Flora of North America species comparison

solitary, erect, straight;

branches distal, distal longest, antrorse, straight; hairy.

erect, to 50 cm.

blade 31–92(–157) × 10.5–27.6(–41) mm, widest intersinus distance 5.2–23.3(–29) mm;

proximal lanceolate or elliptic, margins serrate to pinnate, teeth or lobes 8–22, slightly antrorse, 1.8–6 mm;

distal lanceolate, base clasping, margins usually serrate to pinnate, occasionally entire, teeth or lobes (0–)10–20, slightly antrorse, 1.4–7.6 mm;

abaxial surface with simple grappling-hook, complex grappling-hook, and needlelike trichomes, adaxial surface with simple grappling-hook and needlelike trichomes.

petiole to 3 mm (proximal leaves), absent (distal leaves);

blade ovate to hastate, rarely elliptic, basally lobed or unlobed, to 10 × 5 cm, base usually cuneate to truncate, sometimes acute, margins usually serrate, sometimes crenate, rarely entire, apex acute.

margins entire.

(fruiting) 0–2.5 × 2 mm.

petals golden yellow, 5.7–9.2 × 1.3–3 mm, apex usually acute, occasionally rounded, glabrous abaxially;

stamens golden yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 4.7–8.4 × 1–2.4 mm, without anthers, second whorl with anthers;

anthers straight after dehiscence, epidermis smooth;

styles 3.5–5.4 mm.

petals orange, (6–)8–18.5 × (3–)4–10.5 mm, apex cuspidate, hairy abaxially on distal 1/2;

stamens 15–45, 5–9.5 mm, filaments monomorphic, filiform;

styles 5–10 mm.

cylindric, 13.6–23.5 × 5.1–7.8 mm, base tapering, not or slightly longitudinally ridged.

subcylindric to clavate, (5–)7–17 × 2–3.5 mm, base tapering gradually, capsule and pedicel not well-differentiated, walls thick, woody.

coat anticlinal cell walls straight, papillae 4–17 per cell.

(1–)2–3(–4) per capsule, oblong, without transverse folds.

= 22.

= 20, 22.