Rosa mollis

Smith in J. E. Smith et al.

in J. E. Smith et al., Engl. Bot. 35: plate 2459. 1812.

Common names: Soft downy-rose
Introduced
Treatment appears in FNA Volume 9. Treatment on page 93. Mentioned on page 90, 92.

Shrubs, forming large thickets; rhizomatous. Stems usually spreading and arching, erect, 8–15 (–20) dm; distal branches erect or spreading, bark reddish when exposed, pruinose when young or shaded; infrastipular prickles paired, erect, 5–6 × 3–4 mm, lengths ± uniform, internodal prickles similar or smaller, mixed with aciculi. Leaves deciduous, 8–11 (–14) cm; stipules 15–20 × 5–10 mm, auricles 5–8 mm, margins glabrous or ciliate, surfaces usually puberulent to tomentulose, sometimes glabrous, eglandular; petiole and rachis without pricklets, pubescent, eglandular; leaflets (5–) 7, glands resin-scented when crushed, terminal: petiolule 10–17 mm, blade elliptic to ovate, 12–35 × 10–18 mm, base cuneate, sometimes rounded, margins 1–2-serrate, teeth 14–18 per side, apex acute, sometimes rounded, abaxial surfaces tomentose, resinous-glandular, sometimes eglandular, adaxial light green, dull, glabrous or mostly tomentulose. Inflorescences panicles, 1 or 2 (–5) -flowered. Pedicels erect or slightly reflexed, (5–) 15–35 mm, sparingly stipitate-glandular or eglandular; bracts (1–) 2, ovatelanceolate, 10–12 × 4–5 mm, margins irregularly glandular-serrate, surfaces glabrous or pubescent, eglandular. Flowers 3–4.5 cm diam.; hypanthium globose, 5–7 × 5–7 mm, stipitate-glandular or setose, neck absent; sepals spreading, ovatelanceolate, 20–25 × (4–) 5 mm, margins entire, tip 8–10 × 0.5–1 mm, abaxially densely glandular or stipitate-glandular; petals deep pink, rarely white, 9–16 × 10–16 mm; carpels 50–65, styles lanate, exsert 1.5 mm beyond stylar orifice (3.5 mm diam.) of hypanthial disc (5 mm diam.). Hips red to purplish, globose to depressed-globose, 11–16 × 12–15 (–20) mm, glabrous, sometimes setose, stipitate-glandular; sepals persistent, erect. Achenes 60, dark tan to black, 4–5 × 1.5–2 mm. 2n = 28, 35, 42.


Phenology: Flowering Jun–Jul.
Habitat: Thickets, stream banks, roadsides, overgrown pastures
Elevation: 300–400 m

Distribution

V9 138-distribution-map.jpg

Introduced; Vt., n, c Europe

Discussion

Rosa mollis is introduced from Scotland.

Rosa mollis is closely allied to R. villosa Linnaeus; the two were treated as distinct by W. J. Bean (1970–1988) and A. V. Gilman (2012).

Selected References

None.

Lower Taxa

None.

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

... more about "Rosa mollis"
42 +, 35 +  and 28 +
dark tan +  and black +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1.5mm +  and 2mm +
tomentulose +  and glabrous +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Walter H. Lewis +, Barbara Ertter +  and Anne Bruneau +
Smith in J. E. Smith et al. +
pruinose +
exfoliating +
compound +  and simple +
opposite +  and alternate +
setose-glandular +  and stipitate +
rounded +  and cuneate +
4.5 cm45 mm <br />0.045 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
lustrous +  and dull +
smooth +  and rugose +
elliptic +  and ovate +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
? (?) +  and ? (?) +
10mm +  and 18mm +
persistent +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
ovatelanceolate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
free +  and distinct +
Soft downy-rose +
1-16(-50)-flowered +
spreading +  and erect +
Vt. +, n +  and c Europe +
not +  and aggregated +
300–400 m +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
not +  and aggregated +
eglandular +  and glandular +
urceolate +, pyriform +, oblong +, ellipsoid +, ovoid-obovoid +  and globose +
resin-scented +
Thickets, stream banks, roadsides, overgrown pastures +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
red +  and purplish +
1.1 cm11 mm <br />0.011 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
stipitate-glandular +, setose +  and glabrous +
globose +  and depressed-globose +
leathery +  and fleshy +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 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 +
0.5 cm5 mm <br />0.005 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 +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1-16(-50)-flowered +
crassinucellate +
3-foliate +  and compound +
11 cm110 mm <br />0.11 m <br /> (14 cm140 mm <br />0.14 m <br />) +
deciduous +
8 cm80 mm <br />0.08 m <br /> (11 cm110 mm <br />0.11 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 +
entire +, glandular-serrate +  and 1-2-serrate +
ciliate +  and glabrous +
pinnatifid +  and crenate +
distinct +
inferior +  and superior +
clustered +, biseriate +  and superposed +
1-16(-50)-flowered +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
reflexed +  and erect +
stipitate-glandular +
1.5 cm15 mm <br />0.015 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
White (?) +  and Pink (?) +
free +  and distinct +
0.9 cm9 mm <br />0.009 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
1.7 cm17 mm <br />0.017 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
Flowering Jun–Jul. +
adnate +, free +, connate +  and distinct +
3mm +  and 4mm +
flattened +
in J. E. Smith et al., Engl. Bot. +
0.5 cm5 mm <br />0.005 m <br /> (?) +
not arillate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
persistent +
free +  and distinct +
erect +  and spreading +
ovatelanceolate +
5 cm50 mm <br />0.05 m <br /> (?) +
rarely densely puberulent +  and tomentose +
Introduced +
free +  and distinct +
branched +  and simple +
procumbent +  and climbing +
erect +, arching +  and spreading +
1 +  and 20 +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
persistent +
not elongate +
1.5 cm15 mm <br />0.015 m <br /> (?) +
pubescent +, glabrous +, usually puberulent +  and tomentulose +
Rosa mollis +
Rosa sect. Caninae +
species +
8mm +  and 10mm +
stipitate-glandular +  and glandular +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
14 +  and 18 +
inconspicuous +
enlarged +  and small +