Flora of North America species comparison

solitary (or multiple as wound response), erect, straight;

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

multiple, erect or decumbent, zigzag;

branches along entire stem, distal longest, antrorse, straight to upcurved; hairy.

blade 37–120 × 5–24.4 mm, widest intersinus distance 4.8–19.6 mm;

proximal oblanceolate to elliptic, margins serrate, teeth 14–30, slightly antrorse, 0.6–4.9 mm;

distal elliptic to lanceolate, base not clasping, margins serrate, teeth 12–30, slightly antrorse, 0.7–4.7 mm;

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

blade 13.6–33.3 × 7.2–18.5 mm, widest intersinus distance 6.2–14.8 mm;

proximal elliptic, margins dentate, teeth 4–6, perpendicular to leaf axis, 0.5–0.6 × 1.2–1.5 mm;

distal oblanceolate to elliptic, base usually not clasping, rarely clasping, margins dentate to serrate, teeth 4–8, slightly antrorse or perpendicular to leaf axis, 0.6–2.5 mm;

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

margins pinnate.

margins entire or slightly toothed.

petals white, 22.6–49 × 3.6–10.3 mm, apex acute, glabrous abaxially, stamens white, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 20–47 × 3–10.2 mm, without anthers, second whorl without anthers;

anthers straight after dehiscence, epidermis smooth;

styles 11.5–18.5 mm.

petals golden yellow, 7.7–14.8 × 2.7–5.9 mm, apex acute, glabrous abaxially;

stamens golden yellow, 5 outermost petaloid, filaments narrowly spatulate, strongly clawed, 6–11 × 1.9–5.2 mm, with anthers, second whorl with anthers;

anthers straight after dehiscence, epidermis smooth;

styles 5.4–9.7 mm.

cylindric, 14.5–29 × 6.9–12.3 mm, base tapering or rounded, not longitudinally ridged.

cup-shaped, 4.2–8 × 4.9–7.6 mm, base rounded, not longitudinally ridged.

coat anticlinal cell walls wavy, papillae 4–8 per cell.

coat anticlinal cell walls straight, papillae 4–6 per cell.

= 20.