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.

erect, flexuous, spreading, ascending, sprawling, or procumbent, 1–50 dm;

distal and fertile branches glabrous, rarely puberulent to tomentose, eglandular;

prickles infrastipular, single or paired (rarely to 3 in R. californica, to 4 in R. gymnocarpa), erect, curved, hooked, declined, introrse, appressed, thin, terete, deltate, subulate, stout, sparse, internodal similar, smaller, sometimes mixed with aciculi, rarely 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, (2–)4–11(–17) cm, leathery to membranous;

stipules persistent, adnate to petiole, auricles usually flared or erect, margins entire or serrate, sometimes serrulate, undulate, or sinuate, usually glandular;

leaflets (3–)5–9(–11), terminal: petiolule 1–15(–20) mm, blade elliptic, lanceolate, obovate, or ovate, sometimes cordate, ovoid, oblong, or orbiculate, (4–)10–40(–63) × (3–)5–40 mm, rugose in R. rugosa, abaxial surfaces sometimes glaucous, glabrous or pubescent, eglandular, sessile-, or stipitate-glandular, adaxial dull or lustrous, glabrous, rarely pubescent, eglandular.

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

corymbs, panicles, sometimes solitary, 1–30(–50)-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.

erect or recurved, sometimes curved or reflexed as hips mature, slender or stout, 2–20(–35) mm, glabrous or pubescent, eglandular or usually stipitate-, rarely sessile- or setose-glandular;

bracts persistent, 1–3, margins entire or serrate, sometimes undulate.

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.).

1–9 cm diam.;

hypanthium globose to depressed-globose, ovoid, or ovoid-urceolate, sometimes cupulate, oblong, or hemispheric, glabrous or sparsely hairy, eglandular, stipitate-, or setose-glandular;

sepals persistent or deciduous, erect, spreading, or reflexed, rarely ascending, lanceolate or ovate-lanceolate, 5–30(–40) × 1.5–6 mm, margins entire or pinnatifid, abaxial surfaces glabrous, rarely pubescent, sessile-, stipitate-, or setose-glandular, sometimes eglandular;

petals single or double, pink to rose or purplish pink, rarely white or crimson;

carpels (3–)20–40(–65), styles free exsert (0.5–)1–2.5(–4) mm, pilose, stylar orifice 1–3 mm diam., hypanthial disc flat, 2–5(–10) 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.

scarlet or red to orange-red, rarely purplish, brownish, or crimson or blue-purple, globose to depressed-globose, ovoid, obovoid, or ellipsoid, rarely pyriform, urceolate, elongate, or oblong, 6–18(–24) × 5–15(–25) mm, glabrous, sometime setose, eglandular or stipitate-, rarely setose-, glandular;

sepals persistent or deciduous, erect, reflexed, or spreading.

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

basal or basiparietal.

= 14, 28.