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.

1–15, prostrate, unbranched (rarely branched), 15–40 cm, densely puberulent with curved trichomes to tomentose, 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.

opposite, petiolate, stipular colleters absent;

petiole 5–10 mm, densely puberulent with curved trichomes;

blade ovate to nearly orbiculate, 3.5–6 × 3–4 cm, subsucculent, base obtuse to cordate, margins entire, apex obtuse to acute or rounded, venation eucamptodromous, surfaces pilosulous, more densely so abaxially, especially on veins, becoming glabrate adaxially, margins inconspicuously ciliate, laminar colleters absent.

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 and extra-axillary, pedunculate, 20–55-flowered;

peduncle 1.5–9 cm, tomentose, with 1 caducous bract at the base of each pedicel.

7–20 mm, puberulent with curved trichomes.

10–13 mm, tomentose to pilose.

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, pilose to tomentose;

corolla pale pink to red, lobes reflexed with spreading tips, oval, 5–6 mm, apex acute, glabrous;

gynostegium sessile;

fused anthers yellow to brown or green, broadly barrel-shaped, 1.5–2 mm, wings deltoid, widest at middle, closed, apical appendages ovate;

corona segments pinkish cream to cream, subsessile, conduplicate, dorsally rounded, spreading away from anthers, 2–3 mm, greatly exceeded by style apex, apex truncate, glabrous, internal appendage absent;

style apex shallowly depressed, cream to green.

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

coma 2.5–3 cm.

ovate, 6–8 × 5–6 mm, margin very narrowly winged, faces rugulose;

coma 2–2.5 cm.

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

erect on upcurved pedicels (at least until maturity), lance-ovoid, 6–10 × 2–3 cm, apex obtuse to acuminate, longitudinally ridged, pilosulose or tomentulose to glabrate.

= 22.