Flora of North America species comparison

internodes 2–4-lined.

sometimes clustered, internodes not lined, with black glands scattered all over.

blades narrowly elliptic or narrowly oblong to linear, 30–70 × 3–15 mm, base not articulated, narrowly cuneate to linear, margins plane to revolute, apex subacute to rounded, midrib with 0–4 pairs of branches.

usually ascending, sometimes spreading, sessile;

blade usually ovate-lanceolate to triangular-lanceolate or narrowly elliptic, rarely ovate, 18–45 × 6–16(–20) mm, base cordate to rounded, margins plane, apex usually acute, rarely obtuse to rounded, midrib with 3–4 pairs of branches, tertiary veins densely reticulate toward margins, black glands intramarginal (dense) and laminar (scattered).

rounded-corymbiform, 7–70-flowered, narrowly branched, sometimes with dichasia or branches from to 8 proximal nodes.

subcorymbiform to broadly pyramidal, 16–164(–280)-flowered, subsidiary branches ascending to widely spreading.

10–15 mm diam.;

sepals persistent, not enclosing capsule, 5, broadly ovate to oblong-elliptic, ± unequal, 2.5–5 × 1.5–3 mm;

petals 5, bright yellow, oblanceolate-elliptic to elliptic, 5–9 mm;

stamens persistent, 45–85;

ovary 3-merous, placentation parietal.

10–20 mm diam.;

sepals not imbricate, erect in fruit, lanceolate to ovate or elliptic-oblong, subequal, (3–)3.7–4.9(–6) mm, apex acute;

petals yellow, usually obovate, rarely elliptic, 6–14 mm;

stamens 38–61;

anther gland amber or pellucid;

styles 5.4–8.5 mm.

broadly ovoid to depressed-globose, 4.5–8 × 4–7 mm.

broadly ovoid, 3–6 × 2–4 mm, with longitudinal and lateral vittae or vesicles or only ovoid vesicles (all amber).

carinate, 2–2.7 mm;

testa coarsely reticulate.

not or scarcely carinate, 0.6–0.8 mm;

testa linear-reticulate.

= 16.