Rosa sherardii

Davies

Welsh Botanol., 49. 1813.

Common names: Sherard’s downy-rose
Introduced
Synonyms: Rosa omissa Déséglise R. subglobosa Smith
Treatment appears in FNA Volume 9. Treatment on page 92. Mentioned on page 90.

Shrubs, erect, forming small thickets; rhizomatous or not. Stems erect, glaucous, stout, 10–20 dm; distal branches often flexuous, bark reddish, ± pruinose or glaucous; infrastipular prickles single or paired, curved or erect, 6–9 × 3–4 mm, lengths ± uniform, internodal prickles sometimes present, aciculi absent. Leaves deciduous, 6–10 (–18) cm; stipules 10–14 × 3–5 mm, auricles 3–4 mm, margins short-stipitate-glandular, surfaces usually glabrous, sometimes pubescent, glandular; petiole and rachis with pricklets, pubescent, glandular; leaflets 5–7, terminal: petiolule 6–12 (–40) mm, blade ovate to narrowly or broadly elliptic, 30–45 (–65) × 15–30 (–45) mm, base rounded, sometimes slightly cuneate, margins 2-serrate or multi-serrate, teeth 17–26 per side, apex acute or rounded, abaxial surfaces light green, ± rugose, tomentose, densely resinous-glandular, glands reddish-brown, resin-scented, adaxial green, dull, tomentulose or glabrous, eglandular. Inflorescences panicles, 1–3 (or 4) -flowered. Pedicels erect to reflexed as hips mature, 12–17 mm, sparsely stipitate-glandular; bracts 2, ovatelanceolate, 16–21 × 4–6 mm, margins glandular, surfaces tomentose to puberulent or glabrous, glandular or eglandular. Flowers 2.5–3.5 cm diam.; hypanthium globose, 5–6 × 5 mm, eglandular or sparsely stipitate-glandular, neck absent; sepals spreading to erect, lanceolate, 15–20 × 3–3.5 mm, margins sometimes pinnatifid, tip 4–8 × 1.5–2 mm, abaxially densely stipitate-glandular; petals deep rose-pink, rarely white, 15–19 × 13–15 mm; carpels 52, styles lanate or villous, exsert 1–2 mm beyond stylar orifice (2.5 mm diam.) of hypanthial disc (4.3 mm diam.). Hips orange to bright red, globose or obovoid to ellipsoid, 13–18 × 11–18 mm, glabrous, sparsely stipitate-glandular; sepals persistent, usually spreading-erect. Achenes 40, tan, 5–5.5 × 2.5–3 mm. 2n = 28, 35, 42.


Phenology: Flowering Jun–Jul.
Habitat: Thickets of woodland margins, overgrown pastures, open scrub, wastelands, roadsides
Elevation: 300–400 m

Discussion

Known from northeastern Vermont, Rosa sherardii, a Scottish introduction in the nineteenth century, is an erect, compact shrub often forming rhizomatous thickets. Sepals are spreading to erect and persistent after anthesis, auricles are 3–4 mm, bracts 16–21 mm, and stylar orifices 2.5 mm diam.

Rosa sherardii occurs frequently in northern England and Scotland, as does the closely allied R. mollis. Rosa sherardii and, undoubtedly, R. mollis, both recently identified in the flora area by A. V. Gilman, were brought to Vermont by Scottish immigrants who settled and farmed there (Gilman 2012).

Selected References

None.

Lower Taxa

None.

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

... more about "Rosa sherardii"
42 +, 35 +  and 28 +
eglandular +  and glandular +
0.5 cm5 mm <br />0.005 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
2.5mm +  and 3mm +
glabrous +  and tomentulose +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Walter H. Lewis +, Barbara Ertter +  and Anne Bruneau +
Davies +
pruinose +
exfoliating +
compound +  and simple +
opposite +  and alternate +
setose-glandular +  and stipitate +
cuneate +  and rounded +
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 /> (4.5 cm45 mm <br />0.045 m <br />) +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
lustrous +  and dull +
smooth +  and rugose +
ovate +  and narrowly or broadly elliptic +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
? (?) +  and ? (?) +
15mm +  and 30mm +
persistent +
1.6 cm16 mm <br />0.016 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
ovatelanceolate +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
free +  and distinct +
Sherard’s downy-rose +
1-16(-50)-flowered +
Vt. +  and Europe +
not +  and aggregated +
300–400 m +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
not +  and aggregated +
eglandular +  and glandular +
urceolate +, pyriform +, oblong +, ellipsoid +, ovoid-obovoid +  and globose +
reddish-brown +
resin-scented +
Thickets of woodland margins, overgrown pastures, open scrub, wastelands, roadsides +
orange +  and bright red +
1.3 cm13 mm <br />0.013 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
stipitate-glandular +  and glabrous +
obovoid +  and ellipsoid +
leathery +  and fleshy +
1.1 cm11 mm <br />0.011 m <br /> (1.8 cm18 mm <br />0.018 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 /> (0.6 cm6 mm <br />0.006 m <br />) +
stipitate-glandular +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
leathery +  and fleshy +
5 cm50 mm <br />0.05 m <br /> (?) +
1-16(-50)-flowered +
crassinucellate +
3-foliate +  and compound +
10 cm100 mm <br />0.1 m <br /> (18 cm180 mm <br />0.18 m <br />) +
deciduous +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 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 2-serrate +
short-stipitate-glandular +
pinnatifid +
distinct +
inferior +  and superior +
clustered +, biseriate +  and superposed +
1-16(-50)-flowered +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
erect +  and reflexed +
stipitate-glandular +
1.2 cm12 mm <br />0.012 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
free +  and distinct +
1.5 cm15 mm <br />0.015 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
1.3 cm13 mm <br />0.013 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Flowering Jun–Jul. +
adnate +, free +, connate +  and distinct +
3mm +  and 4mm +
flattened +
Welsh Botanol., +
0.5 cm5 mm <br />0.005 m <br /> (?) +
not arillate +
persistent +
free +  and distinct +
spreading-erect +, spreading +  and erect +
lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
rarely densely puberulent +  and tomentose +
Introduced +
free +  and distinct +
branched +  and simple +
procumbent +  and climbing +
1 +  and 20 +
1 cm10 mm <br />0.01 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
persistent +
villous +  and lanate +
not elongate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
eglandular +  and glandular +
tomentose +  and puberulent or glabrous +
Rosa omissa +  and R. subglobosa +
Rosa sherardii +
Rosa sect. Caninae +
species +
4mm +  and 8mm +
stipitate-glandular +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
17 +  and 26 +
inconspicuous +
enlarged +  and small +
not +  and rhizomatous +