Thesium impeditum A.W.Hill

Stems tufted from the apes of a rhizome, slender, simple or sparingly branched, slightly angular, glabrous; leaves linear, with acute recurved tips, 2-7 lin. long, flat, rather thick, glabrous; flowers in lax spikes, solitary in the axil of each bract; bracts slightly adnate to or free from the peduncle, linear, with acute recurved tips, as long as or slightly exceeding the flower, flat on the upper surface, glabrous; bracteoles half as long as the flowers or slightly more, otherwise similar to the bracts; perianth 1-1 1/2 lin. long; segments narrowly lanceolate, subacute, 2/3-1 lin. long, densely bearded; anthers about 1/4 lin. long, exserted from the perianth-tube; style 1/4 lin. long, reaching to a little below or above the base of the anthers; fruits ellipsoid-globose, 2 1/3 lin. long including the persistent perianth, prominently 10-ribbed, purplish, distinctly reticulate between the ribs.