Flora of North America species comparison

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

internodes narrowly 4-winged at first, then 2-lined.

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).

blades oblong to elliptic-oblong, 20–40 × 12–20 mm, base not articulated, broadly cuneate, margins usually plane, rarely recurved, apex rounded to retuse, midrib with 6 pairs of branches.

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

terminal (1–)3–5(–8)-flowered, narrowly branched.

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.

15 mm diam.;

sepals tardily deciduous, not enclosing capsule, 5, spatulate to elliptic or ovate, unequal, 3–5 × 1.5–2.3 mm;

petals 5, coppery yellow, oblong, 8–10 mm length 2 times sepals;

stamens deciduous, 60–80;

ovary 3-merous, placentation incompletely axile.

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

cylindric-conic, 6–15 × 4.5–8 mm.

not or scarcely carinate, 0.6–0.8 mm;

testa linear-reticulate.

scarcely carinate, 1.8–2 mm;

testa finely scalariform-reticulate.

= 16.