无斑虎耳草 wu ban hu er cao

Saxifraga omphalodifolia var. callosa C. Y. Wu; S. omphalodifolia var. retusopetala J. T. Pan.

Herbs perennial, 22-34 cm tall. Stem zigzagged, densely dark brown crisped villous, eglandular proximally, glandular distally. Basal leaves caducous by anthesis, petiolate; leaf blade cordate. Cauline leaves with petiole 0.7-3.5 cm, glandular villous; leaf blade usually cordate to ovate-cordate, 1.5-3.7 × 2-3.4 cm, glandular hispid, base cordate, apex subacute. Cyme paniculate, 7-8.5 cm, 9-11-flowered; pedicels glandular hispid. Sepals reflexed, elliptic to ovate, ca. 4 × 2.5 mm, abaxially and marginally glandular hairy or margin glabrous, veins 3, not confluent at apex, margin membranous, apex obtuse. Petals yellow, narrowly ovate to suboblong, 5.4-7.2 × 2-3.4 mm, obscurely 6-callose, or 4-8-callose, or not callose, 3-5-veined, base contracted into a claw 0.6-0.7 mm, apex obtuse or retuse. Stamens 4.5-5.5 mm. Ovary subsuperior, subovoid, ca. 2.5 mm; styles ca. 1 mm. Fl. and fr. Jul-Sep.

* Pinus forests, alpine meadows; 3800-4200 m. SW Sichuan, Xizang, Yunnan.

The varieties recognized in FRPS, which are treated as synonyms in the present account, are based on minor variations in petal callosities and hairiness of the sepal margin.