Flora of North America species comparison

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

1–few, erect, unbranched to inflorescence, 30–150 cm, puberulent in a line with curved trichomes or densely pilose to glabrate, not 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 on a ciliate interpetiolar ridge;

petiole 1–15 mm, pilosulous to pilose;

blade lanceolate to linear-lanceolate or ovate, 5–15 × 0.5–4.5 cm, membranous, base obtuse to rounded or subcordate, margins entire, apex acute to acuminate or attenuate, venation eucamptodromous, surfaces sparsely puberulent with curved trichomes or pilose to glabrate, margins ciliate, 2–6 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.

extra-axillary at upper nodes, branched, pedunculate, 10–31-flowered;

peduncle 1.5–7 cm, puberulent with curved trichomes to pilosulous, sometimes only on 1 side, to pilose, with 1 caducous bract at the base of each pedicel.

16–37 mm, sparsely pilose.

10–15 mm, pilosulous to puberulent with curved trichomes, sometimes only on 1 side, to pilose.

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;

calyx lobes lanceolate, 2–2.5 mm, apex acute, pilosulous to puberulent with curved trichomes;

corolla pink to white, lobes reflexed with spreading tips, elliptic, (4.5–)5–6 mm, apex acute, glabrous abaxially, minutely papillose at base adaxially;

gynostegial column 1.2–1.5 mm;

fused anthers green to brown, columnar, 1.5–2 mm, wings narrowly right-triangular, slightly open at base, apical appendages deltoid;

corona segments pink to white, often paler than corolla, stipitate, tubular, dorsally rounded to slightly flattened, 2–2.5 mm, ± equaling style apex, apex obtuse, glabrous, internal appendage acicular, exserted, arching over style apex, glabrous;

style apex shallowly depressed, green, white, or pink.

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

coma 3–3.5 cm.

ovate, 8–9 × 5–6 mm, margin broadly winged, faces smooth;

coma 1.5–2 cm.

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

erect on straight pedicels, fusiform, 6–9 × 0.8–1.2 cm, apex long-acuminate, smooth to indistinctly ribbed, sparsely puberulent with curved trichomes to pilose or pilosulous.

= 22.