Flora of North America species comparison

stipules foliaceous, apex convex to rounded;

petiole shallowly to deeply grooved adaxially, 5–13 mm, with clusters of spherical or foliaceous glands distally, glabrous, pilose, or densely villous adaxially;

largest medial blade usually hypostomatous or hemiamphistomatous, rarely amphistomatous, lorate, very narrowly elliptic, narrowly elliptic, or lanceolate, (24–)55–133 × 11–43 mm, 2.5–6.2 times as long as wide, base convex or cuneate, margins flat, serrulate, apex acuminate to caudate, abaxial surface usually not glaucous (rarely so), glabrous, pilose, or moderately densely villous or long-silky, hairs appressed or spreading, white and/or ferruginous, straight or wavy, (coarse, caducous), adaxial (secondary veins flat or protruding), slightly or highly glossy, glabrous, pilose, or long-silky, hairs white and/or ferruginous;

proximal blade margins entire and glandular-dotted, or serrulate or crenulate;

juvenile blade reddish or yellowish green, glabrous or densely villous or long-silky abaxially, hairs white and ferruginous.

stipules absent or rudimentary;

petiole (sometimes deeply grooved adaxially) 0.2–1.5 mm, long- to short-silky adaxially;

largest medial blade linear, lorate, or narrowly oblanceolate, 13–42 × 1.1–4.4 mm, 5.8–24.6 times as long as wide, base cuneate, margins flat, usually entire, rarely remotely spinulose-serrulate, apex acute to acuminate (apiculate), abaxial surface glaucous or not (sometimes obscured by hairs), densely long-silky, or villous to glabrescent, hairs appressed, straight, adaxial slightly glossy or dull, moderately densely long- or short-silky to glabrescent;

proximal blade margins entire;

juvenile blade yellowish green (color obscured by hairs), very densely long-silky abaxially.

abaxial nectary 0.5–1.1 mm, adaxial nectary square or ovate, 0.3–0.9 mm, nectaries connate and cup-shaped;

stamens 3–6;

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

anthers ellipsoid, shortly cylindrical, obovoid, or globose, 0.6–0.8 mm.

abaxial nectary 0.1–0.6 mm, adaxial nectary oblong or narrowly oblong, 0.5–1.1 mm, nectaries distinct;

filaments hairy on proximal 1/2 or basally;

anthers 0.4–0.7 mm.

adaxial nectary square or ovate, (swollen), 0.2–0.5 mm, shorter than stipe;

stipe 0.5–2 mm;

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

ovules 18–24 per ovary;

styles connate or distinct 1/2 their lengths, 0.5–0.8 mm;

stigmas flat, abaxially non-papillate with rounded tip, broadly cylindrical, or 2 plump lobes, 0.24–0.31–0.42 mm.

adaxial nectary square, narrowly oblong, ovate, or oblong, 0.4–1.4 mm, longer than stipe;

stipe 0–0.3 mm;

ovary pyriform, long-silky or pilose, beak gradually tapering to or bulged below styles;

ovules 16–26 per ovary;

styles 0–0.3 mm;

stigmas slenderly cylindrical, 0.4–0.6 mm.

5–7 mm.

3–6 mm.

staminate 19–69 × 4–14 mm, flowering branchlet 5–23 mm; pistillate (fruiting in summer), moderately densely to loosely flowered, slender to stout, 23–56(–70 in fruit) × 8–12 mm, flowering branchlet 8–25 mm;

floral bract 1.5–3 mm, apex convex or rounded, entire or toothed, abaxially sparsely hairy throughout or proximally, hairs wavy.

staminate 6.5–18 × 4–7 mm, flowering branchlet 1–38(–75) mm; pistillate moderately densely or loosely flowered, slender or stout, 6–16 × 4–7 mm, flowering branchlet 8–13(–120) mm;

floral bract 1.3–2.8 mm, apex acute or convex, toothed or entire (glandular-dotted), abaxially hairy throughout or proximally, hairs straight.

= 76.