Flora of North America species comparison

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

persistent or tardily deciduous, (base not articulated).

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).

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

6–35 mm diam.;

sepals persistent, 5;

petals persistent, 5;

stamens persistent, 20–109, in 5 fascicles, fascicles connate as 2 + 2 + 1;

ovary 3(–4)-merous;

placentation axile;

styles spreading, bases distinct;

stigmas relatively small.

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

not or slightly carinate.

not or scarcely carinate, 0.6–0.8 mm;

testa linear-reticulate.

22 (8, including 1 hybrid, in the flora): North America, Mexico, West Indies, Central America, South America.

= 16.