Usually smaller (rarely up to 30 cm tall), with narrower leaves 2-3 mm wide, and copiously pubescent all over with long, white or greyish patent hairs. Leaves from much shorter than to about as long as the stems. Inflorescence consisting of a terminal cluster 1-1½ cm wide;
Annam present, Asia-Tropical: Laos (Laos present); Malaya (Peninsular Malaysia present); Thailand (Thailand present), Bukit Ketri present, Ceylon present, Cochinchina present, Perlis present, Tonkin present
Ceylon, Thailand, Cochinchina, Tonkin, Laos, Annam; in Malesia: Malay Peninsula (Perlis: Bukit Ketri), once collected, together with S. thwaitesiana. .