A HISTORY OF CORNWALL 



easts, Bab. (R. incurvatus, Bab., FL Plym. p. 113), described as a new 

 species by Professor Babington in Journ. Bot. 1890, pp. 338, 339. 



These were both unknown for the British Isles until discovered in 

 the neighbourhood of Plymouth, although now ascertained to be rather 

 widely distributed in Great Britain and Ireland. R. dumnoniensis, still 

 undetected on the continent of Europe, has also been found at the Lizard 

 and in the Channel Islands. 



Among the other rare brambles discovered by Mr. Briggs within 

 twelve miles of Plymouth on the Cornish side may be specially men- 

 tioned R. affinis var. Briggsianus, Rogers (./?. affinis, FL Plym.} ; R. leu- 

 candrus, Focke (R. hirtifolius, Fl. Plym.} ; R. ramosus, Briggs (Journ. Bot. 

 1871, pp. 330-2); R. si/vaficus, Wh. & N. (Journ. Bot. 1890, pp. 

 274-6); R. oigocladus, Muell. & Lefv. (R. fusco-ater, Fl. Plym.}. About 

 six additional forms have been observed in other parts of east Cornwall, 

 raising the number now known for that division of the county to 36 

 or 37. 



The brambles of west Cornwall are much more imperfectly known. 

 About 28 forms in all have been recorded for this division, but most of 

 them are reported from one or two localities only. Of these 5 are at 

 present unknown in east Cornwall. So the county as a whole may now 

 be credited with a total of about 42 forms, a number which will prob- 

 ably be increased considerably by further research. 



In the west thus far the Penzance neighbourhood seems to have 

 been most closely worked. Thus of the 5 Cornish forms at present 

 peculiar to this division 4 come from that neighbourhood, viz. R. ne- 

 moralis, P. J. Muell.; R. clivicola, A. Ley; R. amplificatus, Lees, and 

 R. adornatus, P. J. Muell.; while the fifth, R. dasyphyllus, Rogers (R. 

 pallidus, Bab., not of Wh. & N.), has been recorded from woods at 

 Falmouth and Mawnan. This last form, which is far the most abundant 

 glandular bramble in the north, is very thinly scattered in the south of 

 England. 



MENTH^E 



Two only of the species enumerated in the London Catalogue are 

 wanting from Cornwall, viz. M. gracilis and pratensis. In the following 

 table of distribution the numerals correspond with the divisions of the 

 county. 



Mentha rotundifolia, Huds. 1-8 b. subglabra (Baker). 3, 5, 6 



alopecuroides, Hull. 3, 5 c. citrata (Ehrh.). 7, 8 



longifolia, Huds. 1-3, 5-8 Mentha sativa, Linn. 1-8 



b. nemorosa. 4, 5 b. paludosa (Sole). 1-3, 6-8 



c. mollissima (Borkh.). 2-4 c. subglabra, Baker, z, 4-7 



viridis, Linn. 2, 3, 5-8 rubra, Sm. 8 



b. crispa, Hook. 5, 6 gentilis, Linn. 2-4, 6-8 



piperita, Linn. c. Pauliana (F. Schultz.). 5, 6 



a. officinalis (Hull). 1-8 arvensis, Linn. 1-8 



b. vulgaris (Sole). I, 3, 5, 7, 8 b. Nummularia (Schreb.). 3 



pubescens, Willd. e . agrestis (Sole). I, 4 



a. palustris (Sole). 5, 7, 8 Pulegium, Linn. 2-8 



b. hircina (Hull). 5 b. erecta, Syme. 3, 5-8 



hirsuta, Huds. 1-8 



72 



