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

40. Indigofera esquirolii H. Léveillé, Repert. Spec. Nov. Regni Veg. 12: 190. 1913.

黔南木蓝 qian nan mu lan

Indigofera arborea Gagnepain (1915), not Roxburgh (1832); I. neoarborea Hu ex F. T. Wang & Tang.

Shrubs, 1-4 m tall. Stems nut-brown, terete, with round yellowish lenticels; young branches brown, angular, with dense spreading long brown or rufous subbasifixed asymmetrically 2-branched trichomes and short subsymmetrically 2-branched tri­chomes. Stipules linear, 5-8 mm, caducous, densely hairy. Leaves ca. 12 cm, 9-15-foliolate; petiole and rachis terete and adaxially grooved, indumentum same as branches; petiole 1-1.5 cm; stipels subulate, ca. 1 mm, with brown trichomes; petiolules ca. 1.5 mm, with spreading brown trichomes; leaflet blades opposite, elliptic, broadly obovate, or obovate-elliptic, 2-3 × 1-1.7 cm, papery, abaxially with long white trichomes, midvein with spreading brown trichomes, adaxially with shorter spreading brown subbasifixed to medifixed trichomes, midvein abaxially prominent and adaxially impressed, secondary veins 4 or 5 on each side of midvein, base cuneate to rounded, apex rounded to truncate and with a ca. 1 mm mucro. Racemes ca. 12 cm; peduncle 1-1.3 cm; rachis striate, with spreading brown trichomes; bracts linear, ca. 4 mm, abaxially with subbasifixed 2-branched brown trichomes. Pedicel ca. 3 mm. Calyx with spreading brown subbasifixed 2-branched trichomes; tube 2-2.5 mm; teeth lanceolate-subulate, 2.5-3.5 mm. Corolla white; standard elliptic to oblong, 11-14 × ca. 5 mm, outside with ap­pressed white medifixed-subbasifixed trichomes, base rounded, apex obtuse and with a ca. 1 mm mucro; wings ca. 13 × 2 mm, base auriculate, margin ciliate; keel ca. 1.5 cm, outside apically hairy, claw ca. 1 mm. Stamens 1.2-1.3 cm; anthers ovoid, gla­brous. Ovary hairy, with 13-15 ovules. Legume cylindric, ca. 4.5 cm, with appressed brown trichomes. Seeds 14 or 15 per legume. Fl. Apr-Aug, fr. Jul-Aug.

● Woodlands, scrub; 400-2500 m. N Guangxi, S Guizhou, E Yunnan.


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