远志木蓝 yuan zhi mu lan

Corchorus oenotheroides H. Léveillé ["onotheroides"]; Indigofera changensis Craib; I. oenotheroides (H. Léveillé) Lauener; I. polygaloides Gagnepain.

Herbs, perennial, erect, to 60 cm tall. Roots tuberous. Stems striate, with appressed white medifixed symmetrically 2-branched trichomes. Stipules narrowly triangular, ca. 2 mm. Leaves simple; petiole 3-4 mm; leaf blade narrowly elliptic to obovate, 2.5-5.5(-7) × 0.7-2.5 cm, both surfaces with ap­pressed medifixed trichomes, abaxially with sparse deciduous disk-shaped glands, secondary veins 10 or 11 on each side of midvein, base cuneate, apex acute and with a ca. 0.5 mm mucro. Racemes 1-2(-3) cm, very densely flowered; bracts narrowly triangular, 2-2.5 × ca. 0.5 mm. Peduncles, pedicels, bracts, and calyces all with very dense appressed medifixed tri­chomes. Pedicel 1-1.5 mm. Calyx tube ca. 1 mm; teeth nar­rowly triangular, 1-1.5 × ca. 0.5 mm. Corolla red; standard elliptic, 4-5 × 2.5-3 mm, outside with very dense appressed medifixed trichomes; wings 3.5-4 × ca. 1 mm, glabrous; keel 4-4.5 × ca. 2 mm, outside surface with very dense appressed trichomes. Stamens 3-4 mm; anthers glabrous. Ovary hairy, with 5 or 6 ovules. Legume cylindric, descending, straight, 1.1-1.4 cm × 1.5-2 mm, with dense appressed medifixed trichomes; style usually persistent and then glands still visible; endocarp not blotched. Seeds 3-5 per legume, yellowish brown, ovoid, ca. 1.2 × 1 mm. Fl. Jun-Sep, fr. Sep-Nov.

Trailsides, open grasslands, foot of hills; 100-1000 m. Guang­dong, Guangxi, Guizhou, Yunnan [Cambodia, Laos, Myanmar, Thai­land, Vietnam].