Flora of North America species comparison

solitary, erect to ascending, unbranched (rarely), (10–)20–125 cm, puberulent with curved trichomes, not glaucous, rhizomes absent.

1–15, prostrate, unbranched (rarely branched), 15–40 cm, densely puberulent with curved trichomes to tomentose, not glaucous, rhizomes absent.

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

petiole 0–5 mm, puberulent with curved trichomes;

blade linear to broadly oval or nearly orbiculate, 2–13 × 0.8–6 cm, chartaceous, base cuneate to rounded, margins entire or crisped, apex acute or obtuse to truncate or emarginate, mucronate, venation brochidodromous, surfaces sparsely pilosulous to glabrate, margins ciliate, laminar colleters absent.

opposite, petiolate, stipular colleters absent;

petiole 5–10 mm, densely puberulent with curved trichomes;

blade ovate to nearly orbiculate, 3.5–6 × 3–4 cm, subsucculent, base obtuse to cordate, margins entire, apex obtuse to acute or rounded, venation eucamptodromous, surfaces pilosulous, more densely so abaxially, especially on veins, becoming glabrate adaxially, margins inconspicuously ciliate, laminar colleters absent.

extra-axillary at upper nodes, sometimes branched at peduncle apex, sessile or pedunculate, 22–60-flowered;

peduncle 0–4 cm, puberulent with curved trichomes to pilosulous, with 1 caducous bract at the base of each pedicel.

terminal and extra-axillary, pedunculate, 20–55-flowered;

peduncle 1.5–9 cm, tomentose, with 1 caducous bract at the base of each pedicel.

7–13 mm, pilosulous.

10–13 mm, tomentose to pilose.

erect to pendent;

calyx lobes narrowly lanceolate, 2–3 mm, apex acute, pilosulous;

corolla green to yellowish green, sometimes tinged red, lobes reflexed, oblong, 5–7 mm, apex acute, inconspicuously pilosulous at apex abaxially, glabrous adaxially;

gynostegium sessile;

fused anthers green, cylindric, 3–4 mm, wings triangular, widest at middle, closed, apical appendages ovate, marginally inflexed, apically deflexed;

corona segments green to cream, sometimes tinged red, sessile, laminar, margins incurved, appressed to column, 3–4 mm, greatly exceeded by style apex, apex obtuse, glabrous, internal appendage absent or obscure, glabrous;

style apex shallowly depressed, green.

erect to spreading;

calyx lobes lanceolate, 2–3 mm, apex acute, pilose to tomentose;

corolla pale pink to red, lobes reflexed with spreading tips, oval, 5–6 mm, apex acute, glabrous;

gynostegium sessile;

fused anthers yellow to brown or green, broadly barrel-shaped, 1.5–2 mm, wings deltoid, widest at middle, closed, apical appendages ovate;

corona segments pinkish cream to cream, subsessile, conduplicate, dorsally rounded, spreading away from anthers, 2–3 mm, greatly exceeded by style apex, apex truncate, glabrous, internal appendage absent;

style apex shallowly depressed, cream to green.

ovate, 7–8 × 4–5 mm, margin winged, faces minutely rugulose;

coma 2.5–3 cm.

ovate, 6–8 × 5–6 mm, margin very narrowly winged, faces rugulose;

coma 2–2.5 cm.

erect on upcurved pedicels, fusiform to lance-ovoid, 6–10 × 1.5–2 cm, apex acuminate to attenuate, smooth, pilosulous.

erect on upcurved pedicels (at least until maturity), lance-ovoid, 6–10 × 2–3 cm, apex obtuse to acuminate, longitudinally ridged, pilosulose or tomentulose to glabrate.

= 22.