232 DETERMINATION OF THREE 
form, direction, and texture of the leaves, which are composed of a 
single layer of cellules, except at the thickened margin. 
Another species of Grimmia, new to Britain, viz. G. commutata, 
Hüb., has been found on the Hill of Moncrieff (barren), by Dr. 
J. Stirton, of Glasgow, July, 1864, and since on Stenton Rock (with 
fruit), by Dr. F. B. White, December, 1865. It is allied to G. ovata, 
Web. and Mohr, but differs in the channelled leaves, not reflexed in 
the margin, and in the dioicous inflorescence.—W. Wilson in ‘ The 
Naturalist,’ vol. ii. p. 344. 
DETERMINATION OF THREE LINN/EAN SPECIES OF 
CASSINIACEH FROM THE LINN/EAN HERBARIUM.* 
By C. H. Scuurtrz-Breontinus. 
During a sojourn in London from the 21st of May to the 4th of June 
last, which was as enjoyable as it was instructive to me, I examined 
all the Cassiniacez in the herbarium of Linnzus now in the possession 
of the Linnean Society. 
The plants have only the generic and specifie names attached to 
them, and as there are no indications of the locality, there are frequent 
doubts as to their native country. I observed one exception in the 
case of the specimens which Linnzus obtained from Patrick Browne, 
from Jamaica, which are all marked P, B 
Great eonfusion has in this way arisen in connection with the plants 
sent from North America, by Kalm, a pupil of Linnæus’s, who was in 
that country from 1747 to 1749. Let me mention one or two in- 
Asa Gray, who has examined the herbarium of Linneus, says, in 
Torrey and Gray’s ‘Flora of North America, vol. ii. p. 446, under 
Senecio Kalmii, Nutt., “We are inclined to suspect some mistake 
respecting the habitat of several Linnean species, said to have been 
collected in Canada by Kalm.” Asa Gray’s supposition is well 
founded. Canada was a province of France at the time of Kalm’s 
visit. It is probable that he received from a French botanist in 
* The author has kindly favoured us with an early proof of this article, from 
which we have made our translation.—Ep. 
