Flora of North America species comparison

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

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

blade 28–70 × 5.8–17.2 mm, widest intersinus distance 3.4–11.4 mm;

proximal oblanceolate, lanceolate, or elliptic, margins dentate to pinnate, teeth or lobes 10–20, perpendicular to leaf axis, 0.9–3.1 mm;

distal lanceolate, base usually not clasping, rarely clasping, margins usually dentate, occasionally serrate, teeth 8–18, usually perpendicular to leaf axis, occasionally slightly antrorse, 0.6–5.4 mm;

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

margins entire or toothed.

petals white, 14.7–22(–24.4) × 1.9–4.4 mm, apex acute, glabrous abaxially;

stamens white, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 13.3–23.1 × 1.3–3.1(–4.4) mm, without anthers, second whorl without anthers;

anthers straight after dehiscence, epidermis smooth;

styles 7.6–12.9 mm.

cup-shaped to cylindric, 10.2–20.1 × 6.7–9.6 mm, base rounded to occasionally tapering, not longitudinally ridged.

coat anticlinal cell walls wavy, papillae 3–8 per cell.

= 20.