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 foliaceous, (prominent, 5–9–15 mm), apex rounded to acute, sometimes acuminate;

petiole (usually reddish), shallowly grooved, or convex to flat adaxially, 6–20 mm, short-silky or velvety adaxially;

largest medial blade broadly to narrowly elliptic, or ovate to broadly obovate, (25–)30–86(–118) × 12–51 mm, 1.4–3 times as long as wide, base convex, rounded, cuneate, subcordate, cordate, or sometimes irregularly lobed, margins flat, serrulate or crenate, apex acute, acuminate, or convex, abaxial surface glaucous, glabrous, pubescent, or pilose, hairs wavy, adaxial slightly glossy or dull, glabrous, puberulent, pubescent, or pilose, midrib hairy;

proximal blade margins entire or serrulate;

juvenile blade reddish, glabrous or pubescent abaxially, hairs white, sometimes also ferruginous.

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.

adaxial nectary oblong, 0.3–1 mm;

filaments distinct or connate less than 1/2 their lengths, glabrous;

anthers purple turning yellow, 0.4–0.5 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 oblong, flask-shaped, 0.3–0.8 mm, shorter than stipe;

stipe 0.5–0.8–3 mm;

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

ovules 18 per ovary;

styles (0.5–)0.7–1.8 mm;

stigmas flat, abaxially non-papillate with rounded tip, or 2 plump lobes, 0.1–0.21–0.29 mm.

5–7 mm.

4–7 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.

flowering before leaves emerge; staminate stout, 16–39 × 10–12 mm, flowering branchlet 0 mm; pistillate densely or moderately densely flowered, slender to globose, 17–73 × 8–20 mm, flowering branchlet 0–5 mm;

floral bract brown or black, 1–2.4 mm, apex rounded or acute, abaxially hairy, hairs straight.

= 76.

= 38.