226 . Mr. Woops on the British Species of Rosa. 
3. simpliciuscula. Calyx-leafits nearly simple. A slight difference 
. in the general habit induced me to gather this plant when I 
observed it near Betchworth in Surrey; but I did not then 
notice the character by which I now distinguish it. 
Among the British Roses with uncinate prickles and leaves 
entirely without pubescence, R. canina may be distinguished 
from R. sarmentacea by the simple serratures ; from R. surculosa 
by its carinate leaves, and by the weak and slightly-hooked 
prickles of the petioles ; from R. arvensis by its distinct and woolly . 
styles. R: sempervirens is in habit and even in family quite a 
distinct plant; yet it is difficult to express any decided marks of 
difference, except in the styles, which, though sometimes slightly 
porrect in R. canina, are never lengthened out as in that species. 
Afzelius, De Rosis Suecanis Tent. viii. 46, describes seven varie- 
ties of Rosa canina, which he considers only a portion of the. num- 
ber of species into which this plant must be divided. "The first 
seems clearly to be the R. collina y of this essay. The second also 
I should probably have enumerated among the varieties of that 
species, but it is remarkable for a large globular hip as large as 
a plum—a very uncertain mark of comparison. The third plant 
is R. canina Ê; the fourth, R. canina y; the fifth, R: canina « ; the 
sixth appears to belong to my R. surculosa. R. rubifolia of Vil- 
lars is quoted under the seventh of this list of Roses; but Dr. Af- 
zelius. does not seem to be of opinion that the Swedish Rose is of 
the same species as that of Dauphiné; the former is perhaps 
rather the R. canina ò of this essay. Besides these, he mentions 
many other Roses of this tribe as existing in his collection, which 
not having seen alive he does not venture to describe. The various 
appearances. of this. Rose are therefore probably as numerous in 
Sweden as in this country. 
Desvaux, 
