Flora of North America species comparison

1–few, spreading to decumbent, unbranched, 25–70 cm, puberulent with curved trichomes, not glaucous, rhizomes absent.

1–3, erect to ascending, unbranched, very stout, 100–150 cm, densely hirsute, not glaucous, rhizomes absent(?).

opposite or alternate, sessile or petiolate, with 1 or 2 stipular colleters on each side of petiole, also in axil;

petiole 0–2 mm, puberulent with curved trichomes;

blade linear to linear-lanceolate, 5–18 × 0.2–1 cm, chartaceous, base cuneate, margins entire, apex acute to attenuate, sometimes mucronate, venation brochidodromous, surfaces scabridulous to puberulent with curved trichomes, especially on veins, margins ciliate, laminar colleters absent.

opposite, petiolate, with 1 stipular colleter on each side of petiole;

petiole 1–5 mm, hirsute;

blade oval or oblong to ovate, 7–22 × 3–14 cm, subsucculent, base truncate to subcordate, margins entire, apex obtuse to truncate or emarginate, mucronate, venation brochidodromous, secondary veins nearly orthogonal, surfaces hirsute, margins ciliate, 8–16 laminar colleters.

terminal and extra-axillary at upper nodes, sessile or pedunculate, 13–28(–36)-flowered;

peduncle 0–6 cm, puberulent with curved trichomes, with 1 caducous bract at the base of each pedicel.

terminal, paired, and extra-axillary, pedunculate, 21–53-flowered;

peduncle 6–13 cm, densely hirsute, with 1 caducous bract at the base of each pedicel.

9–16 mm, puberulent with curved trichomes.

13–22 mm, densely hirsute.

erect to spreading;

calyx lobes narrowly lanceolate, 1.5–2 mm, apex acute, puberulent with curved trichomes;

corolla white to greenish cream, purple at lobe tips, lobes reflexed, oblong, 3–5 mm, apex obtuse, glabrous;

gynostegial column 0.2–0.5 mm;

fused anthers green or brown, cylindric, 1–1.5 mm, wings triangular to trapezoidal, widest at middle, slightly open at tip, apical appendages ovate;

corona segments pinkish lavender to red-violet, often with white apex, often a darker red-violet stripe or at base, sessile, laminar, strongly dorsally compressed, margins incurved, appressed to column, curved to subsaccate, 2–2.5 mm, exceeding point of anther wings, greatly exceeded by style apex, apex obtuse to truncate, glabrous, internal appendage absent or obscure, glabrous;

style apex shallowly depressed, greenish cream to green.

erect to pendent;

calyx lobes lanceolate, 3.5–6 mm, apex acute, hirsute;

corolla cream to greenish cream or ochroleucous, sometimes tinged pink, lobes reflexed with spreading tips, elliptic, 9–11 mm, apex acute, glabrous;

gynostegial column 0.5–1 mm;

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

corona segments cream to ochroleucous, sometimes tinged pink, shiny, subsessile, conduplicate, 6–8 mm, equaling or exceeding style apex, apex truncate, spreading and tapering, glabrous, internal appendage laterally compressed, erect, barely exserted, glabrous;

style apex shallowly depressed, green or pink.

ovate, 11–12 × 7–8 mm, margin winged, faces smooth;

coma 4–5 cm.

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

coma 4–4.5 cm.

erect on upcurved pedicels, narrowly fusiform, 8–13.5 × 0.7–1.2 cm, apex attenuate, smooth, puberulent with curved trichomes.

erect on upcurved pedicels, lance-ovoid, 9.5–13.5 × 2–3 cm, apex attenuate, smooth, densely hirsute.