Sisymbrium minutiflorum J. D. Hooker & Thomson, J. Proc. Linn. Soc., Bot. 5: 158. 1861; Guillenia minutiflora (J. D. Hooker & Thomson) Bennet; Microsisymbrium minutiflorum (J. D. Hooker & Thomson) O. E. Schulz; M. minutiflorum var. dasycarpum O. E. Schulz.
Herbs (2-)4-20(-30) cm tall, sparsely to moderately pubescent with finely branched trichomes to 0.1 mm. Stems slender, branched above or rarely simple; branches filiform. Basal and lowermost cauline leaves pinnatisect, with 1 or 2 lateral lobes; petiole 5-12 mm; lobes linear, filiform, narrowly oblong, or oblanceolate-linear, (1-)3-9(-12) × 0.2-0.8(-1.3) mm, margin entire or very rarely obtusely 1-toothed, apex obtuse. Upper and middle cauline leaves 3-lobed, similar to lowermost leaves. Infrutescence axis strongly or rarely slightly flexuous. Fruiting pedicels (0.5-)3-8(-12) mm, slender or thickened, narrower or rarely nearly as wide as fruit, erect or divaricate, straight or slightly curved. Sepals oblong, (0.6-)0.8-1(-1.2) × 0.4-0.5 mm. Petals white or pink, (0.9-)1.1-1.5(-1.8) × 0.3-0.5 mm, oblanceolate, apex obtuse. Filaments white, 0.8-1.1 mm; anthers broadly ovate, ca. 0.2 mm. Fruit linear, (0.4-)0.7-1.8(-2.5) cm × 0.5-0.8 mm; valves glabrous or sparsely pubescent; style absent, obsolete, or rarely to 0.1 mm. Seeds brown, oblong, 0.9-1.1(-1.2) × 0.4-0.5(-0.6) mm. Fl. May-Aug, fr. Jun-Aug. 2n = 28.
Limestone, marble outcrops, scree slopes; 2600-4200 m. Xizang [Afghanistan, India, Pakistan, Tajikistan, Turkmenistan, Uzbekistan; SW Asia].
This species is represented in China by subsp. minutiflora; subsp. brevipedicellata (Hedge) Al-Shehbaz & O'Kane (Microsisymbrium minutiflorum var. brevipedicellatum Hedge) is restricted to N Afghanistan and adjacent Tajikistan.
