Hypericum canadense L.

Perennial or annual herb, perennating by autumn basal offshoots, 0.3-0.6(0.75) m tall, erect, with stems few or solitary, often with strict or ascending branches from upper nodes, not rooting, with taproot. Stems green, 4-angled, scarcely ancipitous above, with lines smooth, internodes 2 mm (lower) to 30 mm (upper) long, shorter than to exceeding leaves,. Leaves sessile to subsessile, erect or spreading, not tetrastichous, persistent; lamina (6-) 10-40 (-55) x 0.5-4(-5.5) mm, linear to oblanceolate-linear (the lower oblanceolate to obovate), plane, not cucullate, midrib prominent proximally, smooth, slightly paler beneath, not glaucous, chartaceous; apex rounded, margin entire, base parallel-sided to attenuate, not sheathing, free; basal or near-basal veins l-3(-5), without or with 1-4 pairs of ascending midrib branches, tertiary reticula-tion obscure, dense; laminar glands dense, punctiform, not prominent. Inflorescence 1-c. 35-flowered, terminal, branching regularly dichasial or monochasial above 2nd or 3rd node, sometimes with ascending pairs of flowering branches from up to 8 nodes below, the whole diffusely corymbiform to cylindric; pedicels 1-3 mm long; uppermost leaves and bracts subulate, entire. Flowers 5-6 mm in diam., stellate. Sepals 2.5-4.5 x 0.8-1 mm, linear-lanceolate to lanceolate or rarely ovate, acute to acuminate, margin entire; veins 3-5, unbranched, not prominent. Petals golden yellow, occasionally veined red outside, 2.5-4 x 1-l.4(-2) mm, equalling or shorter than sepals, elliptic to narrowly obovate; apiculus and glands absent. Stamens 12-25, obscurely 3-5-fascicled, longest 2-2.5 mm long, c. 0.7 x petals. Ovary c. 2 x 1 mm, ovoid-conic; styles 3, 0.5-0.8 mm long, c. 0.3 x ovary; stigmas narrowly capitate. Capsule 4-6 x (l.5)2-2.5(-3) mm, narrowly conic to conic-cylindric, exceeding sepals. Seeds 0.5-0.7 mm long; testa finely linear-scalariform.