Flora of North America species comparison

erect, simple or sometimes branched distally, 1–10 dm, glabrous (rarely sparsely stipitate-glandular or pubescent near nodes);

rhizomes slender;

bulblets absent.

erect, usually simple, 3–10 dm, usually sparsely pubescent, at least at nodes (or glabrous);

rhizomes slender to somewhat thickened;

bulblets absent.

opposite or whorled near stem apex, dimorphic;

distal petioles absent or 0.1–0.7 cm, proximal 0.3–2(–3.5) cm, ciliate proximally, cilia 0.3–1.2(–2) mm;

distal blades narrowly elliptic to elliptic-lanceolate or linear-lanceolate, proximal blades broadly elliptic or lanceolate, distal 3–18 × 0.2–1.6 cm, proximal 2–5 × 0.6–1.8 cm, bases of distal leaves cuneate, decurrent, bases of proximal leaves rounded to obtuse or cuneate, decurrent, margins entire (rarely serrulate), plane, ciliolate proximally, apex rounded to acute or acuminate, surfaces not punctate, glabrous;

venation pinnate-arcuate.

whorled;

petiole absent or 0.1–0.3 cm, eciliate;

blade elliptic to lanceolate or ovate, 3–12 × 0.8–3.5(–4.5) cm, base cuneate or rounded, slightly decurrent, margins entire, plane, glabrous or sometimes sparsely pubescent, apex acuminate or acute (rarely obtuse), surfaces densely to sparsely punctate, pubescent at least along abaxial veins and margins;

venation pinnate-arcuate.

axillary, solitary flowers.

axillary in leaves (distalmost axils sometimes without flowers), solitary flowers.

1–5 cm, glabrous to sparsely stipitate-glandular (rarely pubescent).

1.5–3 cm, sparsely pubescent.

sepals 5, calyx not streaked, 3.5–8(–10) mm, glabrous or stipitate-glandular, lobes narrowly lanceolate to ovate, margins thin;

petals 5, corolla yellow, sometimes with slightly reddish base, not streaked, rotate, 4–10 mm, lobes with margins slightly erose apically, apex apiculate or mucronate, sparsely stipitate-glandular adaxially;

filaments distinct or nearly so, shorter than corolla;

staminodes 0.7–1 mm.

sepals 5, calyx streaked with dark resin canals, 3–6 mm, slightly stipitate-glandular, lobes lanceolate, margins thin;

petals 5, corolla yellow with reddish base and, sometimes, margins, streaked with black or maroon resin canals, rotate, 5–8 mm, lobes with margins entire, apex acute to rounded, stipitate-glandular adaxially;

filaments connate ca. 1.7 mm, shorter than corolla;

staminodes absent.

2–5 mm, usually not punctate, glabrous or slightly stipitate-glandular distally.

3–3.5 mm, sometimes dark-punctate, glabrous.

= 34.

= 84.