Thesium frisea L.

Stems fairly slender, ascending, often much-branched; branches sulcate, glabrous; leaves linear-acicular, acute, 1/4-1 1/4 in. long, about 1/3 lin. thick, glabrous; flowers arranged in fairly dense spikes of cymules; bracts free from the peduncle, linear, acute, up to 2 lin. long, rather sharply keeled below, concave above; bracteoles about half the length of the flowers, with very narrowly membranous finely toothed margins; perianth 1-1 1/4 lin. long, with conspicuous external glands; segments elliptic, flat, subacute, 3/4 lin. long, more or less hooded, with a dense woolly apical beard and a ring of throat hairs; anthers exserted, 1/3 lin. long; style 1/8-1/4 lin. long, reaching to the level of the ring of hairs; fruits ellipsoid-globose, 1 1/2 lin. long, distinctly 10-ribbed, strongly reticulate between the ribs.