Flora of North America species comparison

compound thorns on trunks present;

twigs: new growth reddish brown, 1-year old dull purple-brown, 2-years old dull gray, older paler;

thorns on twigs straight to slightly recurved, 2-years old deep purple to shiny black, usually ± fine, 3–5 cm.

expanding bud-scales bright rufous-red;

twigs: new growth color not recorded, appressed-pubescent, 1-year old mid brown, 2-years old dark red-brown, older gray or dark gray;

thorns on twigs usually numerous, straight to slightly curved, 1-year old dark blackish brown, ± stout, 3.5–5.5 cm.

petiole length 50–66% blade, sparsely glandular;

blade trullate to ovate, ovate-oblong, or broadly rhombic, rarely ± deltate, 2–6(–7) cm, subcoriaceous, base broadly cuneate to subtruncate to weakly subcordate, lobes (1–)3 or 4 per side, sinuses shallow to deeper, lobe apex acute, sometimes ± obtuse, margins serrate, veins 5 or 6 per side (except smaller leaves), apex acute, surfaces glabrous (except var. virella).

petiole length 30–35% blade, densely pubescent in adaxial sulcus, ± sessile-glandular;

blade ± ovate to ovate-trullate, 4–7 cm, ± thin, base cuneate to broadly cuneate, lobes (4 or)5 or 6 per side, sinuses moderately deep, max LII 25–33%, lobe apex acute to acuminate, margins with regular, acute teeth, often subacute mature, veins (5 or)6 or 7 per side, apex acute to acuminate, abaxial surface glabrous except for sparse hairs along midvein proximally, adaxial ± densely scabrous-pubescent young (variably persistent to maturity).

5–10-flowered;

branches glabrous, sometimes sparsely villous;

bracteoles caducous, usually few, margins short-stipitate-glandular.

(6–)8–12-flowered;

branches ± tomentose;

bracteoles abundant, deep orange-red or fading, narrow, margins densely sessile-glandular.

15–25 mm diam.;

sepals narrowly triangular, 5–6 mm, margins usually entire or subentire, rarely glandular-serrate, abaxially glabrous;

stamens (10 or)20, anthers pale pink to bright rose or dull purple, sometimes cream, 0.6–0.8 mm;

styles 3–5.

12–15 mm diam.;

hypanthium ± tomentose or densely pubescent;

sepals greenish or pale green, triangular, 3–5 mm, margins glandular-denticulate, apex ± red or paler red, abaxially glabrous, adaxially pubescent;

stamens 10, anthers ivory or cream;

styles 3 or 4.

greenish with pink or mauve areas, sometimes bright crimson or scarlet, often rather angular, 10–20 mm diam., highly pruinose, not punctate;

flesh hard;

sepals on collar, spreading;

pyrenes 3–5.

3–10 in ± compact infructescences, red young, bright red or orange-scarlet in shade mature, ± ellipsoid to suborbicular, 9–13 mm tall, densely to sometimes sparsely pubescent;

sepals appressed, 3–5 mm;

pyrenes 3 or 4(or 5), sides ± deeply concave.