三芒虎耳草 chuan dian hu er cao

Herbs perennial, densely cespitose, 2.5-5.5 cm tall. Stem glandular pilose. Basal leaves with petiole 2.7-8 mm, margin brown glandular or eglandular villous; leaf blade narrowly elliptic to oblong or lanceolate, 3.5-7 × 0.9-1.5 mm, ± hispid on both surfaces or adaxially only, margin brown glandular or eglandular villous, apex 1-aristate. Cauline leaves narrowly lanceolate or linear, 4-10 × 0.9-1.2 mm, adaxially and marginally ± brown glandular villous, apex 1-aristate; proximal leaves with petiole ca. 1.4 mm, brown glandular villous at margin, distal leaves sessile. Flower solitary; pedicel slender, 0.9-2.5 cm, brown glandular pilose. Sepals spreading, subelliptic, 2.2-3 × 1-2 mm, abaxially glandular hairy, veins 3, not confluent at apex, margin glabrous, apex erose. Petals yellow, oblong to narrowly ovate, 5-5.5 × 2.2-2.5 mm, 2-callose near base, 3-5-veined, base contracted into a claw ca. 0.5 mm, apex subobtuse. Stamens 3.5-4 mm. Ovary subsuperior, broadly ovoid, ca. 2 mm; styles 1.5-2.5 mm. Fl. Jul-Aug.

* Alpine meadows, rock crevices; 4100-4700 m. W Sichuan, NW Yunnan.

In FRPS, this species was treated under the name Saxifraga trinervia, which appears, however, to be a different taxon (possibly S. hypericoides var. aurantiascens). Two synonyms were cited in FRPS under S. trinervia: S. peraristulata and S. triaristulata. Careful scrutiny of the types and other material shows that the name S. peraristulata should be applied to the taxon described above, whereas the name S. triaristulata refers to another species in the group with rufous villous pedicels and is described later in the present account.