122. Astragalus aurantiacus Handel-Mazzetti, Symb. Sin. 7: 557. 1933.
橙黄花黄耆 cheng huang hua huang qi
Astragalus dependens Bunge var. aurantiacus (Handel-Mazzetti) Y. C. Ho; A. dependens var. flavescens Y. C. Ho; A. dependens var. sericeus K. T. Fu.
Plants up to 65 cm tall, with subappressed to nearly spreading hairs 0.1-0.5 mm. Stems erect, glabrous or with scattered hairs. Leaves 1.5-4 cm, subsessile; stipules whitish membranous, 3-4 mm, subglabrous, free from each other; rachis slender, sparsely to loosely covered with subappressed to spreading white and a few black hairs; leaflets in 3-7 pairs, narrowly elliptic, 5-10 × 1.5-3 mm, abaxially rather densely and adaxially sparsely hairy, apex rounded to retuse or slightly emarginate. Racemes at anthesis densely many flowered, later strongly elongated up to 15 cm; peduncle 6-26 cm, sparsely to loosely covered with ascending white or black hairs; bracts 2-3 mm, long subulate-acuminate, mostly black hairy. Calyx 2-2.5 mm, loosely covered with appressed black and a few white hairs 0.1-0.15 mm; teeth 0.3-0.5 mm. Petals orange; standard obovate, 5-6 × 3-4 mm, apex widely emarginate; wings 5-5.5 mm, limbs slightly obliquely incised; keel 4.5-5 mm. Legumes sessile, widely ellipsoid, ca. 4 mm, ca. 3 mm high and ca. 2 mm wide, slightly keeled ventrally, deeply grooved dorsally, rounded at apex, with a persistent style ca. 2 mm, 2-locular, glabrous. Seed 1 in each locule.
● Gansu, Nei Mongol, Qinghai, Sichuan, Xinjiang.