紫地榆 zi di yu

Geranium strictipes var. grandiflorum (Franchet) C. Y. Wu ex H. W. Li; G. strigosum Franchet (1887), not N. L. Burman (1768); G. strigosum var. gracile Franchet; G. strigosum var. grandiflorum Franchet.

Perennials. Rootstock ± vertical, 0.6-2.8 cm in diam., not tuberculate, without thickened roots. Stem 20-76 cm tall, erect or ascending, not rooting at nodes, with 0.3-2.2 mm patent nonglandular trichomes and usually 0.4-3.4 mm patent glandular trichomes or sometimes subglabrous. Stipules lanceolate, distinct. Leaves opposite; petiole with 0.4-2 mm patent nonglandular trichomes, 0.1-0.3 mm uncinate nonglandular trichomes, and usually 0.2-2.7 mm patent glandular trichomes; leaf blade 1.8-4.9 cm, palmately cleft, ratio of main sinus/middle segment length = (0.69-)0.8-0.88, pilose with ± appressed nonglandular and glandular trichomes; segments 5, rhombic, 3.2-8.3 mm wide at base, 8-16-lobed in distal half, ratio of second sinus/middle segment length = 0.24-0.46. Cymules solitary, 2-flowered; peduncle 4.1-10.9 cm. Pedicel 0.5-2.4 cm, with 0.2-1.9 mm patent nonglandular trichomes, 0.2-0.3 mm uncinate nonglandular trichomes, and 0.4-1.7 mm patent glandular trichomes; bracteoles lanceolate. Sepals 6-7.8 mm, mucro 0.8-2.3 mm, ratio of mucro/sepal length = 0.11-0.35, outside with 0.2-1.9 mm patent nonglandular trichomes and 0.8-2.8 mm patent glandular trichomes, inside glabrous. Petals pinkish, (1-)1.2-1.5 cm, erect to patent, both surfaces basally with trichomes, margin basally ciliate, apex rounded or with a 0.5-1 mm notch. Staminal filaments yellowish, lanceolate, abaxially pilose and proximal half ciliate, trichomes 0.2-0.8 mm; anthers yellowish, 1-2.7 mm. Nectaries 5, hemispheric, abaxially glabrous, apex with a tuft of trichomes. Stigma yellowish. Fruit 2.8-4.6 cm, erect when immature; mericarps reticulate, without a basal callus, with 0.1-0.2 mm ± appressed nonglandular trichomes; rostrum 1.9-3.7 cm, with a 1-2.6 mm narrowed apex; stigmatic remains 1.9-2.7 mm. Seeds 3.3-4.4 mm. Fl. Jul-Aug, fr. Aug-Sep.

● Secondary forests, scrub, meadows; 2500-3000 m. SW Sichuan, Yunnan.

Geranium strictipes shares reticulate mericarps and opposite leaves with G. hispidissimum. They are close species and difficult to distinguish, although G. strictipes has more deeply divided leaves (see primary and secondary division of middle segment and its narrower base). Additionally, the middle segment is rhombic in G. strictipes and ± obtriangular in G. hispidissimum. Leaf indumentum is denser in G. hispidissimum, which also has shorter petals.

The rhizomes are a local medicine for indigestion.