Flora of North America species comparison

1–20, ascending to spreading, unbranched, 25–100 cm, glabrous, glaucous, rhizomes absent.

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

opposite, sessile, stipular colleters absent;

blade ovate to lanceolate, 3.5–11 × 1.8–8 cm, chartaceous, base cordate, clasping, margins entire, apex acute, mucronate, venation brochidodromous to eucamptodromous, surfaces glabrous, glaucous, margins minutely 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.

terminal, branched, sometimes also extra-axillary at upper nodes, pedunculate, 5–20-flowered;

peduncle 0.3–6.5 cm, apically sparsely pilose to glabrate, with few bracts.

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.

16–37 mm, sparsely pilose.

12–20 mm, densely puberulent with curved trichomes.

erect to pendent;

calyx lobes elliptic to lanceolate, 3–5 mm, apex acute, pilose;

corolla red-violet, lobes reflexed with spreading tips, oval, 6–7 mm, apex acute, glabrous;

gynostegial column 1–1.5 mm;

fused anthers brown, cylindric, 1.5–2 mm, wings right-triangular, open at tip, apical appendages deltoid;

corona segments white, tinged pink to red-violet at base, sessile, tubular, 2–3 mm, exceeded by style apex, base saccate, apex truncate, oblique, glabrous, internal appendage absent;

style apex shallowly depressed, pink to red-violet.

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, 8–9 × 5–7 mm, margin not winged, faces reticulate-rugulose;

coma 3–3.5 cm.

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

coma 2.5–4 cm.

erect on upcurved pedicels, lance-ovoid, 7.5–10.5 × 1.5–1.8 cm, apex long-acuminate, smooth, glabrous, glaucous.

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

= 22.