Flora of North America species comparison

branches divaricate, sometimes ± brittle at base, yellow-brown to dark red-brown, not or weakly glaucous, pilose to glabrescent, peeled wood often with very dense striae, to 25 mm;

branchlets yellow-green or red-brown, moderately to very densely villous to glabrescent.

erect;

branches red-brown to violet, (sometimes weakly glaucous), glabrous;

branchlets yellow-brown or red-brown, glabrous.

stipules rudimentary or absent on early ones, apex acute, acuminate, or convex;

petiole convex to flat adaxially, 2–5.5–13 mm, pubescent adaxially;

largest medial blade narrowly oblong, narrowly elliptic, elliptic, oblanceolate, or obovate, 20–44–87 × 10–16–45 mm, base cuneate, convex, or rounded, margins flat, entire, crenate, or irregularly serrate, glands submarginal, apex acute, acuminate, or convex, abaxial surface glaucous, moderately densely pubescent or long-silky to glabrescent, hairs white or gray, wavy, adaxial finely impressed-reticulate, dull or slightly glossy, moderately densely pubescent, sparsely short-silky, or glabrescent, hairs white or gray;

proximal blade margins entire, gland-dotted;

juvenile blade yellowish green or reddish, pilose or sparsely to moderately densely tomentose or long-silky abaxially, hairs white.

stipules absent;

petiole (convex or flat to deeply grooved adaxially), 1.5–6(–7) mm;

largest medial blade (2 pairs of secondary veins arising at or close to base, arcing) circular, subcircular or broadly elliptic, 6–21(–34) × 6–17(–31) mm, 0.9–1.4 times as long as wide, base usually subcordate or cordate, sometimes convex or rounded, margins flat, crenulate or crenate, apex rounded, convex, retuse, or toothed, abaxial surface (not glaucous), glabrous, adaxial slightly glossy to almost dull, glabrous;

proximal blade margins crenulate;

juvenile blade glabrous.

adaxial nectary oblong or ovate, 0.3–0.8 mm;

filaments distinct or connate less than 1/2 their lengths, glabrous or hairy on proximal 1/2;

anthers yellow or purple turning yellow, ellipsoid or shortly cylindrical, 0.5–0.8 mm.

abaxial nectary 0.5–0.8 mm, adaxial nectary oblong or ovate, 0.6–1.1 mm, nectaries distinct, or connate and shallowly cup-shaped;

filaments distinct, glabrous, or hairy on proximal 1/2;

anthers shortly cylindrical or globose, 0.3–0.6 mm.

adaxial nectary oblong or square, 0.3–0.8 mm;

ovary obclavate, beak slightly bulged below styles (long-beaked);

ovules 6–16 per ovary;

styles 0.1–0.4 mm;

stigmas slenderly to broadly cylindrical.

abaxial nectary (0–)0.2–0.3 mm, adaxial nectary narrowly oblong or oblong, 0.3–1.1 mm, longer or shorter than stipe, nectaries distinct or connate and shallowly cup-shaped;

stipe 0.3–1.1 mm;

ovary pyriform or ovoid, glabrous, beak abruptly tapering to styles;

ovules 11–18 per ovary;

styles connate to distinct, 0.2–0.4 mm;

stigmas broadly cylindrical or 2 plump lobes, 0.08–0.24–0.32 mm.

5–9 mm.

2.2–7.5 mm.

staminate flowering just before leaves emerge, pistillate flowering as leaves emerge; staminate stout to globose, 10–42 × 7–16 mm, flowering branchlet 0.5–11 mm; pistillate loosely flowered, stout, slender, or subglobose, 16.5–85 × 9–32 mm, flowering branchlet 1–26 mm;

floral bract tawny, 1.2–3.2 mm, apex rounded, abaxially hairy to glabrescent, hairs straight or wavy.

from subterminal buds; staminate 3–7.5 × 1.5–5 mm, flowering branchlet 0.3–2 mm; pistillate loosely flowered (2–11 flowers), stout to globose, 3.3–13 × 2–10 mm, flowering branchlet 0.8–3.5 mm;

floral bract tawny, light rose, or brown, 0.5–1.5 mm, margins ciliate, apex rounded, retuse, or truncate, entire, abaxially glabrous.

= 38.

= 38.