Rosa canina

I. Klášterský, 1968, 10. Rosa L., Flora Europaea, Volume 2, Rosaceae to Umbelliferae, Cambrdige: Cambridge University Press, pp. 35-42 : 29

(18-31). R. canina group.

Stems up to 5 m, erect. Prickles usually curved or hooked, stout, usually all similar. Leaflets ovate, obovate, elliptical or suborbicular, glabrous or pubescent, eglandular or with a few glands on the main veins beneath, more rarely with numerous glands, the glands not strongly scented. Pedicels glabrous or stipitate-glandular. Flowers solitary or 2-5. Sepals 3-5 mm wide, usually deflexed after anthesis but sometimes erect or patent. Petals white or pink. Disc flat. Styles short or long, glabrous, villous or lanate. Fruit globose, ovoid or ellipsoid, glabrous or stipitate-glandular.

1 Sepals usually deflexed and deciduous in fruit; styles usually glabrous or villous, rarely lanate 2 Leaflets glabrous

3 Pedicels glabrous •

4 Leaves eglandular

5 Disc narrow, the orifice more than 1 mm in diameter 24. subcanina

5 Disc wide, the orifice not more than 1 mm in diameter 18. canina

4 Leaves glandular, at least on the rhachis, petioles and veins

6 Leaflets with glandular teeth 21. nitidula

6 Leaflets with eglandular teeth 19. squarrosa

3 Pedicels stipitate-glandular 7 Disc narrow, the orifice more than 1 mm in diameter 24. subcanina

7 Disc wide, the orifice not more than 1 mm in diameter 8 Leaflets serrate, with short and rather wide teeth 20. andegavensis

8 Leaflets biserrate or compound-serrate, with long, acuminate teeth

9 Styles glabrous; leaves usually eglandular or rarely sparsely glandular on petiole and rhachis 22. pouzinii 9 Styles villous; leaves glandular on veins, petiole and rhachis 21. nitidula

2 Leaflets hairy

10 Pedicels glabrous

11 Disc narrow, the orifice more than 1 mm in diameter 26. subcollina

11 Disc wide, the orifice not more than 1 mm in diameter 12 Leaves usually glandular beneath 28. obtusifolia

12 Leaves usually eglandular beneath 29. corymbifera

10 Pedicels ± stipitate-glandular

13 Leaves usually densely glandular beneath; styles usually long 31. abietina

13 Leaves with glands confined to rhachis and petiole; styles usually short 30. deseglisei

1 Sepals usually erect or patent in fruit, persistent; styles lanate 14 Acicles present 27. rhaetica

14 Acicles absent

15 Stems usually reddish; leaflets glabrous or rarely with a few scattered glands beneath 23. vosagiaca

15 Stems usually green; leaflets hairy and usually glandular 16 Sepals erect or patent in fruit; leaflets densely appressedhairy beneath 25. caesia

16 Sepals deflexed or patent in fruit; leaflets usually sparsely hairy beneath 26. subcollina