Hypericum gymnanthum Engelm. & Gray

Annual herb (0.06-)0.15-0.7 m tall, erect or sometimes with base shortly decumbent and rooting, with stems solitary, without or rarely with l-3(-6) pairs of suberect branches above, with lines smooth; internodes 4-70 mm, long, all or upper exceeding leaves. Leaves sessile, spreading, not tetrastichous, persistent; lamina (5-)10-25 x 3-12 mm, ovate-deltoid or broadly ovate to rarely oblong, plane, not cucullate, midrib prominent beneath, smooth, paler beneath, charta ceous; apex subacute to rounded, margin plane, base cordate-amplexicaul to rounded, not sheathing, free; basal veins (3-)5, often with less prominent ascending midrib branches, tertiary reticulation rather lax, obscure; laminar glands dense, punctiform, not prominent. Inflorescence (l-)5-35(-c. 65)- flowered, terminal, branching regularly dichasial, occasionally with flowering branches from up to 6 nodes below, the whole laxly corymbiform to cylindric; pedicels l-4(-12) mm long; uppermost leaves and bracts subulate, entire. Flowers 4.5-7 mm in diam., stellate. Sepals (3-)3-5.5 x 0.8-1.2 mm, equal, proximally imbricate, lanceolate to narrowly ovate, acute to acuminate, margin entire; veins 3-5, unbranched, not promin ent. Petals golden (?) yellow, not veined red outside, (2-)3-3.5(-4) x 0.9-1.2 mm, shorter than sepals, oblanceolate; apiculus and glands absent. Stamens 10-14, scarcely grouped, longest 1.5-2.5 mm long, c. 0.7 x petals. Ovary c. 1 x 0.5 mm, narrowly ovoid; styles 3, 0.5-0.7 mm long, c. 0.5 (?) x ovary; stigmas narrowly capitate. Capsule (3-) 3.5-5 x 1.5-2 mm, narrowly conic-ellipsoid, slightly shorter than to slightly exceeding sepals. Seeds 0.5-0.6 mm long: testa finely linear-scalariform.