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
