Flora of North America species comparison

erect;

branches red-brown, (often glaucous, dull), glabrous;

branchlets brownish, glabrous.

stipules foliaceous, apex acute to acuminate;

petiole convex to flat, or shallowly grooved adaxially, 2–6(–9) mm, pilose or villous adaxially;

largest medial blade narrowly to broadly elliptic or narrowly ovate to ovate, 25–92 × 10–45 mm, 1.5–2.6(–3.4) times as long as wide, base convex, cuneate, or rounded, margins slightly revolute or flat, shallowly serrulate or entire, apex acuminate, acute, or convex, abaxial surface glaucous, sparsely pubescent, hairs wavy, adaxial dull to slightly glossy, pilose, sparsely pubescent or glabrous, midrib hairy, (hairs white and ferruginous);

proximal blade margins entire or finely serrulate;

juvenile blade sometimes reddish, sparsely pubescent abaxially, hairs white, sometimes also ferruginous.

stipules absent or rudimentary;

petiole (deeply grooved), 1.3–10 mm, (glabrous adaxially);

largest medial blade (deciduous in autumn, 2 pairs of secondary veins arising at or close to base, arcing toward apex), elliptic, broadly elliptic, obovate, or subcircular, 5–32 × 7–18 mm, 1.1–2.8 times as long as wide, base convex, rounded, or cuneate, margins slightly revolute or flat, entire, ciliate, apex usually rounded or convex, sometimes retuse, abaxial surface (rarely glaucous), glabrous or pilose, adaxial slightly glossy, glabrous;

proximal blade margins entire;

juvenile blade glabrous.

adaxial nectary oblong or square, 0.3–0.7 mm;

filaments distinct or basally connate, glabrous;

anthers purple turning yellow, 0.4–0.6 mm.

abaxial nectary 0.3–0.7 mm, adaxial nectary oblong, narrowly oblong, square, or ovate, 0.5–1.4 mm, nectaries distinct;

filaments usually distinct, sometimes connate proximally, glabrous;

anthers ellipsoid or ovoid, 0.4–0.6 mm.

adaxial nectary square or obovate, 0.3–0.6 mm, usually shorter than stipe;

stipe 0.4–1.2 mm;

ovary pyriform, glabrous, beak gradually tapering to styles;

ovules 12–22 per ovary;

styles connate (sometimes distinct 1/2 their lengths), 0.2–0.5 mm;

stigmas flat, abaxially non-papillate with rounded tip, or broadly cylindrical, or 2 plump lobes, 0.2–0.32–0.44 mm.

abaxial nectaries absent, adaxial nectary narrowly oblong, oblong, or ovate, 0.8–1.8 mm, longer than stipe;

stipe 0.2–0.7 mm;

ovary obclavate or pyriform, densely villous to pilose, hairs flattened, beak gradually tapering to or slightly bulged below styles;

ovules 12–17 per ovary;

styles connate to distinct 1/2 their lengths, 0.7–1.2 mm;

stigmas flat, abaxially non-papillate with pointed tip, or slenderly to broadly cylindrical, 0.3–0.6(–0.7) mm.

3.2–8 mm.

4.8–8.25 mm.

flowering as leaves emerge; staminate slender, stout, or subglobose, 14.5–34.5 × 8–12 mm, flowering branchlet 1–7 mm; pistillate moderately densely or loosely flowered, slender or stout, 21–59 × 6–16 mm, flowering branchlet 1.5–9 mm;

floral bract brown or bicolor, 1.2–1.8 mm, apex acute to rounded, abaxially glabrate to hairy, hairs straight to wavy.

sometimes from subterminal buds; staminate 9–34 × 6–12 mm, flowering branchlet 1.5–14 mm; pistillate densely or moderately flowered (more than 15 flowers), stout to globose, 10–50 × 7–13 mm, flowering branchlet 1–12 mm;

floral bract brown, black, or bicolor, 1.5–2.5 mm, apex rounded or convex, entire, abaxially sparsely hairy, hairs straight or wavy, (exceeding bract by 0.6–1.12–1.8 mm).

= 38.

= 76, 114.