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 or decumbent;

branches brownish, yellow-brown, gray-brown, or red-brown, villous or pilose to glabrescent;

branchlets yellow-brown or red-brown, sparsely to densely villous or tomentose to glabrescent.

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 (marcescent or not), foliaceous or rudimentary on early and late ones;

petiole (usually deeply to shallowly grooved adaxially), 1–27 mm, (much longer than subtended bud);

largest medial blade usually hypostomatous, sometimes hemiamphistomatous or amphistomatous, usually narrowly elliptic, elliptic, usually oblanceolate or obovate, sometimes narrowly oblong or obovate, 27–82 × 6–39 mm, 1.4–4.8 times as long as wide, base usually cuneate or convex, sometimes rounded, rarely subcordate, margins slightly revolute or flat, usually entire, apex acute, acuminate, convex, or rounded, abaxial surface densely villous or villous-silky, tomentose, short- or long-silky, or pilose, hairs usually wavy or straight, sometimes curved, adaxial usually slightly glossy, sometimes dull, moderately densely villous, pilose, or long-silky to glabrescent;

proximal blade margins entire or serrulate;

juvenile blade sparsely or densely villous, tomentose, or long-silky abaxially.

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 0.1–1 mm, adaxial nectary narrowly oblong, oblong, square, ovate, or flask-shaped, 0.5–1.3 mm, nectaries distinct, or connate and cup-shaped;

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

anthers 0.4–0.8 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 absent, adaxial nectary usually narrowly oblong, oblong, or ovate, sometimes flask-shaped, 0.4–1.8 mm, shorter to longer than stipe;

stipe 0.3–2.8 mm;

ovary pyriform or obclavate, densely villous, tomentose, short-silky, or pubescent, beak usually gradually tapering to styles, sometimes gradually tapering to or slightly bulged below styles;

ovules 6–22 per ovary;

styles connate to distinct 1/2 their lengths or more, 0.3–1.6 mm;

stigmas flat, abaxially non-papillate with rounded tip, or slenderly or broadly cylindrical, 0.2–0.8 mm.

5–9 mm.

4.5–9 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.

staminate 14–53 × 5–17 mm, flowering branchlet 1–25 mm; pistillate densely to sometimes loosely flowered, slender, stout, subglobose, or globose, 15–83 × 7–21 mm, flowering branchlet 2–37 mm;

floral bract tawny, brown, bicolor, or greenish, 1–3.4 mm, apex convex or rounded, entire, abaxially hairy, hairs wavy, crinkled, or straight.

= 38.

= 76, 95, 114, 152.