Flora of North America species comparison

to 8 mm wide, nodes even or extended to 0.5 mm.

unarmed, hairy, hairs stellate and/or simple, sometimes also glandular.

stipules linear-triangular, 3–6 mm;

petiole 2.5–5 cm × 1–4 mm;

blade concolor or discolor, drying olive, ovate-oblong to lanceolate, to 7(–10) × 5 cm, base subcordate to obtuse, margins crenate-serrate, serrate, irregularly serrate, or crenate-dentate, apex narrowly rounded, obtuse, or subacute, surfaces tomentose or pubescent, trichome rays 0.4–1 mm, and sparsely hispidulous, slightly scabrous or not.

petiolate;

stipules deciduous, narrowly triangular or linear-triangular;

blade: margins dentate, serrate, or crenate.

subsessile, or on short pedunclelike lateral branches to 3.6 cm, glomerules 5–20 along stems, compact, often dense, sympodial, at times lax clusters with terminal flower and subtending dichasia;

bracteoles free or with 1 adherent to stipule forming an elliptic 2-cuspidate foliole at glomerule base, bracts subequal, lanceolate or linear, 0.3–1.5 mm wide, apex acute, entire.

axillary, cincinni in double or compound dichasial clusters, glomerulate, or paniculiform, 5–40-flowered;

epicalyx absent;

bracts 4, unilateral subtending floral pair, unequal or subequal.

sessile or subsessile;

calyx 4.2–setose apically;

styles 0.9–1.7 × 0.1–0.3 mm, lateral or excentric, broader and stellate-hirsute distal to base;

stigmas 12-branched, plumose (1.2–1.4 × 0.5–0.8 mm, column 0.9–1.2 mm, branches to 0.7 mm) or dissolute-penicillate (0.6–1.2 × 0.7–1.6 mm, column 0.4–0.7 mm, branches to 1.1 mm).

sweet-smelling, sessile or subsessile, homostylous [mostly distylous];

sepals connate 1/2–2/3 length, nectary present;

petals late-deciduous, pale yellow, bright yellow, or yellow-orange, usually darker in corolla throat, spatulate, clawed [rarely not clawed], lamina obovate, oblong, oblanceolate, or obtriangular;

androgynophore absent or present, to 0.7 mm;

stamens connate most of length [connate basally to entirely];

anthers 2-thecate, oblong or ovate;

staminodes 0;

ovary 1-locular, obovoid or obconic, stipitate or not;

ovules 2 per locule;

styles included, cylindric;

stigmas 10–40-branched, apex slightly exserted above stamen apices and corolla.

capsules, 1-locular, obconic, obovoid, or oblique, apically hairy, dehiscence partially or completely loculicidal.

oblique, obconic, or obovoid, 2.1–3 × 1.5–2 mm, walls with endocarp corneous for 1+ mm from apex, sometimes merely membranous along one or both valve margins laterally; partially apically dehiscent to 2-valvate.

dark brown, obovoid or obconic, 2–2.2 × 1.2–1.5 × 1–1.3 mm, smooth.

1(or 2) per locule, brown or black, slightly laterally compressed, obovoid, obconic, or oblique, smooth or minutely granulate;

endosperm present;

cotyledons oblate [widely elliptic to elliptic, circular].

= 5, 6, 7, 10, 13.

= 24, 26 (India), 40 (Africa).