Flora of North America species comparison

1 (rarely more), erect to spreading, unbranched, 40–70(–200) cm, densely hirtellous to velutinous, not glaucous, rhizomes absent.

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

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

petiole 1–4 mm, densely hirtellous to velutinous;

blade oblong or elliptic to obovate or ovate, 4–9 × 1–3.5 cm, subcoriaceous, base rounded or truncate to cordate, margins sometimes crisped, apex acute to truncate, sometimes emarginate, often mucronate, venation brochidodromous, surfaces densely hirtellous to velutinous abaxially, hirtellous adaxially, margins ciliate, 8–12 laminar colleters.

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, sometimes also appearing terminal, sessile or pedunculate, 7–31-flowered;

peduncle 0–0.5 cm, densely hirtellous to velutinous, 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.

10–12 mm, densely hirtellous to velutinous.

12–20 mm, densely puberulent with curved trichomes.

erect to pendent;

calyx lobes elliptic, 5–6 mm, apex acute, densely hirtellous;

corolla green, sometimes tinged reddish or bronze, lobes reflexed, sometimes with spreading tips, elliptic, 7–9 mm, apex acute, glabrous abaxially, minutely papillose at base adaxially;

gynostegial column 1–1.5 mm;

fused anthers green, obconic, 2.5–4 mm, wings right-triangular, open at base, apical appendages broadly ovate;

corona segments bronze to yellow, often tinged red, sometimes apically cream or pale, stipitate, tubular, somewhat flattened laterally, flared at base, 5–8 mm, greatly exceeding style apex, apex rounded, flared, glabrous, internal appendage falcate, exserted, sharply incurved over style apex, glabrous;

style apex shallowly depressed, green.

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.

broadly ovate, 8–9 × 6–7 mm, margin winged, faces smooth;

coma 2–5 cm.

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

coma 2.5–4 cm.

erect on upcurved pedicels, narrowly to broadly fusiform, 7.5–12.5 × 1.5–2.5 cm, apex acuminate, smooth, densely hirtellous to velutinous.

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