Flora of North America species comparison

1–10, erect, unbranched, 25–100 cm, puberulent with curved trichomes or thinly tomentose to glabrate, sometimes glaucous, rhizomatous.

1–10, erect to spreading, rarely branched, 30–100 cm, tomentose to puberulent with curved trichomes or glabrate, not glaucous, rhizomatous.

opposite, sessile or petiolate, with 1–4 stipular colleters on each side of petiole, sometimes also in axil;

petiole 0–4 mm, thinly tomentose to glabrate;

blade oval or oblong to ovate or orbiculate, 5.5–14 × 3–14 cm, subsucculent to coriaceous, base cordate, sometimes clasping, margins entire, apex truncate to rounded, sometimes emarginate, mucronate, venation brochidodromous, surfaces thinly tomentose to glabrate, sometimes glaucous, margins minutely ciliate to glabrous, 24–80 laminar colleters.

opposite, or alternate or whorled at upper nodes, petiolate, with 0–2 stipular colleters on each side of petiole (sometimes additionally in the axil);

petiole 4–15 mm, tomentose;

blade oblong or oval to lanceolate or ovate, often conduplicate, 8–20 × 2–8 cm, chartaceous, base obtuse or truncate to cordate, margins entire or often undulate, apex acuminate to obtuse, mucronate, venation brochidodromous, surfaces tomentose to densely puberulent with curved trichomes, margins ciliate, 6–8 laminar colleters.

extra-axillary, sessile or pedunculate, 20–59-flowered;

peduncle 0–2.5 cm, puberulent with curved trichomes to pilosulous, with 1 caducous bract at the base of each pedicel.

terminal, sometimes branched, and extra-axillary at upper nodes, pedunculate, 12–57-flowered;

peduncle 1–10 cm, densely tomentose, with 1 caducous bract at the base of each pedicel.

15–35 mm, densely tomentose to glabrate.

15–50 mm, densely tomentose.

erect to pendent;

calyx lobes lanceolate, 4–5 mm, apex acute, tomentose to glabrate;

corolla green, lobes reflexed, elliptic to oval, 7–9 mm, apex acute, glabrous abaxially, papillose at base adaxially;

gynostegial column 1–1.5 mm;

fused anthers green, cylindric, 3–3.5 mm, wings right-triangular, closed, apical appendages ovate;

corona segments cream, sometimes dorsally yellow, aging yellow, stipitate, conduplicate, dorsally rounded, 3–5.5 mm, equaling to slightly exceeding style apex, apex truncate, oblique, papillose, internal appendage falcate, exserted, sharply inflexed over style apex, papillose;

style apex shallowly depressed, green.

erect to spreading;

calyx lobes lanceolate, 3–4 mm, apex acute, densely tomentose;

corolla greenish cream, ochroleucous, or pinkish cream, deep pink or tan abaxially, lobes reflexed, tips usually spreading, oval, 7–9 mm, apex acute, tomentose abaxially towards tips, glabrous adaxially;

gynostegial column 1–1.5 mm;

fused anthers dark brown, cylindric, 2.5–3 mm, wings right-triangular, closed, apical appendages ovate;

corona segments cream to dark pink, stipitate, conduplicate, dorsally rounded, 2.5–3 mm, exceeded by style apex, apex truncate, oblique, papillose, internal appendage falcate, exserted, sharply inflexed towards style apex, papillose;

style apex shallowly depressed, cream.

ovate, 7–8 × 5–6 mm, winged, faces minutely rugulose to smooth;

coma 3–4 cm.

ovate, 7–9 × 4–6 mm, margin narrowly winged, faces faintly rugulose;

coma 2.5–3 cm.

erect on upcurved pedicels, ovoid, 6.5–9.5 × 2–3 cm, apex obtuse to apiculate, smooth, minutely pilosulous to thinly tomentulose.

erect on upcurved pedicels, lance-ovoid, 5–10 × 1.5–3 cm, apex apiculate, smooth, densely tomentose.

= 22.