Herbs or subshrubs, weak to erect, to 1.2 m tall, often brown to yellowish brown when dry; stems glabrous to densely puberulent or villosulous. Leaves in subequal pairs; petiole 1-4 cm, glabrous to densely puberulent or villosulous; blade drying papery to thickly papery, grayish brown or grayish green adaxially, pale green to yellowish brown abaxially, oblong-elliptic, elliptic, ovate, ovate-oblong, or lanceolate-oblong, 6-20 × 1.5-7 cm, glabrous throughout or sometimes puberulent abaxially, base obtuse to acute, margins entire, apex acute to acuminate; secondary veins 7-15(to 18, O. paniculiformis) pairs; stipules broadly triangular, 0.8-1.5 mm, puberulent to glabrous, caducous. Inflorescences paniculiform to corymbose, several to many flowered, densely puberulent to pilosulous; peduncles 1.5-7 cm; axes helicoid; bracts linear, 1-6 mm. Flowers distylous, subsessile or pedicels to 2 mm. Calyx densely puberulent; hypanthium subglobose to turbinate, 1-1.3 mm, smooth to weakly 5-ribbed; lobes triangular, 0.4-1 mm, sometimes with 1 gland in each sinus. Corolla white to pink, often drying yellow or pale red, subtubular to tubular-funnelform, slightly swollen at base, puberulent to glabrous outside, inside villous near middle of tube and scaly pubescent above middle and onto lobes; tube 9-12(-15) mm; lobes triangular, 1.8-3(-4) mm, dorsally with wing ca. 0.3 mm wide and often prolonged near apex, apex rostrate. Capsules mitriform, 3-4 × 6-9 mm, densely puberulent to subglabrous. Fl. winter and spring, fr. spring and summer.
Home