Flora of North America species comparison

branches (sometimes highly brittle at base), yellow-brown or red-brown, not glaucous, glabrous or pilose;

branchlets yellow-brown, gray-brown, or red-brown, densely short-silky, velvety, or villous, (buds caprea-type or intermediate).

stipules absent or rudimentary on early ones, rudimentary or foliaceous on late ones, apex acute;

petiole convex to flat, or shallowly grooved adaxially, 3–13(–16) mm, tomentose or velvety adaxially;

largest medial blade elliptic, narrowly oblanceolate, oblanceolate, or obovate, 31–70–120 × 17–48 mm, 2.1–3.1–4 times as long as wide, base cuneate or convex, margins slightly revolute or flat, strongly revolute proximally, entire, irregularly serrate, or sinuate, (glands submarginal or epilaminal), apex acuminate or convex, abaxial surface not evidently glaucous, (obscured by hairs), densely short-silky, woolly, or silky-woolly, hairs straight, wavy, or curved, adaxial slightly glossy (sometimes dull and glaucous), pilose or moderately densely short-silky;

proximal blade margins entire or shallowly serrulate;

juvenile blade green, densely long-silky or woolly abaxially, (sparsely silky-tomentose adaxially), hairs white.

stipules absent or rudimentary;

petiole shallowly to deeply grooved adaxially, 3–13 mm, with pairs of spherical glands distally or throughout, glabrous adaxially;

largest medial blade hypostomatous or hemiamphistomatous, narrowly oblong, very narrowly elliptic, elliptic, lanceolate, or narrowly ovate, 43–110 × 9–33 mm, 2.4–6 times as long as wide, base convex or cuneate, margins flat, serrulate, apex acuminate, caudate, or acute, abaxial surface usually not glaucous, sometimes thinly so (appearing pale green), slightly glossy, glabrous, adaxial highly glossy, glabrous;

proximal blade margins serrulate or entire;

juvenile blade reddish or yellowish green, glabrous abaxially.

adaxial nectary narrowly oblong, oblong, ovate, or flask-shaped, 0.4–1.3 mm;

stamens 1;

filaments distinct, glabrous;

anthers purple turning yellow, shortly cylindrical, 0.5–0.7 mm.

abaxial nectary 0.5–1.1 mm, adaxial nectary oblong or ovate, 0.4–1.1 mm, nectaries distinct or connate and cup-shaped;

stamens 3–9;

filaments distinct or basally connate, hairy on proximal 1/2 or basally;

anthers ellipsoid or shortly cylindrical, 0.5–0.7 mm.

adaxial nectary square, ovate, or flask-shaped, 0.5–0.9 mm, shorter to longer than stipe;

stipe 0.4–1.4 mm;

ovary ovoid to pyriform, long- or short-silky or villous, beak sometimes slightly bulged below styles;

ovules 14–20 per ovary;

styles 0.4–0.8 mm;

stigmas flat, abaxially non-papillate with rounded tip, or broadly cylindrical, 0.16–0.28–0.4 mm.

adaxial nectary ovate, oblong, or flask-shaped, 0.3–1.1 mm, shorter than stipe;

stipe 1.2–2.4 mm;

ovary pyriform to obclavate, beak slightly bulged below or abruptly tapering to styles;

ovules 12–16 per ovary;

styles connate, 0.3–1 mm;

stigmas flat, abaxially non-papillate with rounded tip, or slenderly cylindrical, 0.4–0.7 mm.

3.5–5.6 mm.

7–12 mm.

flowering just before or as leaves emerge; staminate slender or stout, (17–)22–54 × 8–15 mm, flowering branchlet 1–9 mm; pistillate moderately densely flowered, slender to stout, 25–73(–115 in fruit) × 5–15 mm, flowering branchlet 1–20 mm;

floral bract tawny to dark brown, 1.4–2.4 mm, apex rounded or acute, abaxially hairy, hairs straight or wavy.

staminate (stout), 25–53 × 12–16 mm, flowering branchlet 5–14 mm; pistillate (fruiting in autumn, often persistent) moderately densely to loosely flowered, stout to globose, 17–42(–65 in fruit) × 11–22 mm, flowering branchlet 5–32(–65 in fruit) mm;

floral bract (sometimes greenish tawny), 1.2–4 mm, apex acute, rounded, or truncate, glandular-toothed, abaxially moderately densely hairy, hairs straight or wavy.

= 38.

= 76.