Flora of North America species comparison

ascending to erect, (2–)4–20(–25) dm, openly branched;

bark ± glaucous when young, dark reddish brown or dull red with age outer layer may exfoliate as thin ash gray peel, glabrous;

infrastipular prickles usually paired, erect, rarely curved, usually subulate, 2–10 × 2–4 mm, base glabrous, internodal prickles rare or absent.

procumbent or climbing, 10+ dm, rooting at nodes;

bark of canes green or brown;

prickles infrastipular and/or internodal, single or paired, curved or declined, ± stout, 4–5 × 2 mm, aciculi absent.

5–10(–13) cm;

stipules 8–22 × 2–5 mm, auricles flared, 2–5 mm, margins usually entire, sometimes erose or lobed, finely ciliolate to ciliate, eglandular, surfaces glabrous or sparsely pubescent, sparsely stipitate-glandular or eglandular;

petiole and rachis sometimes with pricklets, glabrous or hairy hairs to 1 mm, sometimes stipitate-glandular;

leaflets 5–7(–9), terminal: petiolule 8–12 mm, blade elliptic-ovate, (15–)20–45(–60) × 9–16(–20) mm, widest at or below middle, membranous, base cuneate to obtuse, margins 1(–2)-serrate, teeth 12–22 per side, on distal 3/4–4/5 of margin, acute, eglandular, apex acute, sometimes obtuse, abaxial surfaces pale green, usually sparsely pubescent, eglandular, adaxial green, dull, glabrous, rarely puberulent.

deciduous (north) or semipersistent (south), 8–10 cm;

stipules narrowly lanceolate, 10–12 × 2–3 mm, auricles erect, sometimes flared, 2–4 mm, margins fimbriate, stipitate-glandular, surfaces glabrous, eglandular;

petiole and rachis with pricklets, glabrous, stipitate- or, sometimes, sessile-glandular;

leaflets 7–9, terminal: petiolule 5–9 mm, blade broadly ovate to obovate, 15–30 × 12–20 mm, leathery, base cuneate, margins 1(–2)-serrate, teeth 12–16 per side, acute, gland-tipped, apex acute to acuminate, abaxial surfaces glabrous, eglandular except for glands on midveins, adaxial green, lustrous, glabrous.

(1–)5–20+-flowered.

corymbs, sometimes panicles or solitary flowers, 1–12-flowered.

erect, sometimes recurved, slender, 10–22 mm, usually glabrous, sometimes finely puberulent, eglandular, rarely stipulate-glandular;

bracts 2–3, lanceolate, 8–14 × 3–6 mm, margins entire, sometimes serrate, irregularly stipitate-glandular and/or erose, surfaces glabrous or pubescent, eglandular.

18–25 mm, glabrous, eglandular;

bracts 1–3, lanceolate, 9–16 × 2.5–5 mm, margins sparsely stipitate-glandular, surfaces glabrous, eglandular.

2.4–3.8 cm diam.;

hypanthium ovoid-urceolate, 3–5 × 2.5–3.5 mm, glabrous, rarely setose, eglandular, neck (0–)0.5–1 × 2 mm;

sepals spreading, ovate-lanceolate, 10–17 × 1.5–3 mm, tip 3–7(–10) × 1.5–2.5 mm, margins entire, abaxial surfaces sometimes puberulent, densely or sparsely stipitate-glandular, rarely eglandular;

petals single, pink to deep pink, 12–18 × 10–18 mm;

stamens 75;

carpels 22–35, styles exsert 1–2 mm beyond stylar orifice (1 mm diam.) of hypanthial disc (3.5 mm diam.).

scent of apple or clover, 2–2.5 cm diam.;

hypanthium urceolate, 4–6.5 × 2–3 mm, eglandular, neck (0–)1 × 4–5 mm;

sepals ovate-acuminate, 6–8 × 1–1.5 mm, margins pinnatifid, tip 2 × 0.5 mm, abaxial surfaces glabrous, eglandular;

petals double, sometimes single, white, pink to rose distally, 13–15 × 11–15 mm;

carpels 12–21, styles pilose, exsert 3.5–5 mm beyond stylar orifice (1.5–2 mm diam.), hypanthial disc appearing flattened with age, 3–4 mm diam.

scarlet, globose, sometimes subglobose or ovoid, 7–15 × 7–13 mm, fleshy, glabrous, eglandular, rarely setose- or stipitate-glandular, neck (0–)1–1.5 × 1.5–3.5 mm;

sepals persistent, erect.

red, globose, 5–10 × 5–9 mm, eglandular.

basiparietal, 5–35, tan, 3–4 × 1.5–2.5 mm.

1–11, dark tan, 4–4.5 × 2–2.5 mm.

= 14, 28.

= 14(28).