Rosa sect. Caninae

de Candolle ex Seringe

Mus. Helv. Bot. 1: 3. 1818.

Introduced
Treatment appears in FNA Volume 9. Treatment on page 89. Mentioned on page 76, 78, 98.

Shrubs, compact, usually forming thickets; rhizomatous, rhizomes absent or relatively short. Stems erect, arching, or spreading, 7–30 (–50) dm; distal branches glabrous, eglandular; infrastipular prickles paired or single, curved or appressed, rarely erect, flattened, stout, internodal prickles rare, smaller, or aciculi, sometimes absent. Leaves deciduous, rarely persistent, 4–11 (–18) cm, membranous to leathery; stipules persistent, adnate to petiole, auricles flared, margins entire, rarely slightly crenate, sometimes densely glandular-ciliate, stipitate-glandular or eglandular; leaflets 5–7 (–9), terminal: petiolule 5–17 (–40) mm, blade ovate, obovate, orbiculate, or elliptic, sometimes oval or ovatelanceolate, 10–45 (–65) × 8–30 (–50) mm, abaxial surfaces pubescent or tomentose (sometimes on midveins) or glabrous, eglandular or glandular, with or without resinous glands, adaxial pale, light, or dark green, sometimes glaucous, lustrous to dull, tomentulose or pubescent, sometimes glabrous. Inflorescences panicles, sometimes corymbs, 1–4 (–7) -flowered. Pedicels erect or reflexed, stout, (5–) 11–20 (–35) mm, glabrous, eglandular or stipitate-glandular; bracts persistent, 1 or 2, margins glandular-serrate or stipitate or ciliate-glandular. Flowers 2.5–5 cm diam.; hypanthium globose, ovoid, obovoid, oblong, or urceolate, glabrous, usually eglandular, base sometimes stipitate or setose-glandular; sepals persistent or deciduous, appressed-reflexed, spreading, or erect, lanceolate or ovatelanceolate, 10–25 × 2–5 mm, margins (outer) often deeply pinnatifid, abaxial surfaces glabrous, eglandular, densely glandular, or stipitate-glandular; petals single, pink or rose, rarely white; carpels 25–65, styles free, lanate or villous, rarely glabrous, stylar orifice 1–2.5 (–3.5) mm diam., hypanthial disc flat or conic, 2–5 mm diam. Hips red to purplish or orange, globose, depressed-globose, obovoid, ovoid, oblong, urceolate, ellipsoid, or pyriform, 10–25 × 6–22 mm, glabrous, sometimes setose, eglandular or stipitate-glandular; sepals deciduous or persistent, spreading, reflexed, or erect. Achenes basiparietal.

Distribution

Introduced; Europe, Asia, n Africa, also in Mexico, Central America, South America, Pacific Islands (New Zealand), Australia

Discussion

Species ca. 20 (5 in the flora).

All species of sect. Caninae are polyploid, mostly pentaploid (2n = 35), but also triploid (2n = 21) and tetraploid (2n = 28) or all three polyploid levels for a single species, with a hemisexual, matroclinal (maternal) reproduction unlike that known for any other flowering plant (H. Nybom et al. 2000). In addition, unknown elsewhere in Rosa, apomixis appears to occur to a limited extent among Caninae species, which complicates further their reproductive anomaly (G. Werlemark 2000). Even though over 350 taxa have been described in the section, the relatively few species now recognized are highly complex groups of microspecies, and the authors agree with the editors of W. J. Bean (1970–1988, vol. 4) that no attempt should be made in modern floristic works to take account of every character-state combination. Further, those editors believed that the species of Caninae are cryptohybrids, that is, they are all products of ancient hybridizations between species that no longer exist, at least not in their primitive states.

In addition to the species treated here, Rosa obtusifolia Desvaux is marginally naturalized in California, New Mexico, and Virginia; it differs from R. canina in having hairy leaflets that are usually glandular abaxially.

Selected References

None.

Key

1 Sepals abaxially eglandular; prickle lengths ± uniform; leaflets abaxially glabrous, rarely pubescent or tomentose on midveins, eglandular; bracts 6–18 × 4–5 mm, surfaces glabrous. Rosa canina
1 Sepals abaxially densely glandular or stipitate-glandular; prickle lengths varying or ± uniform; leaflets abaxially usually tomentose, rarely glabrous or pubescent, usually glandular; bracts 13–21 × 4–7 mm, surfaces usually tomentose, rarely glabrous or pubescent > 2
2 Leaflets abaxially usually densely viscid-glandular, glabrous or pubescent, glands with ripe apple scent; prickles curved or falcate. Rosa rubiginosa
2 Leaflets abaxially usually resinous-glandular, tomentose, glands resin-scented; prickles all erect or some curved > 3
3 Hips: sepals spreading or reflexed, deciduous after anthesis; stylar orifices 1 mm diam. Rosa tomentosa
3 Hips: sepals usually erect, persistent after anthesis; stylar orifices 2.5–3.5 mm diam > 4
4 Stipules 10–14 × 3–5 mm, auricles 3–4 mm; bracts 16–21 mm; sepals lanceolate, 15–20 × 3–3.5 mm; stylar orifices 2.5 mm diam. Rosa sherardii
4 Stipules 15–20 × 5–10 mm, auricles 5–8 mm; bracts 10–12 mm; sepals ovate-lanceolate, 20–25 × (4–)5 mm; stylar orifices 3.5 mm diam. Rosa mollis

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

... more about "Rosa sect. Caninae"
eglandular +  and glandular +
stipitate-glandular +, glandular +, glabrous +, tomentose +  and pubescent +
dark green +, light +  and pale +
glabrous +, pubescent +, tomentulose +  and glaucous +
lustrous +  and dull +
Walter H. Lewis +, Barbara Ertter +  and Anne Bruneau +
de Candolle ex Seringe +
gray +, red +  and brown +
exfoliating +
compound +  and simple +
opposite +  and alternate +
setose-glandular +  and stipitate +
not 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 cm10 mm <br />0.01 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
lustrous +  and dull +
smooth +  and rugose +
ovatelanceolate +, oval +, elliptic +, orbiculate +, obovate +  and ovate +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
? (?) +  and ? (?) +
8mm +  and 30mm +
persistent +
free +  and distinct +
1-16(-50)-flowered +
Europe +, Asia +, n Africa +, also in Mexico +, Central America +, South America +, Pacific Islands (New Zealand) +  and Australia +
not +  and aggregated +
2.5 cm25 mm <br />0.025 m <br /> (5 cm50 mm <br />0.05 m <br />) +
not +  and aggregated +
eglandular +  and glandular +
urceolate +, pyriform +, oblong +, ellipsoid +, ovoid-obovoid +  and globose +
red +  and purplish or orange +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
stipitate-glandular +, setose +  and glabrous +
pyriform +, ellipsoid +, urceolate +, oblong +, ovoid +, obovoid +, depressed-globose +  and globose +
leathery +  and fleshy +
0.6 cm6 mm <br />0.006 m <br /> (2.2 cm22 mm <br />0.022 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 +
Urceolate (?) +, Oblong (?) +, Obovoid (?) +, Ovoid (?) +  and Globose (?) +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
leathery +  and fleshy +
1-16(-50)-flowered +
crassinucellate +
3-foliate +  and compound +
11 cm110 mm <br />0.11 m <br /> (18 cm180 mm <br />0.18 m <br />) +
persistent +  and deciduous +
4 cm40 mm <br />0.04 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 +
stipitate-glandular +  and glandular-ciliate +
pinnatifid +  and crenate +
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 />) +
reflexed +  and erect +
stipitate-glandular +  and glabrous +
1.1 cm11 mm <br />0.011 m <br /> (2 cm20 mm <br />0.02 m <br />) +
White (?) +, Rose (?) +  and Pink (?) +
free +  and distinct +
1.7 cm17 mm <br />0.017 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
adnate +, free +, connate +  and distinct +
flattened +
Mus. Helv. Bot. +
0.5 cm5 mm <br />0.005 m <br /> (?) +
not arillate +
persistent +  and deciduous +
free +  and distinct +
erect +, reflexed +, spreading +  and appressed-reflexed +
ovatelanceolate +  and lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
rarely densely puberulent +  and tomentose +
Introduced +
free +  and distinct +
branched +  and simple +
procumbent +  and climbing +
spreading +, arching +  and erect +
1 +  and 20 +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
persistent +
glabrous +, villous +  and lanate +
not elongate +
glandular +  and eglandular +
tomentose +, pubescent +, puberulent +  and glabrous +
Rosa sect. Caninae +
Rosa subg. Rosa +
section +
prolonged +
inconspicuous +
enlarged +  and small +