Flora of North America species comparison

erect;

branches yellow-green, yellow-brown, or gray-brown, glabrous;

branchlets yellow-brown or red-brown, glabrous;

branches and branchlets sometimes weakly glaucous.

branches yellow-brown or red-brown, not glaucous, glabrous;

branchlets yellow-brown or red-brown, densely pubescent or tomentose.

(marcescent but not skeletonized), stipules usually absent or rudimentary, rarely present on late ones;

petiole (convex, or shallowly to deeply grooved, flat), 0.4–4.6(–5.5) mm, (glabrous adaxially);

largest medial blade (2 pairs of secondary veins arising at or close to base, arcing toward apex) broadly elliptic, subcircular, or circular, 1.9–16.3 × 3–10.5 mm, 0.84–1.17(–2.53) times as long as wide, base rounded or convex, margins flat, entire, ciliate, apex retuse, rounded, convex, or acute, abaxial surface glabrous, adaxial highly glossy, glabrous;

proximal blade margins entire;

juvenile blade glabrous or puberulent.

stipules absent or rudimentary on early ones;

petiole shallowly grooved adaxially, 2–5 mm, tomentose or velvety adaxially;

largest medial blade linear, narrowly oblong, narrowly oblanceolate, or narrowly elliptic, 5–160 × 3–10(–20) mm, base cuneate, margins strongly or slightly revolute, entire or serrulate, (glands submarginal or epilaminal), apex acuminate or acute, abaxial surface glaucous, densely tomentose or woolly, (midribs yellowish, prominent), hairs appressed, curved, adaxial dull or slightly glossy, sparsely pubescent to glabrescent;

proximal blade margins entire;

juvenile blade yellowish green, densely tomentose abaxially, hairs white or gray.

abaxial nectary 0.5–1 mm, adaxial nectary narrowly oblong or oblong, 0.8–1.4 mm, nectaries distinct;

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

anthers ellipsoid or globose, 0.4–0.6 mm.

adaxial nectary oblong or square, 0.3–0.9 mm;

filaments connate less or more than 1/2 their lengths;

anthers yellow, 0.5–0.7 mm.

abaxial nectary present or absent, adaxial nectary usually narrowly oblong or oblong, sometimes flask-shaped, 0.8–2 mm, longer than stipe;

stipe 0.4–0.8 mm;

ovary pyriform, glabrous or puberulent, (hairs in patches, especially on beak), beak slightly bulged below styles;

ovules 7–17 per ovary;

styles connate or slightly distinct distally, 0.5–1 mm;

stigmas flat, abaxially non-papillate with pointed tip, or slenderly or broadly cylindrical, 0.28–0.6 mm.

adaxial nectary oblong or square, 0.3–0.7 mm;

ovary obclavate, beak gradually tapering to styles;

ovules 2 per ovary;

styles 0.7–0.9 mm.

3.8–8.3 mm.

3–5 mm.

from subterminal buds; staminate subglobose, stout, or indeterminate, 3.3–18.5 × 2.5–12 mm, flowering branchlet 0.5–9 mm; pistillate moderately densely to loosely flowered (2–15 flowers), stout, subglobose, globose, or indeterminate, 4.5–35 × 2–17 mm, flowering branchlet 0.5–22 mm;

floral bract brown, 1.6–2.8 mm, apex rounded or retuse, entire, abaxially sparsely hairy or ciliate, hairs usually wavy, crinkled or curly, rarely straight.

flowering just before or as leaves emerge; staminate stout or slender, 26–34 × 6–10 mm, flowering branchlet 1–1.5 mm; pistillate moderately to very densely flowered, slender or stout, 19–40 × 3–10 mm, flowering branchlet 0.3–3.5 mm;

floral bract light brown or tawny, 1.5–4 mm, apex rounded, truncate, or acute, entire or toothed, abaxially hairy, hairs straight.

= 38.