心叶虎耳草 xin ye hu er cao

Hirculus cardiophyllus (Franchet) Losinskaja.

Herbs perennial, 16-36 cm tall. Stem glabrous proximally, shortly dark brown glandular hairy distally. Basal leaves caducous by anthesis; basal and proximal cauline leaves with petiole 0.7-6 cm, abaxially and marginally brown villous or glandular villous; leaf blade cordate to ovate-cordate, 1.6-4.5 × 1.1-3.2 cm, abaxially and marginally brown villous or glandular villous, base cordate, apex acute; distal cauline leaves with petiole 1-10 mm, brown glandular villous, leaf blade ovate to lanceolate, 1.3-3.2 × 0.5-1.7 cm, abaxially and marginally glandular pilose, adaxially glabrous or glandular pilose, base cuneate or rounded, apex acute or subacuminate; most distal cauline leaf glandular villous and shortly glandular hairy at margin. Cyme compact, 1.5-6(-15) cm, 4-13-flowered; pedicels 0.5-2.5 cm, shortly dark brown glandular hairy. Sepals reflexed, ovate or subelliptic to suboblong, 3-4 × 1.7-2.1 mm, abaxially and marginally dark brown glandular hairy, veins 3, not confluent at apex, apex obtuse. Petals yellow, elliptic to narrowly ovate, 6-7.5 × 2.5-3.6 mm, 6(or 7)-callose, 3-5-veined, base subcordate to rounded, with a claw 0.5-1 mm, apex obtuse or acute. Stamens 4.5-5.5 mm. Ovary subsuperior, ovoid, 2.5-3 mm; styles 1-1.5 mm. Fl. and fr. Jul-Oct. 2n = 48*.

* Forests, forest margins, fields on slopes; 2500-4300 m. C and W Sichuan (Baoxing Xian, Xiangcheng Xian), NE and W Yunnan (Dali Xian, Qiaojia Xian).