ROSA 20 I 



5. Loddon. Risely. Early. Bearwood. Windsor. Maidenhead. 

 Stubbing's Heath. Bisham. Hurst. Wokingham. Blackwater. 



Var. DEciPiENs (Baker, I.e., as a var. of R. canina, and Duniortier in 

 Bull. Soc. Bot. Belg. vi. (,1867) 55, as a var. of-R. tomentella). 



2. Oek. Near South Hinksey. 



R. obtusifolia is found in all the bordering counties ; in Bucks, at Eton 

 Wick, Brill, Marlow. 



R. canina, Linn. Sp. PI. 492 (1753). Dog Rose. 



Top. Bot. 152. Syme, E. B. iii. 212, 472. Nynian, 234-5. Fl. Oxf. 106. 

 Native. Septal. Hedges, thickets, &c. Generally distributed and 

 frequent except on the peaty heaths of the south-west. Shrub. 

 May-June. 

 First record. R. canina, Mavor's Agr. Berks, 1809. The specimen of 

 R. canina, from Sonning, of Mr. S. Ruclge in Herb. Brit. Mus. 1800 

 is immature without a barren branch ; the prickles are very 

 slightly curved, fruit and peduncles bristly, leaves densely downy 

 on both sides ; it is perhaps a form of R. tomentosa. 

 Var. LuTETiANA (Leman in Bull. Soc. Phil. Paris (1818^ 93, as a species). 

 Top. Bot. 152. Syme, E. B. iii. 226. E, B. t. 992. Fl. Oxf. 106. 



This form is one of the commoner varieties of R. canina, being found 

 plentifully in all the districts. 



Var. ANDEGAVENSis (Batard, Fl. Maine-et-Loire, 189 (1809), as a 

 species). Desp. Roset. Gall. 88 (1828). R. canina, var. hispida, Desv. 

 Journ. de Bot. ii. (1813) 115. Syme, E. B. iii. 219. 



1. Isis. Besilsleigh. Cumnor. 2. Ock. Tubney. 3. Pang. 



Langley Wood border, W, M. Rogers. 4. Kennet. Mortimer, 



Tufnail. Lambourn. Near Reading. Kintbury. Newbury. 



5. Loddon. Winkfield. Binfield. Wargrave. 



Var. suRCULOSA (Woods, Linn. Soc. Trans, xii. (181 7' 228, as a 



species). Hooker, Brit. Fl. 236 (1830). 



1. Isis. Cumnor. Appleton. 2. Ock. Wootton. Bagley. Wittenham. 



3. Pang. Yattendon. 5. Loddon. Near Strathfieldsaye. 

 This form is not very uncommon ; it is found in old hedges, and may 

 probably be a luxuriant form of Luteiiana or dumalis, under which 

 group M. Crepin has placed all my specimens named by Mr. J. G. 

 Baker, the Rev. W. M. Rogers, &c., as var. surculosa. 



Var. SPHERICA (Gi'en. in Schultz, Arch. Fl. Fr. et Allem. (1855) 333, 

 as a species). 



1. Isis. Wytham. Near Eynsham. 2. Ock. Near Frilford. Near 



Bagley. Wootton. 5. Loddon. Near Wellington College. 



M. Crepin refers all my British specimens of R. spherica to the 

 Lutetiana group. 



Var. SENTicosA (Achar. in Kongl. Vetenskaps Akad. Handl. Stockh. 



