BOTANICAL EXCHANGE CLUB REPORT 67 
rootstock take a direction in line with the aerial stem when plants 
spring from ditch-banks or other sloping ground. Thus one finds 
it difficult to make out clearly those forms which differ little from 
each other, save in the direction of their rootstocks, e.g. Stevent 
and rectus, which are instanced by Townsend; and the sam 
hindrance lies in the way of a decision on many doubtful gather- 
ings.—JAMES W. WHITE. 
A corpaTaA Mill. Swithland Wood, August 7th, 1907. 
ground flora, Tilia cordata is undoubtedly indigenous at Swith- 
land.”—W. Brut. 
the books.—A. B. Jackson. 
OTENTILLA ERECTA Hampe var. sciaPHina (Zimm.). P. Tor- 
mentilla Neck. var. sciaphila Asch. & Gr. Syn. vi. 838 (1904). 
Sandy, ericetal places, Richmond Park, Surrey, August 28th, 1907, 
leg. A: B. Jackson & K. Domin. This 
only hitherto been recorded from East and West Cornwall by Mr. 
Davey (see Watson Exchange Club Report, 1905-06, p. 50), and 
from heathy hills of the rolled pebbles of the Thanet sands 
(B. E. C. Report, 1905, p. 167); but an examination of the material 
preserved under the name Potentilla Tormentilla Neck. (= P. sil- 
vestris) at the British Museum and Kew shows that the variety 1s 
of fairly general distribution in Britain. It may be distinguished 
—s 
ia) 
° 
B 
er 
we 
[a>] 
er 
amg 
ks 
fe) 
o 
J 
— 
er 
mM 
Z 
2 
ee 
— 
ie) 
pa 
S 
3 
m 
er 
bar] 
2S 
ee 
a>) 
= 
2 
o. 
—_ 
Er 
ef 
5 
@ 
nm 
et. 
E 
n 
mM 
= 
je) 
o 
i) 
n (Wolf). 
Cornish examples collected by sa nied inns acer by Dr. Wolf, 
the monographer of the genus.—A. D. JACKSON. 
this ahould “eA called a variety; to me it appears to be only a — 
state, which is common enough in such situations.—E. 8. 
the 
Mr. F. H. Davey and I take from Mr. A. Bennett to be 
chief features of ‘this variety, it.is impossible to accept this as 
Zimmeter’s var. sciaphila—C. C. VIGuRs. 
EPrmoBIuM LANCEOLATUM X ROSEUM: ; 
Rea Brook, Meole Brace, Shropshire, August, 1907. Concerning 
