广东石豆兰 guang dong shi dou lan

Rhizome creeping or straggling, ca. 2 mm in diam., rooting from nodes of rhizome and base of pseudobulbs, roots spreading. Pseudobulbs 2-7 cm apart from each other, cylindric, 1-2.5 cm, 2-5 mm in diam., with a terminal leaf. Petiole 1-2 mm; leaf blade oblong, usually 2.5-4.7 × 0.5-1.4 cm, leathery, apex obtuse-rounded and slightly emarginate. Scape from base of pseudobulb or node of rhizome, erect, to 9.5 cm, slender; raceme shortened, umbel-like, 2-4(-7)-flowered; peduncle ca. 0.5 mm in diam., sparsely with 3-5 narrowly tubular sheaths 6-10 mm; floral bracts narrowly lanceolate, ca. 2 mm. Pedicel and ovary ca. 2 mm. Flowers pale yellow. Sepals free, narrowly lanceolate, 8-10 × 1-1.3 mm, apical ca. 3/5 length of margins incurved, apex long acuminate; lateral sepals often slightly longer than dorsal sepal, 1/5-2/5 width of their base adnate to column foot; mentum inconspicuous. Petals narrowly ovate-lanceolate, 4-5 × ca. 0.4 mm, entire, long acuminate; lip narrowly lanceolate, ca. 1.5 × 0.4 mm, fleshy, grooved in basal half, adaxially with 2 or 3 ridges fused halfway to form a thickened ridge, apex obtuse. Column ca. 0.5 mm; stelidia ca. 0.2 mm; foot ca. 0.5 mm, with free part ca. 0.1 mm; anther cap densely minutely papillate. Fl. May-Aug.

● Rocks in forests; 800-1200 m. N Fujian, Guangdong, C and N Guangxi, Guizhou, Hubei, SW Hunan, Jiangxi, S Yunnan, Zhejiang.