230 Mr Evans, Notes on additions to the 
The most striking occurrence of the year has been the discovery 
of a considerable quantity of Prunella laciniata in a fallow at 
=e 
Hardwick by an undergraduate (Mr A. W. Graveson of King’s © 
College), followed by the further discovery by Mr Moss that it was 
accompanied by a still greater quantity of the putative hybrid” 
between it and P. vulgaris. This is new to the British Isles. 
The field furnished several other interesting plants, among others 
the radiate form of Centawrea nigra, found by the writer. The 
last-named was new to the county, as were Hpilobium roseum from 
the town of Cambridge (Mr Compton), Sparganiwm neglectum from 
Waterbeach (Mr Moss), and Anthoxanthum Puelliz from Gamlingay — 
(Mr J. E. Little). The wonderfully productive greensand at the 
village just mentioned was also responsible for Helianthemum 
Chamecistus subvar. viridis, and the rare Arnoseris pusilla was 
found there in abundance in the corner of a field, which had 
previously escaped investigation. Two uncommon forms of 
Orchids were met with at Dernford Fen by Mr Moss, Orchis 
maculata var. O'Kellyi, and Habenaria (Gymnadenia) Wahlen- 
bergi; while the Babington Herbarium proved to contain H. (G.)_ 
densiflora from the same place. These two forms of Habenaria 
are new to the British Isles. Juncus bufonius var. Jasciculatus 
was determined from Upware by Mr Adamson, who also found 
Quercus sessiliflora in Gamlingay Wood. 
We have ascertained that a green as well as a glaucous form 
of Stellaria Dilleniana (=S. glauca or palustris auct.) grows in 
Wicken Fen, but it is too early to state definitely how many of 
the phases of this variable species the county really possesses. 
Myosotis collina var. Mittenit from Chippenham and the hybrid 
Willows Sulia# alba x pentandra and S. cinerea x viminalis must 
further be placed to the credit of Mr Moss. 
Not one of our extinct plants has been rediscovered, but Ranun- 
culus parviflorus has been met with, after the lapse of many years, 
at Hardwick and Caldecot; Mr Moss has found Acorus Calamus 
at Upware; Mr Shrubbs Myosurus minimus near Ickleton and 
Muscart racemosum near Hinxton ; and the present writer a whole 
field of Thlaspi arvense near Pampisford, besides a quantity of 
Pedicularis sylvatica and new stations for Claytonia perfoliata 
and Malva moschata at Gamlingay. Both Lyciwm chinense and 
L. barbarum have been proved by Mr Moss to occur in the county ; 
the same may be said of Bartsta verna and B. serotina and several 
of Professor Lindman’s segregates of Polygonum aviculare, while 
various difficulties concerning the genus Arctium have been 
solved by the writer, who finds all the British forms in Cambridge- 
shire. Mr Adamson has named tentatively some of the Rose 
and Rubi, which will probably prove to be additions to our list. 
