Flora of North America species comparison

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

ascending, branched, wiry, leafy, slender, 10–20 cm, finely retrorse gray-puberulent.

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.

largest in mid-stem region;

blade linear to narrowly lanceolate or oblanceolate, 1–4 cm × 1–5 mm, apex sharply acuminate, glandular-puberulent.

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

with flowers usually solitary, terminal on branches.

shorter than calyx, glandular-puberulent.

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 10-veined, tubular, constricted around carpophore, umbilicate, 20–30 × 3–6 mm, papery, green, glandular-puberulent, lobes lanceolate, 2–4 mm, margins membranous, apex acute;

corolla scarlet, clawed, claw equaling calyx, limb obconic, 2-lobed, 7–10 mm, margins entire or crenate, appendages ± lacerate, 1–1.5 mm;

stamens exserted, ± equaling corolla lobes;

styles 3, exserted, ± equaling corolla lobes.

equaling calyx, opening by 6 teeth;

carpophore less than 1 mm.

narrowly ellipsoid, equaling calyx, opening by 6 recurved, brittle teeth;

carpophore ca. 5 mm.

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

brown, reniform, 1.5 mm, rugose in concentric rings on sides, margins papillate.

= 24.

= 48.