Thesium angulosum A.Dc.

A shrub, 5 ft. high; stems erect, broadly winged, wings with cartilaginous margins, glabrous; branchlets less broadly winged to angular, sometimes rather slender, glabrous; leaves linear, decurrent on the stem, with a prominent midrib continuous with the cartilaginous edge of the wing, acute or subacute, up to about 1/2 in. long and about 1 1/12 lin. broad, flat, glabrous; cymules arranged in rather elongated lax racemes; bracts adnate to the peduncle for more or less than half their length or sometimes almost free, linear-lanceolate, acutely acuminate; bracteoles shorter than the flowers; perianth 1 3/4-2 1/4 lin. long; segments elliptic, 1-1 1/4 lin. long, hooded, with papillose incurved margins; anthers exserted from the perianth-tube, 1/2 lin. long; style 1 1/4-1 1/2 lin. long, reaching to the top of the anthers; fruit with a stout yellow stalk about 1 lin. long, subglobose, about 2 lin. long, including the gaping persistent perianth, prominently 10-ribbed, not or only very slightly reticulate between the ribs.