20. Phyllolobium tribulifolium (Bentham ex Bunge) M. L. Zhang & Podlech, Feddes Repert. 117: 60. 2006.
蒺藜叶膨果豆 ji li ye peng guo dou
Astragalus tribulifolius Bentham ex Bunge, Mém. Acad. Imp. Sci. Saint Pétersbourg, Sér. 7, 11(16): 4. 1868; A. chingianus P. C. Li (1989), not E. Peter (1937); A. tanguticus Batalin; A. tanguticus f. albiflorus (K. T. Fu) K. T. Fu; A. tanguticus var. albiflorus K. T. Fu; A. tribulifolius var. pauciflorus C. Marquand & Airy Shaw.
Plants covered with white hairs, in inflorescence with mostly blackish hairs. Stems 6-20 cm, prostrate to ascending or erect, loosely, in upper part rather densely covered with spreading or sometimes partly appressed white or white and brownish hairs 0.2-0.3 mm. Leaves 1-5 cm, subsessile; stipules (1.5-)2.5-4.5(-5.5) mm, lower ones triangular, often semiamplexicaul, upper ones narrowly triangular, all sparsely to loosely hairy; rachis loosely to rather densely hairy; leaflets in (3 or)4-9(or 10) pairs, 3-15 × 2-5 mm, abaxially to densely and adaxially sparsely to loosely covered with subappressed to ascending hairs up to 0.5 mm, or adaxially glabrous. Racemes short, (1 or)2-10-flowered; peduncle 1-6 cm, rather densely hairy; bracts 1.5-4(-5) mm, hairy. Bracteoles 0.5-2 mm or sometimes absent. Calyx (3-)4-6(-7) mm, loosely to rather densely hairy; teeth (1-)1.5-4 mm. Petals violet, purple, or pinkish; standard orbicular to transversely elliptic, 8-12 × 8-12 mm; wings 7-9 mm; keel 7.5-11 mm. Legumes with a stipe 2-2.5 mm, 9-17 mm, 5-6.5 mm high and wide, with a beak 1-2 mm, 1-locular, loosely to rather densely covered with short, spreading or appressed, white, or white and blackish or only blackish hairs.
Dry open scrub-covered and rocky slopes; 2700-5500 m. Gansu, Qinghai, Sichuan, Xizang, Yunnan [India, Nepal, Pakistan].