12 
They comprise Vol. I. of Sloane’s Natural History of Jamaica, 
which, though two hundred years old, contains several rare and 
only recently re-discovered species. The numbers run to one hun- 
dred and three, but these include a few flowering plants which he 
thought to be allied to ferns. Most of the specimens are in ex- 
cellent condition. Sloane’s collections in Jamaica and adjacent 
islands extended over a period of fifteen months and formed the 
foundation of the immense collections which he bequeathed to 
the British Museum. His classification of ferns and the synonyms 
used are superseded, but the author derived much benefit by 
studying these old types. 
Layia glandulosa, Hook. and Arn. (Curtis’s Bot. Mag., xlii., 
Tab. 6856. The specimen figured flowered at Kew in the 
open border, July, 1885. 
Martha's Vineyard and Nantucket—On the Flora of. J.H. Red- 
field. (Proc. Acad. Nat. Sci., Phila., (1885), pp. 378-379.) 
The northern portion of the Island of Martha’s Vineyard 
rises into rounded hills of considerable elevation, composed of 
gravelly drift, strewn occasionally with large boulders. The more 
central portion consists of level plains of gravel covered with oaks, 
mostly Quercus obtusiloba. The general character of the flora 
is much like that found on the summits of the divides in southern 
New Jersey, though much more limited as to species. In Nan- 
tucket he had found the gravelly hills of much less height, the 
greater portion of the island consisting, in fact, of treeless plains. 
_ The most characteristic plant of these plains seemed to be Arcto- 
staphylos Uva-urst. The two species of Hudsonia abound, as do 
Polygala polygama, Myrica cerifera, and various Vaccinee. He 
saw many large patches of Corema Conradiz. But the most in- 
teresting feature is the existence here of three species of heath, 
possibly indigenous. Mrs. Owen, who published a preliminary 
catalogue of the Nantucket flora a few years ago, records Ca/- 
luna vulgaris and Erica cinerea as found upon the island. Mr. 
Redfield did not see the locality of Ca//una, but had the privilege 
of seeing that of Erica cinerea. This plant covers only an area 
of eight inches by ten, and has been known for a space of ten or 
twelve years. Since his visit the third species, Erica tetralix, 
