Flora of North America species comparison

, branches, and twigs densely covered with conspicuous lenticels, glabrescent; short shoots absent.

, branches, and twigs with few lenticels, glabrous; short shoots absent or inconspicuous and few.

stipules to 1 mm, not spiny, caducous, hard, triangular-subulate, glabrous;

petiole 0.4–1.5(–2) cm, shorter than rachis, subglabrous;

pinnae 2(or 4), rachis 8–13 mm;

leaflets 2 per pinna, blades obovate to oblanceolate-elliptic, 3–8.5(–9) × 1.5–5(–7) cm, base oblique, margins entire, usually revolute, apex rounded with a very small mucro, brochidodromous venation conspicuous on both surfaces, main vein subcentral, surfaces glabrous.

stipules to 10(–15) mm, spiny (at least on some branches);

petiole to 1–2.5 cm, longer than rachis, glabrous;

pinnae 2, rachis 5–10(–16) mm;

leaflets 2 per pinna, blades asymmetric-oblong or obovate- to ovate-elliptic, 1.7–2.4(–4.5) × 1.3–2.5(–3.5) cm, base oblique, margins entire, flat, apex rounded, obtuse, or rarely slightly emarginate, brochidodromous venation more conspicuous abaxially, main vein submarginal, surfaces glabrous, abaxially rarely glabrescent.

primary peduncle flattened, axis to 7 cm, glabrescent, secondary peduncles (2.5–)4.5–6 cm, glabrous;

bract absent.

primary peduncle not flattened, axis to 8 cm, subglabrous, secondary peduncles 1.8–3 cm, usually glabrous;

glandular bract present at base, inconspicuous.

calyx campanulate or tubular, 1.5–2 mm, lobes 0.5 mm, glabrescent;

corolla campanulate or funnelform, to 5.5 mm, lobes 4 or 5;

stamens white, dirty cream, or pink, tube to 3–3.5 mm;

ovary 1–1.5 mm, glabrous, stipe to 1.5 mm.

calyx campanulate, 1–1.2 mm, lobes 0.5 mm, pubescent;

corolla campanulate, 5 mm, lobes 5 or 6, pubescent;

stamens white or dirty cream, tube to 5.5 mm;

ovary 2.5 mm, glabrous, stipe 2.5 mm.

slightly recurved to 1-coiled (especially at dehiscence), slightly constricted between seeds, 8–20 × 1–1.5 cm, margin not evident, base attenuate, apex cuspidate without beak, glabrous, veins faint;

without stipe.

reddish or maroon, recurved to coiled several times (especially at dehiscence), constricted between seeds, 5–10(–15) × 1–1.5 cm, base attenuate, margin thickened, apex acute, glabrous, veins irregular, reticulate;

stipe 0–5 mm.

on secondary peduncles 15–30-flowered, sometimes elongated.

8–25(–35)-flowered, sometimes elongated.

6–12, usually not pendulous, 6–9 × 5–6 mm;

aril red, covering proximal 1/3 of seed.

5–8, 6–7 × 5–8 mm;

aril white, covering proximal 1/3 of seed; exposed seeds pendulous.

triangular, 0.8 mm, puberulous abaxially.

triangular, to 1.2 mm, puberulous abaxially.

= 26.

= 26.