Flora of North America species comparison

solitary, erect, straight;

branches distal or along entire stem, distal or proximal longest, antrorse, straight, proximal not decumbent; hairy or glabrescent.

blade (23–)29–78.4 × 3–14.6 mm, widest intersinus distance 1.6–8.5 mm;

proximal oblanceolate or elliptic, margins dentate to serrate, teeth 4–12, proximal sides slightly antrorse, distal sides perpendicular to leaf axis, 0.8–5.3 mm;

distal oblanceolate, elliptic, lanceolate, or linear, base not clasping, tapered, margins usually dentate to serrate, rarely entire, teeth (0–)2–10, proximal sides antrorse, distal sides perpendicular to leaf axis, 0.4–5.3 mm;

abaxial surface with simple grappling-hook, complex grappling-hook, and needlelike trichomes, largest trichomes with pearly white bases, 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.

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, 8.6–13.9(–17.4) × 2.9–4.7(–6.1) mm, apex rounded, glabrous abaxially;

stamens golden yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 6.7–13.2(–15.4) × 1.7–4.3 mm, usually without, rarely with, anthers, second whorl with anthers;

anthers straight after dehiscence, epidermis smooth;

styles 4.8–11.3 mm.

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

cup-shaped, 6.2–11.4(–13) × 6–8.4 mm, base rounded, 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 wavy, papillae 5–13 per cell.

= 18.

= 20.