Flora of North America species comparison

erect, simple or branched, slender, to 80 cm, subglabrous to retrorsely puberulent especially proximally, distal internodes frequently glutinous.

procumbent to ascending, branched, leafy, 15–45 cm, lanuginose, often sparsely so, viscid distally.

2 per node;

blade with margins ciliate toward base, apex acute to obtuse;

basal blades oblanceolate, spatulate;

cauline narrowly oblanceolate to linear, 1–9 cm × 2–15 mm, scabrous or puberulent, rarely glabrous on both surfaces.

2 per node;

proximal with blade obovate, spatulate, apex obtuse;

distal sessile, blade ovate to lanceolate, 2–5 cm × 2–20 mm, apex acute, sparsely pubescent adaxially, more densely so abaxially.

cymose, open, branches usually ascending, several- to many-flowered, 1-flowered in depauperate specimens.

pseudoracemose, lax, solitary flowers in axils of leafy bracts.

erect in flower, sharply deflexed at base in fruit, usually shorter than calyx, pilose and stipitate-glandular.

mature calyx prominently 10-veined, campanulate to ovate, 5–9 × 3–5 mm, margins dentate, glabrous, veins parallel, with pale commissures;

lobes usually purple, triangular, acute, ca. 1 mm;

petals white, often suffused with dark red, rarely wholly dark red, limb ovate, usually 2-lobed, ca. 2.5 mm, slightly longer than calyx, rarely petals absent, claw narrow, appendages 0.1–0.4 mm;

stamens included;

styles 3;

stigmas included.

calyx prominently 10-veined, obovoid, especially in fruit, clavate, constricted around carpophore and narrowed at mouth, umbilicate, inflated, 13–18 mm, loose and papery, pubescence glandular and eglandular, sparsely lanuginose, veins parallel, green or purple, with pale commissures, lobes triangular, ca. 2 mm, apex obtuse;

corolla bright pink, clawed, claw equaling calyx, limb obtriangular, 2-lobed, 7–11 mm, lobes divergent, ovate, appendages 2, shorter than 1 mm, apex acute;

stamens slightly longer than petal claw;

stigmas 3, equaling petals.

equaling calyx, opening by 6 teeth;

carpophore less than 1 mm.

included in calyx, ovoid-conic, opening by 6 teeth;

carpophore 3–6 mm.

dull gray-black, reniform, 0.5–0.8 mm diam., finely papillate.

dark brown, broadly reniform, 1.3–1.5 mm, with concentric crescents of shallow tubercles on both sides, margins with larger, deeper tubercles.

= 24.

= 24 (Europe).