Botanical name: Aphragmus minutus    Family: Brassicaceae (Mustard family)
Synonyms: Pegaeophyton minutum, Pegaeophyton garhwalense

Minute Rock-Cress is a really minute herb with slender, branched stem 0.75-2 mm in diameter. Tiny flowers have petals white, lilac, or violet, broadly obovate or nearly round, 2-3 x 1.5-2.5 mm, tapering to clawlike base 0.7-1.5 mm. Filaments dilated at base, 1-1.5 mm; anthers broadly ovate or nearly round, 0.3-0.4 mm. Sepals are broadly ovate, 1.2-2 x 0.8-1.2 mm, free, hairless. Leaf-stalks are 5-10 mm, blade obovate, spoon-shaped, ovate, oblong, or inverted-lanceshaped, 1-4 x 1-1.5 mm, somewhat fleshy, above sparsely finely velvet-hairy, rarely hairless, below hairless, base wedge-shaped or somewhat narrowed, margin entire, tip blunt to almost rounded. Minute Rock-Cress is found on mossy wet ledges, hillsides, mossy granite or boulders, steep grassy slope, at altitudes of 3700-4200 m, from Himalaya to Tibet and N. Myanmar. Flowering: May-July.

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The flower labeled Minute Rock-Cress is ...