350 >fOTES UESPEUTIXG THE llOSKS OF PLYMOUTH. 



Cornwall. The branches of the Ilarestone plant exhibit a curious 

 abnormal development of setae and aciculi, recalling the aspect of the 

 least prickly species of the Spinosissma group ; and a similar armature 

 prevails to some extent on those of the Hemerdon plant. A very beau- 

 tiful Eose, called by Mr. Baker, in his Monograph, an extreme sped- 

 men of this variety, witli calyx-tube uniformly prickly all over its sur- 

 face, and with sepals thickly covered with setpe on the back, I found, 

 a few years ago, near Ernesettle, in the parish of St. Budeaux, grow- 

 ing in two hedges, but since then it has been destroyed at one spot, 

 through the levelling of the hedgebank. Another bush of the same 

 form still exists in a hedge near Budockshed, in the same neighbour- 

 hood ; and two very large ones grow about a mile from this among 

 copse»wood at Warleigh, by the side of Taraerton Creek, a saltwater 

 inlet from the Tamer. Var. colUna, Jacq. About Plymouth this is 

 the most abundant example of the aciculate-peduncled forms of R. ca- 

 t/iua, being in the immediate neighbourhood of the town, and in most 

 parts of the district one of the commonest Roses. We have two forms; 

 that which I regard as the most typical has nearly erect branches, 

 strongly hooked prickles, leaves of a very dark green, and young shoots, 

 prickles and other parts much tinged with vinous purple ; the two 

 colours forming a remarkably striking contrast with the petals, as these 

 are white when the flowers are fully open, though creamy when ex- 

 panding. It comes into bloom a little later than do our other common 

 canina forms, and sometimes it has as many as from fifteen to twenty 

 flowers on its most luxuriant branches. Mr. Baker has given a full 

 description of this in this Journal, Vol. III. (1865), p. 82. The other 

 form is also common about Plymouth, though less so than that just 

 described. It differs considerably from it in general appearance when 

 growing, so that the practised eye can then readily distinguish 

 it from the other ; but dried specimens of the two are found to be 

 greatly alike, and I, in deference to the opinion of Mr. Baker, give this 

 second plant as only a form of colUria. It has -long arching shoots; 

 stout prickles ; leaves sharply pointed, glabrous and rather glossy 

 above, hairy at least on the midrib and principal veins beneath ; serra- 

 tures simple, sharp, and regular ; petioles moderately prickly, with a 

 few scattered hairs, and an occasional sela ; stipules and bracts glabrous 

 on the back, sparingly gland ciliated ; peduncles long, copiously fur- 

 nished, in most typical examples, with setic, but these arc occasionally 



