attenuate, apex obtuse or acute. Fruiting pedicels divaricate or ascending, 2-5(-7) mm, slender, straight, covered with stellate trichomes. Sepals oblong, 1.2-2 × 0.4-0.5 mm, caducous, pubescent with stellate trichomes. Petals white or pale yellow, linear-oblanceolate, 1.2-2.5(-3) × 0.6-1 mm, glabrous, caducous, apex emarginate. Median filaments 1-1.5 mm, 1-toothed; lateral filaments 0.8-1.5, with an appendage 0.3-0.5 mm; anthers ovate, 0.15-0.2 mm. Ovules 4-6(-8) per locule. Fruit obovate, obovate-oblong, or broadly elliptic, (3.5-)4-7 × (2-)2.5-4(-4.5) mm, apex obtuse; valves not veined, flattened throughout, glabrous; style (0.1-)0.3-0.5 mm, slender, glabrous. Seeds 3-6(-8) per locule, oblong or ovate, 1-1.5 × 0.6-0.9 mm, biseriate, compressed, narrowly margined all around, margin to 0.1 mm wide. Fl. and fr. Apr-Jun. 2n = 16.

Roadsides, cultivated areas, plains, hillsides, steppe, rocky places; 100-2700 m. Xinjiang [Afghanistan, Kazakhstan, Kyrgyzstan, Pakistan, Russia, Tajikistan, Turkmenistan, Uzbekistan; N Africa, SW Asia, Europe; naturalized in Australia].