MR. B. D. JACKSON ON HIBISCUS PALUSTRIS. 9 
from Bradypus and Cholopus, naming them respectively Pleuro- 
coccus Bradypi and P. Cholepi. Mr. Sorby regards them as pos- 
sibly identical, the differences being rather due to conditions of 
growth than specific in character, 
Mr. Sorby has made a spectroscopic examination of the Alen 
found on Cholopus-hair, and compared the same with Chlorococcum, 
the analysis of which is as under-mentioned. 
Chlorococcum. Sloth’s hair. 
Blue chlorophyll............ 48 53 
Yellow 55 2008 s 10 17 
Xanthophyli ` ct. 16 17 
Yellow xanthophyll......... 16 8 
Orange e RE 6 1 
Liehnoxanthine ............ + 4 
100 100 
Note on Hibiscus palustris, Linn., x certain allied Species. 
By B. Daypon Jackson, Sec.L.S. 
(Read April 21, 1881.] 
WueEN determining the modern equivalents for the old names 
given by Gerard in his * Catalogus,’ I assigned the name Hibiscus 
palustris, Linn., to the plant which then stood under the name of 
* Bamia, Strange Marsh Mallow.” Subsequently Mr. W. B. 
Hemsley, in the “Garden, vol. xiv. (1879) p.486, doubted the 
correctness of this determination, basing his objection upon the 
figure given in Gerard's ‘ Herball, which is from the same block 
as that given by Tabernemontanus in his ‘ Hicones.’ I was at 
that time unable to recall the steps I had taken in arriving at 
my conclusion, and could only say that I had, as far as possible, 
ascertained the plant most probably intended by the old herbalist. 
Some time since, however, I recurred to the subject; and the 
outcome of these investigations into the history of it I now offer 
as a note to this Meeting. 
Of the thirty species of Hibiscus named by Linnzus, there were 
two which chiefly concern us, namely, H. Moscheutos and H. pa- 
lustris. The former was chiefly distinguishable by the peduncle 
being adnate to the petiole, the latter having the peduncle free in 
the axil of the leaf. 
These two species were kept up as distinet by succeeding 
authors, Cavanilles illustrating them in juxtaposition on one of 
LINN. JOURN.—BOTANY, VOL. XIX. c 
