黑虎耳草 hei hu er cao

Micranthes atrata (Engler) Losinskaja.

Stem simple or cespitose, 7-23 cm tall, sparsely white crisped villous. Petiole 1-2 cm; leaf blade ovate to broadly so, 1.2-2.5 × 0.8-1.8 cm, both surfaces subglabrous, margin crenate-serrate, ciliate, apex subobtuse or acute. Inflorescence usually cylindric, 3-15 cm, 7-25-flowered; pedicels pilose. Sepals reflexed, ovate or triangular-ovate, 2.4-3.2 × 1.5-2 mm, glabrous, veins 3-7, confluent into a verruca at apex, apex acute or subacuminate. Petals white, ovate to elliptic, 2.8-4 × 1.8-2.2 mm, base contracted into a claw 0.8-1 mm, 5-7-veined, apex obtuse or retuse. Stamens 3-5.9 mm; filaments subulate; anthers dark purple. Ovary up to 1/3 inferior, dark purple, broadly ovoid, 1-3.4 mm, with a broad, annular nectary; styles 1-2.5 mm. Capsule ovoid, ca. 7 mm; styles erect. Fl. and fr. Jul-Aug.

* Alpine meadows, rock crevices; 3000-4200 m. SE Gansu, NE Qinghai.