Rosa tomentosa

Smith

Fl. Brit. 2: 539. 1800.

Common names: Harsh downy-rose
Introduced
Treatment appears in FNA Volume 9. Treatment on page 92. Mentioned on page 90.

Shrubs, climbing; rhizomatous or not. Stems arching, 7–20 (–30) dm, internodes long; distal branches spreading, bark pale green; infrastipular prickles single or paired, curved or ± erect, 3–6 × 2.5–3.5 mm, lengths ± uniform, internodal prickles sometimes mostly smaller, with aciculi, rarely absent. Leaves deciduous, 5–7.5 (–11) cm; stipules 10–16 (–20) × 3–4 mm, auricles 2–5 mm, margins densely glandular-ciliate, surfaces tomentose, often glandular abaxially; petiole and rachis with sparse pricklets, tomentulose, glandular; leaflets 5–7, terminal: petiolule 6–8 mm, blade orbiculate to ovatelanceolate or elliptic, 15–30 (–60) × 8–22 (–50) mm, base obtuse, margins 1-serrate or multi-serrate, teeth 13–20 per side, apex acute, abaxial surfaces tomentose, usually resinous-glandular, glands resin-scented, adaxial pale or grayish green, dull, glabrous or pubescent. Inflorescences panicles, 1–6-flowered. Pedicels erect, (11–) 20–35 mm, densely stipitate-glandular; bracts 2, ovatelanceolate, 13–14 × 5–7 mm, margins ciliate-glandular, surfaces tomentose, glandular or eglandular. Flowers 3.5–5 cm diam.; hypanthium ovoid, 6–7 × 4 mm, stipitate-glandular, setose, rarely eglandular, neck 1.5 × 2 mm; sepals spreading or erect, ovatelanceolate, 15–25 × 2–3 mm, margins pinnatifid, tip 4–5 × 1–1.5 mm, abaxially densely stipitate-glandular; petals pink, rarely white, 8–15 × 10–15 mm; carpels 26–34, styles glabrous or villous, exsert 2–2.5 mm beyond stylar orifice (1 mm diam.) of hypanthial disc (2–4 mm diam.). Hips dark red, oblong, ovoid, or globose, 10–15 × 10–12 mm, glabrous, stipitate-glandular at least proximally, neck 1 × 5–6 mm; sepals deciduous after anthesis, spreading or reflexed. Achenes ca. 23, tan, 4–4.5 × 2 mm. 2n = 35.


Phenology: Flowering Jun–Jul.
Habitat: Roadside thickets, hedgerows, woodland edges
Elevation: 0–300 m

Distribution

V9 136-distribution-map.jpg

Introduced; P.E.I., N.Y., N.C., Tenn., Tex., Vt., Europe

Discussion

A rare introduction from Europe, Rosa tomentosa was reported by P. A. Rydberg (1918) from North Carolina and Texas and collected by Fernald (GH) in Queens County, Prince Edward Island. The species is also reported to occur in disturbed areas in New York, Tennessee, and Vermont (USDA PLANTS database). Whether the species has persisted at any of these occurrences is unknown; it is not currently included in the flora of Canada (H. G. Scoggan 1978–1979; VASCAN).

Rosa tomentosa is best recognized by its climbing habit, leaflets that are abaxially, and sometimes adaxially, tomentose or pubescent, and relatively long petioles. Sepals are spreading or reflexed after anthesis and deciduous when hips mature. Prickles are usually erect, and the stylar orifices are small (1 mm diam.).

Selected References

None.

Lower Taxa

None.

"dm" is not declared as a valid unit of measurement for this property.

... more about "Rosa tomentosa"
eglandular +  and glandular +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
grayish green +  and pale +
pubescent +  and glabrous +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Walter H. Lewis +, Barbara Ertter +  and Anne Bruneau +
pale green +
exfoliating +
compound +  and simple +
opposite +  and alternate +
setose-glandular +  and stipitate +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
2.2 cm22 mm <br />0.022 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
lustrous +  and dull +
smooth +  and rugose +
orbiculate +  and ovatelanceolate or elliptic +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
? (?) +  and ? (?) +
8mm +  and 22mm +
persistent +
1.3 cm13 mm <br />0.013 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
ovatelanceolate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
free +  and distinct +
Harsh downy-rose +
1-16(-50)-flowered +
P.E.I. +, N.Y. +, N.C. +, Tenn. +, Tex. +, Vt. +  and Europe +
not +  and aggregated +
0–300 m +
3.5 cm35 mm <br />0.035 m <br /> (5 cm50 mm <br />0.05 m <br />) +
not +  and aggregated +
eglandular +  and glandular +
urceolate +, pyriform +, oblong +, ellipsoid +, ovoid-obovoid +  and globose +
resin-scented +
Roadside thickets, hedgerows, woodland edges +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
stipitate-glandular +  and glabrous +
globose +, ovoid +  and oblong +
leathery +  and fleshy +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
conic +  and flat +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
purplish black +, purplish red +, orange-red +  and red +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
setose +  and stipitate-glandular +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
leathery +  and fleshy +
4 cm40 mm <br />0.04 m <br /> (?) +
1-16(-50)-flowered +
crassinucellate +
3-foliate +  and compound +
7.5 cm75 mm <br />0.075 m <br /> (11 cm110 mm <br />0.11 m <br />) +
deciduous +
5 cm50 mm <br />0.05 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
membranous +  and leathery +
petiolulate +  and subsessile +
elliptic +  and obovate more or less oblong obovate-elliptic lanceolate-elliptic or obovate-oblong +
ciliate-glandular +, stipitate +, glandular-serrate +  and eglandular +
multi-serrate +  and 1-serrate +
glandular-ciliate +
pinnatifid +
distinct +
1 +  and 1.5 +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
inferior +  and superior +
clustered +, biseriate +  and superposed +
1-16(-50)-flowered +
1.1 cm11 mm <br />0.011 m <br /> (2 cm20 mm <br />0.02 m <br />) +
stipitate-glandular +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
White (?) +  and Pink (?) +
free +  and distinct +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1.7 cm17 mm <br />0.017 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Flowering Jun–Jul. +
adnate +, free +, connate +  and distinct +
2.5mm +  and 3.5mm +
flattened +
tomentulose +
0.5 cm5 mm <br />0.005 m <br /> (?) +
not arillate +
deciduous +
free +  and distinct +
reflexed +, spreading +  and erect +
ovatelanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
rarely densely puberulent +  and tomentose +
Introduced +
free +  and distinct +
branched +  and simple +
procumbent +  and climbing +
1 +  and 20 +
1.6 cm16 mm <br />0.016 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
persistent +
villous +  and glabrous +
not elongate +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
eglandular +  and glandular +
Rosa tomentosa +
Rosa sect. Caninae +
species +
4mm +  and 5mm +
stipitate-glandular +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
13 +  and 20 +
inconspicuous +
enlarged +  and small +
not +  and rhizomatous +
shrub +  and climbing +