Flora of North America species comparison

branches (highly brittle or not at base), red-brown to violet, usually glaucous, glabrous;

branchlets yellow-brown, (strongly glaucous or not), glabrous, sparsely velvety, or tomentose.

stipules absent, rudimentary, or foliaceous on early ones, foliaceous on late ones (apex acuminate);

petiole 1.5–8 mm, glabrous adaxially;

largest medial blade lorate, narrowly oblong, narrowly elliptic, narrowly oblanceolate, or linear, 30–133 × 5–20 mm, 3.4–8–15 times as long as wide, base cuneate or convex, margins flat, spinulose-serrulate or entire, apex acute, acuminate, or convex, abaxial surface glaucous or not, pilose, villous, or long-silky to glabrescent, hairs appressed or spreading, wavy, adaxial slightly glossy, villous to glabrescent;

proximal blade margins entire or serrulate;

juvenile blade reddish or yellowish green, densely villous abaxially.

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

petiole convex to flat adaxially, 4–14 mm, velvety adaxially;

largest medial blade lorate, narrowly oblong, narrowly elliptic, or narrowly oblanceolate, 47–115 × 8–22 mm, 3.5–7.7 times as long as wide, base cuneate or convex, margins flat to slightly revolute, entire and gland-dotted, serrulate or crenate, apex acuminate, acute, or convex, abaxial surface glaucous, glabrous, sparsely tomentose, or short-silky, hairs wavy, adaxial slightly to highly glossy, glabrous or pilose;

proximal blade margins entire or serrulate;

juvenile blade yellowish green or reddish, glabrous or sparsely villous abaxially, hairs white.

abaxial nectary 0.3–0.9 mm, adaxial nectary narrowly oblong, oblong, or flask-shaped, 0.4–1.2 mm, nectaries distinct;

filaments densely hairy on proximal 1/2;

anthers 0.55–0.7–0.9 mm.

adaxial nectary narrowly oblong to oblong, 0.3–0.8 mm;

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

anthers yellow or purple turning yellow, ellipsoid or shortly cylindrical, 0.4–0.7 mm.

adaxial nectary ovate, oblong, or flask-shaped, 0.4–1.1 mm, longer than stipe, nectaries distinct or connate and cup-shaped;

stipe 0–0.7 mm;

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

ovules 13–22 per ovary;

styles 0–0.14–0.5 mm;

stigmas slenderly cylindrical or 2 plump lobes, 0.2–0.5 mm.

adaxial nectary narrowly oblong to oblong, 0.3–0.7 mm;

stipe 0.4–1 mm;

ovary pyriform, beak slightly bulged below styles;

ovules 9–12 per ovary;

styles 0.3–0.9 mm;

stigmas flat, abaxially non-papillate with rounded tip, 0.15–0.28–0.6 mm.

4–5 mm.

3.5–4 mm.

staminate 18–48 × 5–13 mm, flowering branchlet 3–15 mm; pistillate moderately densely flowered, slender or stout, 22–58 × 4–9 mm, flowering branchlet 4–12 mm;

floral bract (sometimes brown), 1.3–2.8 mm, apex rounded (sometimes truncate), entire or erose, abaxially hairy mainly proximally, hairs wavy.

flowering before or just before leaves emerge; staminate stout or subglobose, 15–34 × 8–22 mm, flowering branchlet 0(–2) mm; pistillate densely flowered, stout or slender, 14–43 × 7–12 mm, flowering branchlet 0–4 mm;

floral bract brown or black, 1.3–2.5 mm, apex rounded, abaxially hairy, hairs straight or wavy.

= 38.