EXHIBITION MEETING, 1952 
length / number of teeth on tlie leaf, and corolla length /calyx length) 
were shown. O 11 I 3 ' those specimens with ‘typical’ tctiuhit or bifida 
flowers were plotted, in an attempt to exclude possible hybrids, but 
even so no clear separation has so far been found. 
It is hoped to continue this study, and to include an examination 
of continental material of the two species. 
Miss S. Litteeboy. 
A Hybrid UUMEX New to Euroi’e 
Specimens of R. conglomeratus x vurivifolius collected by Dr. F. 11. 
J'llliston Wright at Braunton Burrows, N. Devon, v.-c. 4, on August 4 
and 25 1952, were exhibited. Living material grown from a scrap 
of the rhizome of the same gathering was also shown. 
Maps showing the distribution of 11. cuneifolius Campd. as a native 
in S. America, and as an alien in N. America, Europe and the British 
Isles, were also displayed. The hybrid is probably also new to science 
and an account is being prepared for Watsoiua. 
J. E. Lousley. 
Hybrids of the British ELYTIUGIA 
The British species of Ehjtvigia (Agropyron repens group) are E. 
junceiformis A. & D. Love, E. pungens (Pers.) Tutin and E. repens (L.) 
Nevski (c/. Tutin, Watsuiiia , 2, 186-187). Specimens of hybrids between 
these species, as well as tables and illustrations showing the most im- 
portant characters for their identification, were exhibited. 
Such hybrids arise frequently when the parent species grow in close 
proximity. They are characterized by high sterility, having narrow, 
indehiscent anthers with angular, shrivelled pollen-grains, which are 
transparent, lacking plasma. These hybrids are usually intermediate 
in their characters between the parents. 
E. junceiformis X pungens and E. junceiformis x repens differ from 
E. pungens x repens in having a somewhat fragile rhachis with smooth 
or nearly smooth margins, and obtuse or apiculate glumes. In E. 
pungens x repens the rhachis is tough, having ciliate margins, and 
the glumes are acute. 
The character i.stic features of E. junceiformis X pungens are the 
following : the margins of the sheaths often ciliate, prominently nerved 
leaves with very short hairs on the nerves, and the rhachis always 
glabrous. This hybrid occurs more frequently on sea-shores of the 
southern part of Britain. E. junceiformis x repens differs from E. jun- 
ceiformis X pungens in having the margins of the sheaths always glab- 
rous, less prominently nerved leaves with longer hairs on the nerves, 
and the rhachis sometimes hairy. The records known at present indicate 
that this hybrid is much commoner in the northern part of the British 
Isles. 
A. Meloeris. 
