Flora of North America species comparison

1 or 2 (rarely more), erect to spreading, rarely branched, 15–85 cm, puberulent with curved trichomes, not glaucous, rhizomes absent.

1–16, prostrate to decumbent, unbranched, 8–25 cm, glabrous, glaucous, rhizomes absent.

alternate, subopposite, or opposite, sessile or petiolate, with 1 stipular colleter on each side of petiole;

petiole 0–1 mm, spreading to ascending, glabrate;

blade linear, conduplicate, 5–16 × 0.1–0.5 cm, chartaceous, base cuneate, margins entire, apex acute, venation faintly brochidodromous to obscure, surfaces sparsely puberulent with curved trichomes, especially on midvein, to glabrate, margins ciliate, laminar colleters absent.

opposite, sessile or petiolate, stipular colleters absent;

petiole 0–8 mm, glabrous, sometimes with a few long hairs at the base;

blade broadly ovate or oval to orbiculate or obovate, 3–7 × 1.8–6 cm, subsucculent, base cuneate or obtuse to cordate or truncate, margins entire, apex rounded to obtuse or acute, mucronate, venation eucamptodromous to faintly brochidodromous, surfaces glabrous, sometimes sparsely strigose on midvein abaxially, glaucous, margins ciliate, laminar colleters absent.

extra-axillary, sessile or pedunculate, 9–28-flowered;

peduncle 0–1.3 cm, sometimes branched at apex, puberulent with curved trichomes, with 1 caducous bract at the base of each pedicel.

terminal, and usually extra-axillary at uppermost node, sessile, 3–10-flowered, with 1 caducous bract at the base of each pedicel.

5–12 mm, puberulent with curved trichomes to pilosulous.

16–35 mm, glabrous.

erect to pendent;

calyx lobes lanceolate, 1.5–2.5 mm, apex acute, puberulent with curved trichomes to pilosulous;

corolla pale green to greenish cream, lobes reflexed with spreading tips, elliptic, 3–5 mm, apex acute, minutely puberulent with curved trichomes at apex abaxially, glabrous adaxially;

gynostegial column 0–0.5 mm, fused anthers green, truncately obconic, 1.5–2 mm, wings narrowly crescent-shaped, wide open at base, apical appendages deltoid;

corona segments cream, often green-tinged, sessile, chute-shaped, margins incurved, appressed to anthers, 3–3.5 mm, equaling style apex, base saccate, auriculate, apex truncate, glabrous, internal appendage a short crest, the segment appearing 3-toothed, glabrous;

style apex shallowly depressed, green.

ascending to pendent, calyx lobes linear-lanceolate, 5–8 mm, apex acute, sparsely strigose to pilosulous;

corolla pale green to yellowish green, tinged red abaxially, lobes reflexed with spreading to ascending tips, oval, 8–14 mm, apex acute, glabrous abaxially, papillose at base and minutely hirtellous at tips adaxially;

gynostegium sessile;

fused anthers dark brown, sometimes green at apex, broadly cylindric, 1.8–3 mm, wings right-triangular with rounded apex, closed, apical appendages deltoid;

corona segments red-violet to pinkish purple, sessile, conduplicate, dorsally rounded, 5–8 mm, slightly exceeded by to exceeding style apex, base subsaccate, margins connivent, apex truncate, oblique, with recurved, papillose teeth, papillose, internal appendage absent;

style apex slightly depressed, pale green.

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

coma 2.5–3 cm.

ovate, 8–9 × 6–7 mm, margin very narrowly winged, faces rugulose;

coma 2–2.5 cm.

erect on straight pedicels, fusiform, 9–13 × 1–1.2 cm, apex long-acuminate, smooth, pilosulous.

sometimes paired, erect on upcurved pedicels, ovoid, 4.5–6 × 1.5–1.8 cm, apex apiculate, smooth, sometimes obscurely ribbed, glabrous, glaucous.