308 THE JOURNAL OF BOTANY 
SHORT. NOTES. 
A Wanverine Licnen.—At the meeting of the Essex Field 
Club on 28th November, ‘told, «Mr. R. Paulson exhibited speci- 
mens of the lichen Parmelia revoluta var. concentrica Cromb., 
i Bee 
in the auturan of 1855 on Melbury Hill near "ehalsahriry Devon, 
and at that time a suggestion was made that certain Parmelias 
were blown from trees on to the most exposed part of the hill, 
over and blow ut by the wind. No recent records of the 
finding ses the slate on Malviey Hill have been made. In 1904 
ourfield vee ae variety on the downs near Sea- 
ds 
ge 08 
Poe 
abundant on a small area of down country near Seaford. Search 
has been made this year—1914—by Somerville Hastings and 
myself of the downs between Hastbourne and Seaford, but we 
have failed to tind it anywhere but at the spot already indicated. 
The plant readily breaks up in wet weather, so that pieces of all 
sizes get scattered about on the grass. The larger pieces are 
points. The outside of a sphere is greenish grey, while the inner 
under surface of the thallus is almost black. The young branches 
grow over and cover the older ones, so that when cut thro a 
the plant exhibits a series of concentric layers. There no 
trees less than three quarters of a mile from the Seaford niu 
for this _ and ieee are few and far between on this portion 
of t On none of the trees in the Seaford area was Par- 
melia Resi tot ey “After careful search three flints were seen 
on which the lichen was growing, and there is no doubt whatever 
The plants are fixed by the rhizine very loosely and easily break 
off, especially in wet weather. After breaking from the stone the 
very small. 4 was the same case with the Melbury plants. The 
exhibit included some excellent photographic lantern slides by 
Dr. Somerville i ”-—Hissex Naturalist, xviii. 25. 
AZOLLA IN THE Lea VanLey.—Mr. A. W. Graveson having 
told me that Azolla beethn at Dobbs’ Weir, on the Lea Navi- 
gation near Broxbourne, it seemed desirable to ascertain its range 
eed Seer hoe es F BoE Sep Pa (eee. Pr ae yee 
£SNE eeete |. - 1 Smee ean aprons. Me pe a Se alas Lace oe ah eee aera a 
