Description
Key Characters:
Growth Form:
Subshrubs, usually many-branched from base, often forming clumps.
Stems:
Stems erect to ascending, 3–5 dm long, glabrous, often swollen at the nodes.
Roots:
Leaves:
Leaves simple.
Opposite or whorled.
Blades narrowly elliptic, 50–105 mm long, 7–16 mm wide.
Apex acute.
Base leaf bases often connate around the stem. gradually tapering to base.
Surfaces glabrous except Upper surfaces strigillose toward base.
Margins entire, ciliate in the lower 5–6 mm and sometimes also toward apex, sometimes somewhat undulate.
Stipules absent.
Flowers:
Flowers few in terminal, corymbose cymes, densely short–hirtellous throughout.
Flowers bisexual (perfect), actinomorphic. Pedicels 7–10 mm long.
Calyx tubular, 5-lobed, 22–30 mm long, 10–nerved, sometimes with conspicuous lateral nerves from the sinus nerves in upper ⅓, densely short–hirtellous, the lobes 3–6 mm long, margins scarious and weakly purple–tinged, also sparsely citiate.
Corolla of 5 petals; petals white, blades obovate, 8–10 mm long, deeply notched, the appendage ca. 2.5–3 mm long, deeply 2-cleft, each tooth obliquely bifid, the claw 11–12.5 mm long, sparsely ciliate.
Stamens exserted beyond calyx.
Ovary superior, 1-celled or incompletely 2–4 celled, on a well–developed stipe that is adnate to the staminal filament bases and petal bases (referred to as a carpophore); styles 3–4; Carpophore ca. 13 mm long.
Fruit:
Capsules oblong–obovoid; 3–4–celled in the lower 2/3; 9–10 mm long (immature); dehiscent by 6 or rarely 3 apical teeth or valves.
Seeds unknown.
Ploidy:
Habitat:
Extremely rare; known from a single population on a cliff face in diverse mesic forest.
Elevation Range:
ca. 790 m.