Flora of North America species comparison

with spherical or elongate tuberous thickenings 0.5–2.5 cm.

without tuberous thickenings or fleshy storage roots.

4-angled, 12–45(–60) cm, glabrous or stipitate-glandular throughout or at least in inflorescence, often densely so.

4-angled, 15–30 cm, pubescent in thin internodal line.

blades linear to linear-lanceolate or broadly lanceolate, (1.5–)2–10(–15) × 0.2–1.5(–2) cm, margins flat to briefly revolute, ± smooth or granular to serrulate, glabrous or stipitate-glandular.

blades lanceolate to lance-elliptic, 6–12 × 0.8–1.2 cm, margins often revolute, smooth or granular, sometimes papillate, sparsely ciliate proximately, glabrous or margins and midrib (adaxial) ciliolate.

open cymes, flowers often proliferating with age.

paired flowers (single by abortion) in distal 3–7 axils or in terminal cymes.

recurved to reflexed from base in fruit, uniformly stipitate-glandular.

recurved to reflexed from base in fruit, with thin internodal line of pubescence.

sepals lanceolate to narrowly ovate, 3–5.5(–7) × 0.8–2 mm, stipitate-glandular, often densely so;

petals 7–9.5 × 3–4 mm, apex notch 1–2 mm deep, lobes broadly rounded;

anthers 10, purple;

styles 3.5–4.5 mm;

stigmas terminal, 0.1–0.2 mm.

sepals narrowly ovate to lanceolate, 6.5–7 × 1.5–2.5 mm, essentially glabrous or margins ciliolate in proximal 1/2;

petals 8–9 × 1.5–2 mm, apex notch 0.8–1 mm deep, lobes narrowly rounded;

anthers 5, yellow;

styles 3.5–4 mm;

stigmas adaxial, linear, 2.5–3 mm.

4.5–5 mm.

4–4.5 mm.

1–3, reddish brown, broadly elliptic, ± plump, 2–3.4 mm;

tubercles conic to elongate, rounded.

1–2, reddish brown, circular, plump, 2.5–2.6 mm;

tubercles broadly conic to elongate, rounded, each with 8–12+ stipitate glands smaller than ca. 0.015 mm (50x).

= 96.