KXTnnmoN Ar.RRTiN(i, 19‘)2 
UMO^ELLA ^ITBVTATA in Wales 
A new locality for L. fmbulata Ives in Wales, on the River Dysynni. 
near Towyn, in v.-c. 48 (Merioneth), was discovered in May 1952. 
The plant had pi'evionsly been recorded from v.-c 41 (Glamorgan) 
(1 stations), and from the west and east banks of the River Glaslyn 
in v.-c. 49 (Caernarvon) and v.-c. 48 iMerionetli). The Dysynni plan+« 
were in flower and fruit from May to October 1952, and submerged 
plants were gathered in fruit in November. 
The exhibit included live fruiting specimens of L. suhulata, a map 
showing the distribution of the plant along the lower reaches of the 
River Dysynni at Rhyd-y-Garnedd, and herbarium specimens of L. 
aquattca L., 7). SKhukita and L. uquafica x suhulafa. 
Miss O. M. Goodman. 
GALIUM rUMIWM IN Britain 
Sterner’s recent work on the segregates of G. pumilum Murr. in 
north-west Europe was summarized, and herbarium sheets of the two 
forms found in this country, ssp. vulgatum (Gaudin) Schinz & Thell. 
and ssp. aepfenti'wndlc Sterner, were exhibited. A map of their known 
distribution in this country was also shown. 
A sheet of G. pumilum ssp. vulgatum which had been distributed 
through the B.E.C. as G. erectum Huds. was exhibited and the differ- 
ences between the two species were demonstrated. 
K. M. Good WAY. 
SALIX CINEBEA and S. ATRO-CINEEEA in the Cambridge District 
A brief study of the characters supposed to distinguish between the 
species S. atro-cinerea Brot. and S. cinerea L. 
The exhibit consisted of a short discussion of the problem illustrated 
by the following: — 
A table listing the characters concerned for 21 fresh specimens and 
17 herbarium specimens, comparable parts of the plant being taken in 
each case. This showed no apparent eorrelation between the definite 
rust-coloured leaf-hair character and any of the others. 
A statistical analysis of length-breadth ratios of comparable leaves 
for each specimen. This indicated that the specimens fell broadly into 
two populations with regard to this character, one of specimens with- 
out rust-coloured leaf-hairs and a mean leaf length-breadth ratio of 2.2, 
the other of specimens with a few to many rust-coloured leaf-hairs and 
a mean leaf length-breadth ratio of 2.7. 
A map showing the places from which the specimens were collected. 
This gave no evidence for a zonal distribution of the two “species”. 
Suggestions were made for the amplification of the study on various 
lines. 
D. E. Greenwood. 
