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climbing prairie rose, climbing rose, prairie rose

Habit Shrubs or subshrubs; usually armed, rarely unarmed.
Stems

erect to procumbent and vinelike, 10–20(–60) dm;

bark of canes green to light brown;

prickles infrastipular and internodal, single or paired, declined, usually curved, sometimes erect, stout, 3–4 × 7–9 mm, broad-based, sometimes mixed with aciculi, rarely absent.

Leaves

deciduous, 8–12 cm;

stipules narrowly lanceolate, 12–15 × 0.5–3 mm, auricles flared, 3–4 mm, margins entire, sometimes fimbriate, stipitate-glandular, surfaces glabrous, sparsely glandular;

petiole and rachis with or without pricklets, usually pubescent, stipitate-glandular;

leaflets 3 (mostly younger stems)–5 (older stems), terminal: petiolule 10–16 mm, blade ovate to elliptic-ovate, (30–)48(–70) × (20–)27(–40) mm, membranous or leathery, base rounded or obtuse, margins 1(–2)-serrate, teeth (18–)35(–42) per side, coarse, gland-tipped, apex usually acuminate, abaxial surfaces pale green, glabrous or pubescent to tomentose, sometimes sessile- and/or stipitate-glandular, adaxial darker green, dull, glabrous.

alternate, imparipinnately compound or 3-foliate [simple];

stipules persistent, sometimes caducous [absent], adnate to petiole base or free, auricles free;

venation pinnate.

Panicles

(1–)6(–15+)-flowered.

Pedicels

15–25 mm, glabrous, stipitate-glandular;

bracts 1 or 2, narrowly lanceolate, 10–30 × 1–2 mm, margins short stipitate-glandular, surfaces glabrous, eglandular.

Flowers

functionally unisexual or monoecious, plants dioecious, 3–5 cm diam.;

hypanthium ovoid, 4–6 × 4–5 mm, stipitate-glandular;

sepals narrowly to broadly ovate-lanceolate, 10–18 × 2–4 mm, margins entire, tip 3–4 × 0.5–1 mm, abaxial surfaces pubescent, stipitate-glandular;

petals single, rose-purple to pink, fading to white, 18–25 × 16–25 mm;

stamens 212;

carpels 20–25, styles glabrous, exsert 5–6 mm beyond stylar orifice rims (0.5 mm diam.), hypanthial disc 2–3 mm diam.

perianth and androecium perigynous;

epicalyx bractlets absent;

hypanthium ovoid, oblong, globose to cupulate or urceolate, rarely obovoid or hemispheric, with or without distinct necks;

torus usually absent, conic if present;

carpels 3–110+, styles terminal, distinct, rarely connate;

ovule 1, apical.

Fruits

accessory; aggregated achenes enclosed within hypanthium (hip);

styles persistent, not elongate.

Hips

bright red, subglobose to globose, 6–10 × 6–9 mm, firm, sparsely stipitate-glandular often undeveloped because of dioecy, then early deciduous.

Achenes

17–22, fawn, 4–5 × 2.5–3 mm.

2n

= 14.

Rosa setigera

Rosaceae tribe Roseae

Phenology Flowering May–Aug.
Habitat Prairies, savannas, woodland borders, clearings, open fields, abandoned pastures, waste areas, roadsides, fence rows
Elevation 100–500 m (300–1600 ft)
Distribution
from FNA
AL; AR; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MO; MS; NC; NE; NH; NJ; NY; OH; OK; PA; SC; TN; TX; VA; VT; WI; WV; ON [Introduced in Europe (Channel Islands)]
[WildflowerSearch map]
[BONAP county map]
North America; Mexico; Eurasia; Africa; Pacific Islands; Australia [Introduced widely worldwide]
Discussion

In the eastern United States Rosa setigera has been introduced from the Midwest or escaped from cultivation (W. H. Lewis 1959b). Based primarily on herbarium records, R. setigera is introduced in Connecticut, Delaware, District of Columbia, Florida, Louisiana, Maine, Maryland, Massachusetts, Mississippi, New Hampshire, New Jersey, North Carolina, South Carolina, Vermont, and Virginia; other states (Alabama, Georgia, New York, Pennsylvania, West Virginia) probably have both native and introduced populations.

Rosa setigera is the only native rose with procumbent or climbing stems to 60 dm with three leaflets on younger stems and five on older stems, and with unisexual flowers and caducous sepals.

Rosa setigera is the only species of sect. Systylae native to North America. The species is distinct from other members of the section in its flavonoid patterns, which show linkages to sect. Cinnamomeae [= sect. Rosa] (C. Grossi et al. 1998); it is also the only dioecious species of the genus. Microscopic floral characters are detailed elsewhere (W. H. Lewis 1959b; P. G. Kevan et al. 1990; J. R. Kemp et al. 1993, 1993b).

Since 1886, Rosa setigera has been used also as one parent in climbing hybrid cultivars produced in central Europe to increase hardiness and vigorous growth.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Genus 1, species ca. 140 (33 in the flora).

The base chromosome number for Roseae is x = 7.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 9, p. 83. FNA vol. 9, p. 74.
Parent taxa Rosaceae > subfam. Rosoideae > tribe Roseae > Rosa > subg. Rosa > sect. Systylae Rosaceae > subfam. Rosoideae
Sibling taxa
R. acicularis, R. arkansana, R. blanda, R. bracteata, R. bridgesii, R. californica, R. canina, R. carolina, R. cinnamomea, R. foliolosa, R. gallica, R. glauca, R. gymnocarpa, R. laevigata, R. lucieae, R. minutifolia, R. mollis, R. multiflora, R. nitida, R. nutkana, R. palustris, R. pinetorum, R. pisocarpa, R. rubiginosa, R. rugosa, R. sherardii, R. spinosissima, R. spithamea, R. stellata, R. tomentosa, R. virginiana, R. woodsii
Subordinate taxa
Synonyms R. rubifolia, R. setigera var. elatior, R. setigera var. glabra, R. setigera var. tomentosa
Name authority Michaux: Fl. Bor.-Amer. 1: 295. (1803) Lamarck & de Candolle: Syn. Pl. Fl. Gall., 331. (1806)
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