Mr Evans, Additions to the Flora of Cambridgeshire 229 
Notes on additions to the Flora of Cambridgeshire. By A. H. 
Evans, M.A., Clare College. 
[Read 28 April 1913.] 
THE publication last year in our Proceedings (Vol. XVI., Pt. 111.) 
of my “Short Flora of Cambridgeshire” has resulted, according 
to expectation, in a further revival of the interest now taken in 
Field Botany, and in considerable accessions to the county list. 
We are naturally much indebted to our senior botanists, several 
of whom are specializing in various divisions of the Cryptogams, 
but we feel that even more stress should be laid on the co-operation 
of the undergraduate members of the University, who have much 
time at their disposal in which to range the country, and keep 
submitting to us specimens of the plants with which they meet, 
so that it becomes possible to determine the exact forms, and 
settle whether they are new to Cambridgeshire or to any of its 
districts. ‘The excursions under the guidance of Mr Moss come 
in the same category, while, extending as they do beyond the 
county limits, they enable us to institute comparisons between 
our Flora and that of the immediate neighbourhood, as well as to 
familiarize our students with rare plants that might not otherwise 
come under their notice. The extreme north of the county, 
however, 1s still in need of careful exploration. 
Species which had been lost to sight have been rediscovered, 
and several that are new to our area met with, though, as will be 
seen from the subjoined list, new varieties are no less common 
than new species. It is most important to decide which of the 
varieties recognised on the Continent are also to be found in 
England, and we have been able to contribute to this desirable 
result, chiefly through the penetration of Mr Moss, who will 
incorporate the information in his forthcoming British Flora. 
The genera Arctiwm, Lycium and Bartsia, as well as the 
ageregate Polygonum aviculare, have been entirely reconsidered 
in the light of recently published work, while several of the Latin 
names in the catalogue below have been corrected. As regards 
the Cryptogams we have been able to add somewhat to the lists 
furnished by our former coadjutors. Mr R. S. Adamson has 
sent a large number of notes on the Musci, in addition to remarks 
on the Phanerogams, and Mr Compton has given us the results 
of his year’s work on the Hepatice. Mr F. T. Brooks is still 
studying the Fungi, but wishes to delay the publication of his 
results until he has examined further material. 
