Flora of North America species comparison

multiple, erect or decumbent, straight;

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

blade (13.5–)16.4–33.3 × 1.5–8.8 mm, widest intersinus distance 1.5–6.1 mm;

proximal oblanceolate to spatulate, margins entire or pinnate, lobes 0–8 (always some leaves with 5+ lobes), perpendicular to leaf axis, 0.5–2 mm, always some more than 1.4 mm;

distal oblanceolate, elliptic, lanceolate, or linear, base not clasping, margins entire, dentate, or pinnate, teeth or lobes 0–6, perpendicular to leaf axis, 0.1–2 mm;

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

persisting;

petiole present or absent;

blade linear-lanceolate to linear, margins very deeply lobed, lobes slender.

petiole absent;

blade ovate-lanceolate to linear, to 15 cm, margins deeply to shallowly lobed or entire.

green, ovate to lanceolate, 4.8–12.4 × 0.9–3.5 mm, width 1/8–1/2 length, not concealing capsule, margins usually entire, rarely 2-lobed.

margins entire.

sepals (7–)9–16 mm;

petals yellow, 12–25 mm, apex acute or mucronate;

stamens 20+, 3–10 mm, filaments monomorphic, filiform, unlobed;

styles 7–15 mm.

petals golden yellow, 7.2–11.9 × 2.7–4.9 mm, apex acute to rounded, glabrous abaxially;

stamens golden yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 5.5–10.3 × 1.4–2.7 mm, with anthers, second whorl with anthers;

anthers usually twisted after dehiscence, epidermis papillate;

styles 5–9 mm.

clavate, 19–40 × 2–3.5 mm, axillary curved to 270° at maturity, usually inconspicuously longitudinally ribbed.

cup-shaped, 4.9–7.6 × 3.4–5.5 mm, base rounded to tapering, not longitudinally ridged.

30–60, in 2+ rows distal to mid fruit, tan, usually dark-mottled, usually irregularly polygonal, occasionally triangular prisms proximal to mid fruit, surface colliculate under 10x magnification; recurved flap over hilum usually present;

seed coat cell outer periclinal wall domed, domes on seed edges less than 1/2 as tall as wide at maturity.

coat anticlinal cell walls straight, papillae 5–8 per cell.

= 18.

= 22.