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.

1–25, decumbent to erect, unbranched or rarely branched, 15–70 cm, inconspicuously puberulent with curved trichomes to glabrate, not 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.

alternate to subopposite, petiolate, with 1–4 stipular colleters on each side of petiole plus 2–4 in axil;

petiole 2–6 mm, puberulent with curved trichomes to glabrate;

blade oblong or ovate to oval, elliptic, or lanceolate, 3–13 × 1–6 cm, chartaceous, base rounded to subcordate, margins entire, apex obtuse to rounded, often emarginate, sometimes mucronate, venation eucamptodromous to faintly brochidodromous, surfaces puberulent with curved trichomes to glabrate, more densely so on veins, margins ciliate, 6–12 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, pedunculate, 4–23-flowered;

peduncle usually branched, 0.5–6 cm, pilosulous to puberulent with curved trichomes, with 1 caducous bract at the base of each pedicel.

7–20 mm, puberulent with curved trichomes.

(8–)14–23 mm, puberulent with curved trichomes to pilosulous.

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 linear-lanceolate, 4–5 mm, apex acute, pilosulous to puberulent with curved trichomes;

corolla pale green, campanulate, lobes ascending and exceeding corona segments, oval, (9–)12–15 mm, apex acute to obtuse, glabrous;

gynostegium sessile;

fused anthers brown and green, turbinate, 2.5–3 mm, wings shallowly trapezoidal, closed, apical appendages ovate, erose;

corona segments pale to dark purple, upper margin usually white, sessile, clavate-tubular, 3–5 mm, greatly exceeded by style apex, deflexed at base, margins connivent, apex ascending to incurved, rounded, upper margin and cavity hirtellous, internal appendage a low internal crest, hirtellous;

style apex shallowly depressed, green.

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

coma 2.5–3 cm.

broadly ovate, 5.5–7.5 × 4–6 mm, margin winged, obscurely erose at chalazal end, faces rugulose, minutely hirtellous;

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, lance-ovoid to ovoid, 6–13 × (0.5–)1.2–3 cm, apex acuminate, shallowly rugose-ribbed, inconspicuously muricate apically on ribs, striate, pilosulous.

= 22.