Flora of North America species comparison

arching [erect or ascending], glabrous [hairy].

striate, sometimes rooting at tips, 4–12-angled, 7–15 dm, gland-dotted.

caducous, cauline, whorled or opposite;

petiole absent or present;

blade not fleshy, not leathery, margins dentate or entire, distal leaf blade needlelike or scalelike.

dimorphic;

proximal: petiole 3–4 mm, in whorls of 3–6, blade ovate, 8–15 × 6–10 mm, margins dentate, surfaces glandular-punctate;

distal: petiole 0–1 mm, opposite or whorled, blade narrowly triangular, needlelike or scalelike, 1–2 × 1 mm, margins entire.

axillary, cymes;

bracts present.

2-flowered;

peduncles 3–4 cm.

present;

bracteoles usually present.

10–15 mm.

bisexual;

sepals 5, basally connate, calyx bilaterally symmetric, tubular or campanulate, lobes broadly ovate [lanceolate];

corolla red, bilaterally symmetric, bilabiate, tubular [funnelform], tube base not spurred or gibbous, lobes 5, abaxial 3, adaxial 2;

stamens 4, basally adnate to corolla, didynamous, filaments glabrous;

staminode [0 or]1, conical [filiform];

ovary 2-locular, placentation axile;

stigma subcapitate.

calyx lobes 2–3 mm, apex acute or mucronate;

corolla 15–25 mm, glabrous, adaxial lip deeply notched;

stamens 15–20 mm;

staminode 0.5–0.7 mm, sometimes with an abortive anther.

capsules, dehiscence septicidal, densely packed with white, membranous hairs.

globular, 3–6 mm;

style persistent.

50–200, dark brown [black], ovoid, wings absent.

0.3–0.4 mm, pitted.

= 20.