Sharpleaf St. Johnswort

Description

Herbs perennial, erect, unbranched or branching at base and in inflorescence, 4�7.5(�10) dm. Stems internodes 4-lined. Leaves (main stem) ascending to spreading, sessile; blade lanceolate to oblong-elliptic or obovate, 10�30(�50) � 3�8(�12) mm, <on main stem, longer than internodes>, leathery, margins plane, apex usually acute to acuminate, rarely obtuse, basal veins 1�3+, midrib with 2�3 pairs of inconspicuous branches. Inflorescences broadly cylindric to corymbiform, 25�70-flowered, branching mostly dichasial, <subsidiary branches with or without relatively smaller leaves>. Flowers 8�13 mm diam. sepals narrowly ovate to lanceolate, equal, 3�3.5 � 1.5�2.5 mm, <margins sometimes ciliate, not setulose-ciliate>, apex acute to acuminate; petals orange-yellow, obovate, 6�10 mm; stamens 50�80, irregularly grouped styles 2�4 mm; stigmas capitate. Capsules ovoid to rostrate-subglobose, 3�5 � 2�3 mm. Seeds (0.5�)0.6�0.8(�0.9) mm; testa reticulate. 2n = 24.