Flora of North America species comparison

erect to ascending, (2–)10–30 dm, densely branched;

bark red to purplish red, glabrous;

infrastipular prickles paired or single, usually curved, sometimes erect, or declined, appressed, stout, 6–10 × 4–10 mm, base glabrous, internodal prickles or aciculi rare, smaller, sometimes absent.

climbing or vinelike, sometimes decumbent, 30–50 dm;

branches flexuous, brown;

infrastipular prickles usually paired, broad-based, internodal prickles paired or single, reddish brown, 4.5–9 × 6–9 mm.

5–8(–11) cm;

stipules 14–25 × 4–9 mm, auricles flared, 3–5 mm, margins undulate, irregularly glandular-serrate, surfaces glabrous, eglandular;

petiole and rachis sometimes with pricklets and aciculi, glabrous, puberulent, or sparsely pubescent, stipitate-glandular;

leaflets 5–7(–9), terminal: petiolule 6–14 mm, blade narrowly elliptic to ovate, 17–32 × 6–16 mm, membranous, base cuneate, margins 1–2-serrate, teeth 10–18(–23) per side, gland-tipped or eglandular, apex acute, sometimes obtuse, abaxial surfaces pale green, glabrous or pubescent, eglandular, adaxial deep green, turning purplish red in fall, lustrous, glabrous.

stipules 3–4 × 2.5–3.5 mm, auricles 3–6 × 1.5–2 mm, surfaces tomentose;

petiole and rachis with pricklets, glabrous or pubescent, usually stipitate-glandular;

leaflets: base cuneate, margins 1-serrulate-crenulate, teeth 12–16 per side, broad-based, apex obtuse to acute, often apiculate, gland-tipped, abaxial surfaces green with scattered pricklets and stipitate glands along prominent midveins, sometimes with hairs along midveins, eglandular, sometimes glabrous, adaxial glabrous, eglandular.

lateral and terminal.

corymbs, 1–6(–15)-flowered.

erect, slender to stout, 7–14(–25) mm, glabrous, sparsely to densely stipitate-glandular;

bracts 2, broadly lanceolate, 16–25 × 4–6 mm, margins entire, sometimes serrate, gland-tipped, surfaces glabrous with few hairs, eglandular.

bracts ovate-acuminate, (6–)8–10 × 5–7 mm, margins densely white sericeo-tomentose.

4.3–5.5 cm diam.;

hypanthium subglobose or depressed-globose, sometimes globose, 3.5–5.5 × 5.5–6.5 mm, glabrous, stipitate-glandular, neck absent;

sepals spreading or reflexed, lanceolate, 20–40 × 2.5–4 mm, tip 6–12 × 0.5–2 mm, margins usually pinnatifid, rarely entire, inner 2 usually entire, abaxial surfaces glabrous, densely stipitate- or setose-glandular;

petals single, pink to deep rose, rarely white, 22–26 × 25–30 mm;

stamens 140;

carpels 26–40(–65), styles exsert 1–2.5 mm beyond stylar orifice (1.5–3 mm diam.) of hypanthial disc (3–5 mm diam.).

5–7(–10) cm diam.;

hypanthium 5–7 × 8–9 mm;

sepal margins sparsely glandular-ciliate, tip 2–5 × 1–2 mm;

petals 20–35 × 20–30 mm;

carpels apically pilose, exsert 2–2.5 mm beyond stylar orifice of hypanthial disc (1–2 mm diam.).

orange-red to red or red-black, globose to depressed-globose, 8–12 × 9–13 mm, fleshy, glabrous, stipitate-glandular, neck absent;

sepals deciduous, erect.

leathery.

mostly basal, fewer basiparietal, 8–14, tan, 3–4 × 1.5–3.5 mm.

30–40+, tan, 4–5 × 2–3 mm.

= 28.

= 14.