天台猪屎豆 tian tai zhu shi dou

Herbs, perennial, 6-12 cm tall, with appressed rubiginous trichomes. Stipules absent. Leaves simple; petiole ca. 1 mm; leaf blade narrowly oblong, 4-10 × 1-2 mm, with dense white papillae and appressed rubiginous trichomes. Racemes termi­nal, 1.5-3.5 cm, 3-7-flowered; bracts linear, ca. 1 mm. Pedicel 1.5-2 mm; bracteoles linear, ca. 1.5 mm. Calyx subcam­panulate, 5-6 mm, deeply 5-lobed, with appressed trichomes and ciliate margins; lobes narrowly lanceolate, 4-5 mm, all similar. Corolla pale yellow when dry, exserted from calyx; standard ovate, ca. 5 × 3 mm, midline abaxially with trichomes, base with claw ca. 0.5 mm, with 2 pulvinate callosities, apex rounded; wings oblong, ca. 4 × 1.5 mm; keel ± as long as stan­dard, incurved above middle, beak not twisted. Ovary sessile, glabrous. Legume ellipsoidal, 6-8 × 4-4.5 mm, glabrous. Fl. and fr. Sep.

● Zhejiang.

Crotalaria tiantaiensis is known to us only from the protologue based on a single collection. Apparently, it is very similar vegetatively to the preceding species.