刚毛紫地榆 gang mao zi di yu

Geranium strigosum Franchet var. hispidissimum Franchet, Pl. Delavay. 113. 1889; G. platylobum (Franchet) R. Knuth; G. strigosum var. platylobum Franchet.

Perennials. Rootstock ± vertical, 0.6-1.6 cm in diam., not tuberculate, without thickened roots. Stem 16-72 cm tall, erect or ascending, not rooting at nodes, with 0.1-0.3 mm uncinate nonglandular trichomes, 0.3-3.5 mm patent glandular trichomes, and usually 0.5-3.3 mm patent nonglandular trichomes. Stipules lanceolate, distinct. Leaves opposite; petiole with 0.1-0.3 mm uncinate nonglandular trichomes, 0.4-3.2 mm patent glandular trichomes, and usually 0.4-3.1 mm patent nonglandular trichomes; leaf blade 2.4-5.3 cm, palmately cleft, ratio of main sinus/middle segment length = (0.55-)0.67-0.76(-0.8), pilose with ± appressed nonglandular and glandular trichomes; segments 5, obtriangular, 4.8-11.7 mm wide at base, 9-16-lobed in distal half, ratio of second sinus/middle segment length = 0.14-0.28. Cymules solitary, 2-flowered; peduncle 1.1-14.5 cm. Pedicel 0.8-3.2 cm, with 0.1-0.3 mm uncinate nonglandular trichomes, 0.6-2 mm patent glandular trichomes, and usually 0.2-2.2 mm patent nonglandular trichomes; bracteoles lanceolate. Sepals 4.9-7.3 mm, mucro 0.8-2.4 mm, ratio of mucro/sepal length = 0.17-0.35, outside with 0.1-0.5 mm ± patent nonglandular trichomes and 1-3.4 mm patent glandular trichomes, inside glabrous adaxially. Petals white or pinkish, 8.6-9.8(-10.6) mm, erect to patent, outside usually glabrous, inside basally with trichomes, margin basally ciliate, apex rounded. Staminal filaments whitish, lanceolate, abaxially pilose and proximal half ciliate, trichomes 0.2-0.9 mm; anthers brownish purple, 1.2-1.7 mm. Nectaries 5, hemispheric, abaxially glabrous, apex with a tuft of trichomes. Stigma pinkish. Fruit 2.3-2.8 cm, erect when immature; mericarps reticulate, without a basal callus, glabrous or with 0.1-0.2 mm ± appressed nonglandular trichomes; rostrum 1.6-2 cm, without a narrowed apex or with a 0.5-1 mm narrowed apex; stigmatic remains 1.5-2.4 mm. Seeds 2.2-3.3 mm. Fl. Jun-Jul, fr. Jul-Sep.

● Secondary forests, scrub, meadows; 1500-3000 m. NW Yunnan.

Plants that have gone under the name Geranium platylobum represents a form with more rounded leaf blade segments, otherwise indistinguishable from G. hispidissimum. Indumentum of G. hispidissimum is variable. In some specimens, glandular trichomes can densely cover stems, petioles, or pedicels, although they can be scattered in others. Patent nonglandular trichomes are not always present.