Flora of North America species comparison

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

1–3 mm wide, nodes knobby, joints exserted 0.8–1 mm.

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.

stipules linear-triangular, to 5 mm;

petiole 1–12(–20) × 0.4–0.6 mm, with low tubercles;

blade concolor, dark brown, bronze, or coppery, drying brownish olive, usually broadly oblong to oblong, ovate-oblong, or obovate-oblong, sometimes ovate, to 5 × 3 cm, resinous, base widely cuneate to slightly cordate, margins sharply dentate or sharply crenate-dentate, revolute, apex obtuse to rounded, surfaces glabrate, slightly scabrous, puberulent, and/or sparsely hispidulous with rays planar, almost lepidote, at times moderately dense finely pubescent, trichome rays 0.1–0.5 mm, densely subsessile-glandular, costal vein thick.

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.

subsessile glomerules on ultimate 5–7(–12) nodes;

peduncle 1 × 0.8 mm;

glomerules compact, 0.4–0.9 × 0.5–1.2 cm, 6–12-flowered, composed of terminal flower subtended by accessory shoots with simple elongate cincinnate dichasia;

bracteoles free, bracts subequal, narrowly elliptic, lanceolate, or linear, exterior lanceolate, interior linear, wider bracts 0.4–1.4 mm wide, apex acute, entire distally.

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).

sessile;

calyx 2–4.8 mm, hirsutulous and hirsute, tube 1.7–2.5 mm, lobes 1–2 mm;

petals bright yellow-orange, oblanceolate, obovate, or oblong, 2.5–4.8 × 0.7–1.3 mm, abaxially glabrous, adaxially subglabrous, densely papillose, with a few pilulose hairs, margins glabrous or very minutely stellate-puberulent, claw adherent for 0.3–0.7 mm to stamen tube base;

stamens 1.8–3.1 mm, uneven, tube at apex incised, arcuate, or truncate, yellow-papillose;

anthers 0.6–1 mm, base sagittate, ovate-dehisced;

pistil 2.6–3.5 mm;

ovary sericeous apically;

styles 1–1.5 × 0.1–0.2 mm, lateral, densely white-sericeous;

stigmas 20–40-branched, penicillate or distended-penicillate, obconic when dried, 0.8–1.4 × 1.2–1.5 mm, column 0.3–0.4 mm, branches 0.6–1 mm.

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.

obconic, transverse-truncate at apex, 1.7–2.4 × 1.5–1.7 mm, with dense white puberulent line at apical valve margin;

walls with endocarp corneous 1.6+ mm from apex, sometimes thin at base and along valve margins;

dehiscence usually 2-valvate, valve halves completely separate.

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

dull black, obovoid, 1.8–2.2 × 1.1–1.5 × 1.1 mm, apex with finely keeled linear low brown ridge, surface generally smooth but slightly pusticulate.

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