Hypericum teretiusculum
Subshrub 0.4-1 m tall, erect, 1-stemmed or branched near base, with branches ascending-pyramidal or spreading, lateral only. Stems dull red-brown, 4-lined when young, soon 2-lined to subterete, cortex exfoliating in strips; internodes 9-70 mm long, usually exceeding leaves. Leaves sessile, spreading; lamina (10-)14-27 x 5-17 mm, broadly elliptic to broadly ovate, plane or margin recurved, subconcolorous, not glaucous, coriaceous; apex acute to rounded, base broadly cuneate to cordate, free or shortly connate; basal veins 3-5, midrib pinnately branched, tertiary reticulum dense; laminar glands rather dense to sparse, prominent beneath or obscure. Inflorescence (3-)10--flowered, dichasial/monochasial from 1-2 nodes, sometimes with lateral branches from nodes immediately below, the whole corymbiform to broadly paniculate; primary pedicels 3-4 mm long; bracts linear- lanceolate, acute. Flowers 10-12 mm in diam., stellate; buds ovoid-triangular, acute. Sepals 5-7 x 2-2.5 mm, subequal, imbricate, ovate-lanceolate to lanceolate, subacuminate; veins 5-7, midrib prominent; glands linear, sometimes distally punctiform. Petals yellow, 7-10 x 3.5-4.5 mm, c. 1.4 x sepals, oblong-obovate; apiculus subacute; glands linear to elongate-punctiform. Stamens c. 40-70, obscurely 5-fascicled, longest 3-4 mm long, c. 0.5 x petals. Ovary c. 2 x 1 mm, ovoid-ellipsoid; styles 5, 2-2.5 mm long, c. 1-1.2 x ovary, spreading; stigmas subclavate. Capsule 4-5 x 3.5-4 mm, ovoid-subglobose, obtuse to shortly rostrate, about equalling sepals. Seeds 0.7-0.8 mm long; testa ribbed-scalariform.
Damp meadows and bogs; 840-1000 m.
Brazil (São Paulo?, Paraná, Santa Catarina, Rio Grande do Sul), Paraguay (Guaira)?
H. teretiusculum is related to H. rigidum subsp. sellowianum through the somewhat anomalous, multiflowered Paraná populations of that subspecies. It differs in being less woody, with larger, broader, cordate leaves and reduced bracts. The Paraguay record is doubtful, because the Geneva (G) specimen of Hassler 8758 is typical H. connatum. If the type specimen came from the north bank of the rio Itarare, then H. teretiusculum also occurs in São Paulo.