Flora of North America species comparison

solitary, erect, straight;

branches distal or along entire stem, ± equal, perpendicular to stem, especially proximal and mid-stem, or slightly antrorse, especially distal, straight; hairy.

blade 38.1–95 × 6–17(–26) mm, widest intersinus distance 1.6–4.7 mm;

proximal oblanceolate, lanceolate, or elliptic, margins dentate to serrate or pinnate, teeth or lobes 10–22, slightly antrorse or perpendicular to leaf axis, 2–6.8 mm;

distal elliptic to lanceolate, base not clasping, margins dentate to serrate or pinnate, teeth or lobes 8–16, slightly antrorse or perpendicular to leaf axis, 2.4–8.5 mm;

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

persisting;

petiole present or absent;

blade linear-lanceolate to linear, margins usually irregularly deeply lobed, lobes pointed.

petiole absent;

blade ovate-lanceolate to linear, to 15(–22) cm, margins few-lobed or entire.

green, ovate to ovate-lanceolate, 2.9–8.2 × 1.1–1.9 mm, width 1/8–1/2 length, not concealing capsule, margins entire.

margins entire.

sepals 2–6 mm;

petals yellow to orange proximally, yellow distally, 3–8 mm, apex rounded or acute apex;

stamens 20–40, 2–7 mm, filaments monomorphic, filiform, unlobed;

styles 2–6 mm.

petals golden yellow, 8.3–14.5(–17.2) × 1.7–5.3 mm, apex acute to rounded, hairy abaxially;

stamens golden yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 4.9–12.5 × 1.2–3.8 mm, with or without anthers, second whorl with anthers;

anthers occasionally twisted or straight after dehiscence, epidermis papillate or not;

styles 5.4–10.4 mm.

clavate, 11–31 × 1.5–3 mm, axillary curved to 250° at maturity, usually inconspicuously longitudinally ribbed.

cup-shaped, 5–9 × 3.7–6.5 mm, base rounded, not longitudinally ridged.

15–50, in 2+ rows distal to mid fruit, tan, usually not, occasionally sparsely, dark-mottled, usually irregularly polygonal, occasionally triangular prisms proximal to mid fruit, surface colliculate under 10x magnification; recurved flap over hilum absent;

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 to slightly wavy, papillae 6–11 per cell.

= 36.

= 20.