Rosa rubiginosa |
Rosaceae tribe Roseae |
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Eglantine or sweet briar rose, Eglantine rose, rosier églantier, small-flower sweetbrier, sweet-briar rose, sweet-brier, sweetbrier rose |
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Habit | Shrubs, erect; not rhizomatous. | Shrubs or subshrubs; usually armed, rarely unarmed. | ||||
Stems | 10–30 dm; distal branches arching, bark dark brownish red; infrastipular prickles single or paired, curved, falcate, 6–12 × 3–7 mm, lengths varying or ± uniform, internodal prickles sometimes mixed with aciculi and glandular setae. |
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Leaves | persistent, 4–6.5 cm; stipules 6–10 × 2–4 mm, auricles 3–5 mm, margins stipitate-glandular, surfaces glabrous, eglandular; petiole and rachis with pricklets, puberulent, stipitate-glandular; leaflets 5–7(–9), viscid glands with ripe apple scent, terminal: petiolule 5–10 mm, blade mostly suborbiculate or broadly oval, 10–25 × 8–15 mm, base obtuse, margins 2- or multi-serrate, teeth 10–18 per side, apex acute to obtuse, abaxial surfaces glabrous or pubescent, usually densely viscid-glandular, adaxial green, lustrous to dull, puberulent or glabrous. |
alternate, imparipinnately compound or 3-foliate [simple]; stipules persistent, sometimes caducous [absent], adnate to petiole base or free, auricles free; venation pinnate. |
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Inflorescences | panicles, 1–3(–7)-flowered. |
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Pedicels | erect, 6–9 mm, densely stipitate-glandular, sometimes mixed with aciculi [and setae]; bracts 2, ovate-lanceolate to lanceolate, 15 × 5 mm, margins stipitate-glandular, surfaces glabrous, eglandular. |
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Flowers | 2–4 cm diam.; hypanthium obovoid or broadly oblong, 5–6 × 3–4 mm, eglandular, neck (0–)1–1.5 × 3–4 mm; sepals erect or spreading, rarely reflexed, lanceolate or ovate-lanceolate, 14–18 × 2 mm, margins mostly pinnatifid, tip 3–5 × 0.5–1 mm, abaxially densely stipitate-glandular; petals bright or deep pink, 11–20 × 11–18 mm; carpels 25–45, styles villous or glabrous, exsert 1–2 mm beyond stylar orifice (1.2–2 mm diam.) of hypanthial disc (2.5–4 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. |
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Fruits | accessory; aggregated achenes enclosed within hypanthium (hip); styles persistent, not elongate. |
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Hips | dark red, subglobose to broadly ovoid, ellipsoid, or pyriform, 10–25 × 7–22 mm, glabrous, sometimes setose, eglandular; sepals tardily deciduous, mostly erect. |
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Achenes | 15–25, tan, 3.5–4(–5) × 2–2.5(–3) mm. |
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2n | = 35, 42. |
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Rosa rubiginosa |
Rosaceae tribe Roseae |
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Distribution |
AL; AR; CA; CO; CT; DC; DE; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; NE; NH; NJ; NY; OH; OK; OR; PA; RI; SC; TN; TX; UT; VA; VT; WA; WI; WV; WY; BC; NB; NF; NS; ON; PE; QC; Europe; w Asia; n Africa [Introduced widely worldwide]
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North America; Mexico; Eurasia; Africa; Pacific Islands; Australia [Introduced widely worldwide] |
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Discussion | Varieties 2 (2 in the flora). Rosa rubiginosa has been introduced throughout Canada and the United States except the desert southwest. Plants are compact, upright shrubs without rhizomes. Stems have stout, falcate infrastipular prickles mixed with internodal prickles, aciculi, and glandular setae. Leaflet blades are densely viscid-glandular with ripe apple scent and margins 2- or multi-serrate with stipitate glands. Rosa eglanteria Linnaeus is a formally rejected name that pertains here. (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.) |
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Key |
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Source | FNA vol. 9, p. 90. | FNA vol. 9, p. 74. | ||||
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Roseae > Rosa > subg. Rosa > sect. Caninae | Rosaceae > subfam. Rosoideae | ||||
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Name authority | Linnaeus: Mant. Pl. 2: 564. (1771) | Lamarck & de Candolle: Syn. Pl. Fl. Gall., 331. (1806) | ||||
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