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FOC | Family List | FOC Vol. 10 | Fabaceae | Indigofera

36. Indigofera caudata Dunn, Gard. Chron., ser. 3,. 32: 210. 1902.

尾叶木蓝 wei ye mu lan

Shrubs, to 2.5 m tall. Stems brown, terete, with sparse spreading medifixed symmetrically 2-branched trichomes; young branches grayish brown, angular, with dense spreading brown subbasifixed very asymmetrically 2-branched trichomes. Stipules linear, ca. 7 mm, persistent or caducous, with spreading brown crooked basifixed trichomes. Leaves 12-18 cm, 5-11-foliolate; petiole and rachis with dense spreading brown sub­medifixed trichomes; petiole 2-3 cm; rachis trigonous, adax­ially flattened or grooved; stipels subulate, ca. 2 mm, hairy; petiolules 2-3 mm; leaflet blades opposite, ovate, elliptic, or ovate-lanceolate, 2.7-8 × 1.7-3.2 cm, papery, abaxially with appressed brown medifixed trichomes, adaxially glabrous, mid­vein abaxially obviously prominent and adaxially impressed, secondary veins 6-9 on each side of midvein, base rounded to cuneate, apex acute to acuminate and mucronate. Racemes 12-20 cm; peduncle 1.5-2 cm, with spreading brown asymmetri­cally crooked trichomes; bracts bristlelike, 4-6 mm, abaxially with brown trichomes. Pedicel ca. 1 mm but to 2 mm and deflexed in fruit. Calyx campanulate, 2-3 mm, with appressed medifixed trichomes; tube 1.5(-2) mm; teeth triangular, 0.5-1 mm. Corolla white; standard broadly ovate, 7-8 × ca. 5 mm, outside with appressed brown trichomes, base truncate, apex obtuse; wings as long as standard; keel 7-8 mm, outside hairy, spurred. Stamens 6-8 mm; anthers ovoid, glabrous. Ovary hairy or glabrous. Legume brown, cylindric, 5-6.5 cm, with dense appressed brown medifixed trichomes, sutures thickened; endo­carp blotched. Seeds 11 or 12 per legume. Fl. Aug-Oct, fr. Oct-Dec.

Mountain slopes, valleys, trailsides, scrub, woodlands; 600-2000 m. Guangxi, S Guizhou, S Yunnan [N Laos].


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