206 MR. J. G. baker's monograph of BRITISH ROSJiS. 



" on a rock on one of the mountains at tlie head of Clora, near 

 the limits of perpetual snow" (hence his name nivalis). Accord- 

 ing to a note by Turner in the Kew herbarium, Dr. "Walker's 

 Hebridean plant called involuta is this variety. It appears to 

 reach its maximum of frequency In the north of England. Seve- 

 ral stations are known in the north of Ireland. -B. gracilis, 

 AVoods, Linn. Trans, xii. p. 186, Herb. 21, Smith, Engl. El. ii, 

 p. 379, is not more than a robust condition of this variety with the 

 prickles, like the rest of the plant, abnormally stout and a little 

 curved, i?. villosa, Engl. Bot. t. 583, is drawn from this, with 

 the exception of the friiit, Avhich is that of S. pomifera ; and it is 

 the latter that Smith had in view in his observations. 



I 



h 



Var. DoNiANA {Woods). 



R. DoNiANA, JVoods, Linn. Trans, xii. p. 185, Herb. 18-20; Smith, 

 EngL Flora, ii. p. 378 ; Borrer, E. B. S. t. 2601. 



R. Sabini ^, DoNiANA, LindL Mon. p. 59 ; Borrer, Brit. Fl. edit. 3, 

 p. 232. 



A form of dry exposed situations with leaflets more densely 

 hairy than in the last and consequently greyer green and softer ; 

 the calyx-tube and fruit densely prickly ; the flowers solitary and 

 sepals hardly, if at all, pinnate. 



Var. GRACiLESCENS, Baker. 



A robust Irish form, gathered in co. Antrim by Dr. Moore, 

 with leaves 3-3 1 inches long, ovate leaflets^ thinly hairy on both 

 aides, not at all glandular beneath, with copiously compound 

 toothing, the terminal one 15-16 lines long by nearly an inch 

 broad ; petioles with few or no aciculi and glandular setse ; 

 flowers 3-6 in a cluster, aciculate peduncles, and naked elliptical 

 calyx-tube. 



tew 



Winch 



R. Sabini )3, Smith, Eng. Flora, ii. p. 380. 



Intermediate between Sahini and the original involuta. Leaflets 

 with the teeth sharper and less compound than in Sabini, glabrous 

 (when mature) on the upper surface, hairy principally on the ribs 

 and inconspicuously glandular beneath; calyx-tube sometimes, 

 but not always, naked; sepals as compound as in Sahini. 



I have gathered this lately in the original station near New- 



* 4 



castle and also in North Yorkshire, aud received it from Derry 

 from Dr. Moore: 



