Arenaria lanuginosa (Michx.) Rohrb.

Plants ± strongly perennial, pos-sibly blooming first year, not matted. Taproots filiform to moderately thickened; rhizomes often present, slender, 2-15+ cm. Stems 1-80+, erect or ascending to procumbent or prostrate to trailing, green, 5-60 cm; internodes terete to angular, 1/ 3-8+ times as long as leaves, dull, retrorsely pubescent throughout or in lines, hairs minute. Leaves usually connate basally, with scarious sheath 0.1-0.5 mm, occasionally petiolate (proximal leaves) or sessile; petiole 2-5 mm; blade 1-veined, vein prominent abaxially, linear-lanceolate to narrowly elliptic or oblanceolate, 3-35 × 2-14 mm, herbaceous, margins thickened, scarious, shiny, ciliate proximally or throughout, apex obtuse or acute to apiculate, often minutely pustulate, ciliate on margins and adaxial midrib; axillary leaf clusters absent. Inflorescences axillary, solitary flowers or in proliferating, mostly terminal, leafy, 1-80+-flowered cymes. Pedicels erect to ascending (often arcuately so), or straight to widely divergent, often hooked distally in fruit, 2-40 mm, retrorsely pubescent. Flowers: sepals green, 1-3-veined, 2 lateral veins 4-3/ 4 times as long as midvein, often appearing prominently keeled proximally, lanceolate to ovate (herbaceous portion oblong or lanceolate to ovate), 2-5 mm, to 5.5 mm in fruit, apex acute to acuminate, not pustulate, glabrous; petals narrowly spatulate to obovate, 1.5-6 mm, 2-1 5 times as long as sepals or absent, apex obtuse to rounded, petals sometimes absent. Capsules ± loosely to tightly enclosed by calyx, ovoid, 3-6 mm, 5-1 2 times as long as sepals. Seeds 8-35, black, suborbicular, slightly compressed, 0.7-0.8 mm, shiny, smooth. 2n = 40, 44.