Flora of North America species comparison

multiple, erect, zigzag or straight;

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

glabrescent, smooth to touch.

blade 16–84 × 2.2–10.6 mm, widest intersinus distance 2.2–7 mm;

proximal oblanceolate, margins usually entire, occasionally dentate, teeth 0–6(–14), perpendicular to leaf axis, 1–2 mm;

distal elliptic, lanceolate, or linear, base not clasping, margins usually entire, rarely dentate, teeth 0(–6), perpendicular to leaf axis, 0.6–2 mm;

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

margins 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.

petals light to golden yellow, 7.8–11(–14.2) × 1.9–2.8(–4.2) mm, apex rounded, glabrous abaxially;

stamens white to light yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 5.9–9.2(–10.1) × 1.2–2.7 mm, with anthers, second whorl with anthers;

anthers twisted after dehiscence, epidermis smooth;

styles 5.2–7.6 mm.

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.

cup-shaped, 4.5–8.8 × 5.8–8.8 mm, base rounded, not longitudinally ridged.

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

coat anticlinal cell walls straight, papillae 15–24 per cell.

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.

= 22.

= 18.