Thesium procerum N.E.Br.

Robust rhizomatous shrub, up to 1.5 m tall, vegetative scales present on rhizome and lower parts of stems, stems 1 to 13, arising from rhizome at intervals, spreading or rarely suberect, abundantly branched, terete or faintly sulcate, brown below and glaucous-green above, usually sparsely leafy (5 to 10(16) leaves per 50 mm at middle of stem). Leaves slightly spreading, linear to linear-lanceolate, 3.0-11.0 x 0.2-0.9 mm, apex acute-acuminate and usually not cartilaginous, midrib raised on lower surface, less pronounced on upper surface, margins entire. Flowers in 4 to 16-flowered monotelic racemose inflorescences, with abundant 2 to 3-flowered monochasia and occasional 3-flowered dichasia, inflorescences often compressed; pedicels 0.0-1.5 mm long; cyme peduncles 1.0-4.5(6.0) mm long. Bracts linear-lanceolate, 4.3-5.5 x 0.4-0.8 mm, apex acute-acuminate, margins entire, fused to 2/3 or entire pedicel/peduncle, occasionally fused to ± 1/2 of cyme peduncles; bracteoles 2.5-3.5 x 0.3-0.5 mm. Perianth 2.5-4.0 mm long, receptacle elongate, 'glands' occasionally visible on outside; lobes lanceolate to narrowly triangular, 0.9-1.3 x 0.3-0.7 mm, apex hooded, with sparse apical beard. Stamens inserted at base of tepals; filaments 0.2-0.4 mm long; anthers 0.4-0.6 mm long. Style 0.6-0.8 mm long, stigma ± opposite anthers. Placental column twisted. Fruit stipitate, 5.0-7.0 mm long including persistent perianth (3.5-5.5 mm long excluding perianth), 2.3-2.8 mm wide, with prominent reticulate venation.