Flora of North America species comparison

1–several, erect, sparsely to moderately branched, 30–150 cm, minutely pilosulous in a line to glabrate, not glaucous, rhizomes absent.

1–few, erect, unbranched, 30–120 cm, puberulent with curved trichomes, sometimes in a single line, sometimes glaucous, rhizomes absent.

persistent or gradually caducous from the base, opposite, petiolate, with 1 or 2 stipular colleters on each side of petiole on a ciliate interpetiolar ridge;

petiole 4–25 mm, puberulent with curved trichomes in a line to glabrate;

blade elliptic or oval to linear, 4–18 × 0.3–4.5 cm, membranous, base cuneate, margins entire, apex acute to acuminate to attenuate, venation eucamptodromous to faintly brochidodromous, surfaces sparsely puberulent with curved trichomes on veins abaxially, sparsely puberulent with curved trichomes on veins to glabrate adaxially, margins ciliate, laminar colleters absent.

opposite, petiolate, with 1 or 2 stipular colleters on each side of petiole;

petiole 10–25 mm, puberulent with curved trichomes;

blade oval to ovate, obovate, lanceolate, or oblanceolate, 6–15 × 3–9 cm, subcoriaceous, base cuneate to obtuse or subtruncate, margins sometimes crisped, apex rounded to obtuse, apiculate or mucronate, venation eucamptodromous to faintly brochidodromous, surfaces puberulent on veins with curved trichomes, sometimes glaucous, margins ciliate, 8–12 laminar colleters.

extra-axillary, pedunculate, 5–22-flowered;

peduncle 0.5–8 cm, puberulent with curved trichomes in a line, with 1 caducous bract at the base of each pedicel.

terminal, branched, also usually extra-axillary at 1 distal node, pedunculate, 11–28-flowered;

peduncle 1–7 cm, densely puberulent with curved trichomes, with 1 caducous bract at the base of each pedicel.

7–20 mm, puberulent with curved trichomes.

12–20 mm, densely puberulent with curved trichomes.

erect;

calyx lobes linear-lanceolate, 3–4 mm, apex acute, puberulent with curved trichomes;

corolla red, sometimes yellow in throat (to wholly orange or yellow in cultivars), lobes reflexed with spreading tips, elliptic to oval, 6–9 mm, apex acute, glabrous abaxially, minutely papillose at base adaxially;

gynostegial column 2–2.5 mm;

fused anthers yellowish green to tan, cylindric, 1.5–2 mm, wings narrowly right-triangular, closed, apical appendages deltoid;

corona segments yellow to orange, stipitate, tubular, dorsally somewhat flattened, 3.5–4 mm, exceeding style apex, apex obtuse to acute, glabrous, internal appendage falcate, exserted, arching over style apex, glabrous;

style apex shallowly depressed, yellow.

erect to spreading;

calyx lobes lanceolate, 2–3 mm, apex acute, pilosulous;

corolla white, red-violet in throat, lobes reflexed with spreading tips, elliptic, 6–8 mm, apex acute, glabrous abaxially, minutely papillose at base adaxially;

gynostegial column red-violet, 1–2 mm;

fused anthers brown, truncately obconic, 1.5–2 mm, wings right-triangular, rounded, closed, apical appendages ovate;

corona segments white, stipitate, conduplicate with a lateral flange on each side, 2.5–4 mm, exceeding style apex, apex truncate, glabrous, internal appendage falcate, exserted, sharply inflexed over style apex, glabrous;

style apex shallowly depressed, white.

ovate, 6–7 × 4–5 mm, margin winged, faces minutely rugulose to smooth;

coma 2.5–3 cm.

ovate, 5–7 × 3–5 mm, margin winged, faces rugulose;

coma 2.5–4 cm.

erect on straight pedicels, fusiform, 6–10 × 0.5–1.2 cm, apex acuminate to attenuate, smooth, glabrous.

erect on upcurved pedicels, narrowly fusiform, 10–15 × 1.5–2 cm, apex long-acuminate, smooth, pilosulous.

= 22.