EXHIBITION MEETINGj 1949 
57 
I have known this plant at Westwood Pool since 1939, but 
inanj^ years before this the Worcestershire botanists recognised 
that this plant was distinct. The first record appeared in the 
Transactions of the Worcestershire Naturalists Club, 1920, 
when, during a half day walk of the club to visit Elatine Hydro- 
piper at Westwood Pool the following note was made : Alismu 
la nceolatuvi (the narrow-leaved Water Plantain) is here the 
dominant .species and flourishes almost to the exclusion of the 
common form ! Later on the Worcs. Trans, record Alisrna Plan- 
tago-aquatica var. grarninifolium. I feel sure they were de- 
scribing the same plant, which they had seen on previous visits. 
I have been unable to find either Alisma Planta,go-aquatica 
or Alisma lanceoUitvm. round the pool. 
The pool is frequented by migrant ducks and water fowl and . 
I suggest that its* mode of introduction is by this means. 
Elatine Ilydropiper, and Pumex maritimiis^ which is occa- 
sional, both have probably been brought by similar means. 
Nearby is the saline canal from Droitwich which contains 
many salt marsh jilants, a notable new arrival has been Spartina 
Tomnsendii. 
An unidentified Scirpus cultivated in a warm greenhouse at Kew 
and various Carex hybrids, by E. Nelmes. 
Poa annua L., P. supina Schrad. and hybrid, by C. D. Pigott. 
Poa supina (2n-14), a plant of upland and alpine regions, differs 
from the common Poa annua (2n-28) in its perennial creeping 
rhizome, its early flowering, the greater length of its anthers 
and the shape and arrangement of its flowers. Specimens from 
Scotland were exhibited showing these morphological differ- 
ences, but to confirm the presence of this species in the British 
Isles a cytological investigation is also required. A sterile 
triploid hj^brid is reported from Scandinavia. 
Specimens of Milium scahrum Merlet, Nardumis maritimus (L.) 
Janchen and Nicandra Physaloides Gaertn., by Prof. T. G. 
Tutin. 
A sheet of Milium scab rum from the north coast of Guernsey 
was exhibited. It was rediscovered here in April 1949, fifty 
years after its original discovery by Andrews, and is locally 
abundant though very inconspicuous. 
Nardurus maritimus was shown from Bloody Oaks quarry, 
Rutland, where it was found by Mr E. K. Horwood. The quarry 
is situated among fields at some distance from roads or houses 
and lias long been disused. It is hard to see how this grass can 
have been introduced here. 
Nicandra Physaloides has persisted, at least for some years, 
on a piece of waste ground by a school in Leicester. It is in- 
teresting to note that the following remark occurs under this 
species in “ Manual Flora. of Madeira ” by R. T. Lowe: “ In 
