Flora of North America species comparison

stipules rudimentary or foliaceous on early ones, usually foliaceous on late ones, (glands few or absent adaxially), apex acuminate, acute, or rounded;

petiole (margins covering groove, with spherical glands distally), (2–)3–10(–15) mm, glabrous or pilose adaxially;

largest medial blade (sometimes amphistomatous), very narrowly elliptic, lanceolate to narrowly lanceolate, or linear to lorate, (50–)70–103(–190) × (6–)7.5–17(–23) mm, 6–13 times as long as wide, base cuneate to convex, margins serrulate, apex acuminate, acute, or caudate, abaxial surface (not glaucous), glabrous or pilose, hairs white or ferruginous, wavy, adaxial slightly glossy, glabrous or pilose (especially on midribs);

proximal blade margins serrulate;

juvenile blade glabrous or pilose abaxially, hairs white and/or ferruginous.

stipules foliaceous, apex acute, acuminate, or rounded;

petiole convex to flat, or shallowly grooved adaxially, 3–17 mm, pilose, villous, or pubescent adaxially;

largest medial blade (often amphistomatous), lorate, narrowly oblong, or narrowly to broadly elliptic, 26–102 × 8–30 mm, 2.5–3–5.2 times as long as wide, base convex, rounded, or subcordate, margins flat or slightly revolute, (thickened), entire or serrulate, apex acute or acuminate, abaxial surface not glaucous, glabrous, pilose, or moderately densely short-silky, hairs (white, sometimes also ferruginous), wavy, adaxial dull or slightly glossy, glabrous or moderately densely pilose;

proximal blade margins entire, crenate, or serrulate;

juvenile blade green, pilose to densely villous abaxially, hairs white, sometimes also ferruginous.

abaxial nectary 0.3–1 mm, adaxial nectary oblong to ovate, 0.2–0.6 mm, nectaries distinct or connate and shallowly cup-shaped;

stamens 4–6;

filaments hairy on proximal 1/2 or basally;

anthers 0.4–0.6 mm, (axes strongly recurved).

adaxial nectary narrowly oblong, oblong, ovate, or flask-shaped, 0.6–1.5 mm;

filaments distinct or connate ca. 1/2 their lengths, glabrous, hairy on proximal 1/2;

anthers yellow or purple turning yellow, 0.5–0.8 mm.

adaxial nectary oblong, (swollen), 0.2–0.5 mm;

stipe 0.5–1.5 mm;

ovary pyriform to obclavate, (rarely pilose), beak slightly bulged below styles;

ovules 12–16 per ovary;

styles 0.1–0.3 mm;

stigmas (sometimes 2 plump lobes), 0.2–0.28–0.36 mm.

adaxial nectary oblong, ovate, or flask-shaped, 0.3–0.8 mm, shorter than stipe;

stipe 0.5–2.5 mm;

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

ovules 10–18 per ovary;

styles 0.3–1.4 mm;

stigmas flat, abaxially non-papillate with rounded tip, or slenderly cylindrical, or 2 plump lobes, 0.2–0.26–0.48 mm.

3–5 mm.

2.5–6 mm.

staminate 35–83 × 7–13 mm, flowering branchlet 5–35 mm; pistillate 23–74(–80 in fruit) × 5–10 mm, flowering branchlet 6–35 mm;

floral bract 1–3 mm, apex acute or rounded, entire, abaxially sparsely hairy, hairs wavy; pistillate bract deciduous after flowering.

flowering as or just before leaves emerge; staminate stout or subglobose, 7–37 × 5–12 mm, flowering branchlet 0.5–5.6 mm; pistillate densely or moderately densely flowered, stout, 12–62 × 7–17 mm, flowering branchlet 1–9 mm;

floral bract brown, 0.7–2.1 mm, apex rounded or retuse, abaxially hairy throughout or proximally, hairs straight, wavy, or curly.

= 38.

= 76.