Flora of North America species comparison

prostrate, short-trailing;

branches red-brown, gray-brown, or yellow-brown, glabrous;

branchlets yellow-green or yellow-brown, glabrous or puberulent.

erect, trailing, or decumbent;

branches flexible at base, usually not glaucous (usually slightly or highly glossy).

usually arctica-type (alba-type in S. athabascensis), scale margins connate.

stipules (sometimes marcescent) absent, rudimentary, or foliaceous on early ones, foliaceous on late ones;

petiole (shallowly to deeply grooved adaxially), 2–6.5 mm;

largest medial blade (marcescent), amphistomatous or hypostomatous, ovate, broadly obovate, oblanceolate, or elliptic, 4–23 × 3.5–10 mm, 1.7–3.6 times as long as wide, base convex or cuneate, margins flat, serrulate or crenulate, apex convex, acuminate, acute, or retuse, abaxial surface glaucous, usually glabrous (rarely few hairs), adaxial slightly or highly glossy, usually glabrous (rarely a few hairs);

proximal blade margins entire or serrate;

juvenile blade glabrous, pilose, or puberulent abaxially.

stipules usually absent or rudimentary, sometimes foliaceous;

petiole shallowly or deeply grooved, convex, or flat adaxially, often not glandular, sometimes with 1 or 2 pairs of spherical glands distally;

largest medial blade amphistomatous, hemiamphistomatous, or hypostomatous, (usually pinnately veined), narrowly to broadly elliptic, obovate, subcircular, circular, oblanceolate, narrowly oblong, oblong, or broadly obovate, 0.8–5.5 times as long as wide, angle of base and of apex usually less than or greater than 90o, (abaxial surface usually glaucous), surface hairs usually white, rarely ferruginous;

juvenile blade (usually yellowish green), hairs usually white, rarely ferruginous.

abaxial nectary absent, adaxial nectary narrowly oblong or oblong, 0.4–0.9 mm;

filaments distinct, glabrous;

stamens usually 1, rarely 2;

anthers ellipsoid or shortly cylindrical, 0.4–0.7 mm.

abaxial nectary present or absent;

stamens 2 (1 in S. uva-ursi);

filaments distinct or connate, glabrous or hairy;

anthers usually purple, or red turning yellow.

abaxial nectary absent, adaxial nectary narrowly oblong or oblong, 0.5–0.8 mm, shorter to longer than stipe;

stipe 0.3–1.6 mm;

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

ovules 4–9 per ovary;

styles 0.4–1 mm;

stigmas flat, abaxially non-papillate with rounded tip, or slenderly cylindrical, 0.1–0.23–0.4 mm.

abaxial nectary absent or present;

ovary usually not glaucous, hairy or glabrous, hairs flattened, ribbonlike, or cylindrical, beak abruptly or gradually tapering to styles or slightly bulged below styles;

ovules 4–23 per ovary;

styles usually connate;

stigmas flat, abaxially non-papillate with rounded tip, or stigmas slenderly or broadly cylindrical, or 2 plump lobes.

3–5 mm.

staminate 9–19 × 5–8 mm, flowering branchlet 0.5–9 mm; pistillate densely flowered, slender to subglobose, 11–47(–55 in fruit) × 6–10 mm, flowering branchlet 2–10 mm;

floral bract brown, black, tawny, light rose, or bicolor, 1.1–1.8 mm, apex rounded or acute, entire, abaxially sparsely hairy, hairs straight or wavy.

flowering as leaves emerge, usually from lateral buds (sometimes subterminal); staminate on flowering branchlet or sessile; pistillate on flowering branchlet, usually stout, globose, or subglobose, sometimes slender;

floral bract brown, tawny, or bicolor, apex usually entire, sometimes toothed; pistillate bract usually persistent after flowering.

= 38.