A LIST OF BRITISH ROSES 65 



/ Main prickles uniform, or almost so, quite distinct from the acicles, 



2 1 usually hooked, or at least falcate 3 



} Main prickles considerably unequal, often running into the acicles, 

 I straight, or if hooked, not strong 5 



I Flowers white ; prickles long, slender Gremlii. 



° \ Flowers rose ; prickles stout {B. Eglanteria agg.) 4 



[ Fruit subglobose ; sepals reflexed or spreading, sometimes even erect' 



.1 but not persistent apricomm. 



1 Fruit ovoid ; sepals usually erect, sometimes spreading, persistent 

 [ comosa. 



I All prickles slender, straightish 6 



5- Prickles very numerous, the larger ones hooked; fruit hispid-glan- 



i dular or aciculate echinocarpa. 



I Leaflets about i in. long or less, suborbicular ; fruit subglobose 

 G] rotunclifolia. 



( Leaflets large, oval ; fruit ovoid comosella. 



X. GROUP MICRANTHA. (See p. 47.) 

 [Peduncles smooth ; leaflets large, broadly oval, only slightly glandular 



1 j beneath Briggsii. 



(Peduncles hispid-glandular ; leaflets more or less densely glandular 2 

 /Stem with acicles distinct from main prickles, usually just below 



1)1 inflorescence 3 



" I Stem without acicles (except very rarely below inflorescence in mi- 

 \ crantha) 4 



1 Prickles falcate ; leaflets small or medium ; fruit subglobose, hispid 

 all over trichocarpa. 

 Prickles straightish; leaflets large ; fruit ovoid or urceolate, hispid at 

 base sylvicola . 



/Leaflets small, elliptical, wedge-shaped at base ; fruit small, subglobose 



. I hystrix. 



[Leaflets medium or large, I'ounded or somewhat narrowed below; 



I fruit ovoid or urceolate 5 



i Flowering branches prickly ; fruit usually smooth ; leaflets oval, sub- 

 glabrous, or only slightly hairy beneath permixta. 

 Flowering branches unarmed or nearly so; fruit often hispid; leaflets 

 elliptical, pubes ;ent all over beneath, or at least on the primary 

 nerves micrantlia. 



y. GROUP ELLIPTICA. (See p. 49.) 



Leaflets glabrous above, thinly hairy and finely glandular beneath ; 



fruit subglobose; styles villous cryptopoda. 



Leaflets pubescent both sides, densely glandular beneath ; fruit 



urceolate; styles hispid Billietii. 



z. GROUP AGRESTIS. (See p. 49.) 



l' Leaflets glabrous, very small and narrow, not more than 9 by 4 lines, 



1 j often less, narrowed at each end agreatis. 



(Leaflets more or less hairy, at least beneath and on petiole 2 



2 (Leaflets large, 18 by 12 Hues or more jmhescens. 



(Leaflets medium 3 



., (Fruit quite ovoid subeuneata. 



(Fruit subglobose helncnsis. 



Journal op Botany, Dec. 191L [Supplement.] ;/ 



