Flora of North America species comparison

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 broad rudiments or foliaceous on early ones, foliaceous on late ones, (glands numerous adaxially), apex rounded to convex;

petiole (sometimes with spherical glands distally), 4–10 mm, pilose adaxially;

largest medial blade (sometimes amphistomatous), narrowly elliptic, very broadly oblong, lorate, or linear, 67–130 × 9.5–16 mm, 4.7–12.4 times as long as wide, base cuneate to convex, margins serrulate to serrate, apex acuminate, caudate, or acute, abaxial surface (usually not glaucous, rarely thinly so), glabrous or puberulent, hairs wavy, adaxial slightly glossy, pilose to glabrescent;

proximal blade margins entire or shallowly serrulate;

juvenile blade sparsely velvety to pilose 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.

abaxial nectary (0.2–)0.3–0.6 mm, adaxial nectary square to ovate, 0.2–0.6 mm, nectaries distinct;

stamens 4–6(–8);

filaments (sometimes basally connate), hairy on proximal 1/2;

anthers 0.4–0.5 mm, (axes straight).

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 square (flattened), 0.2–0.6 mm;

stipe 1.2–3.2 mm;

ovary pyriform, (sometimes villous), beak slightly bulged or abruptly tapering to styles;

ovules 12–18 per ovary;

styles 0.1–0.3 mm;

stigmas 0.2–0.29–0.32 mm.

4–5 mm.

6–7 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.

staminate 19–80 × 6–10 mm, flowering branchlet 2–23 mm; pistillate 23–82 × 6–15 mm, flowering branchlet 2–48 mm;

floral bract 1.4–2.4 mm, apex acute or rounded, entire or toothed, abaxially sparsely to moderately densely hairy, hairs wavy; pistillate bract deciduous after flowering.

= 38.