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XXXIY. 
BOTANICAL OBSERVATIONS IN HERTFORDSHIRE DURING 
THE YEAR 1910. 
By E. J. Salisbury, B.Sc., F.L.S. 
Bead at Watford , 27th March , 1911. 
There have been very few records of plants found during the 
year, the only communications I have received being two, which 
have come, as is usually the case, from members of the Society 
who are workers in other directions—Mr. John Hopkinson and 
Mr. Charles Oldham. 
Two additions which have been made during the year to our 
list of phanerogamic plants have to be recorded; these are 
Quercus sessiliflora X Q. robur , a hybrid which is to be found 
in Symonds Hyde Woods, and Viola sylvestris var. JDruceana, 
Gregory, which occurs in considerable abundance in the woods 
around Harpenden. 
The following additional localities for plants which are already 
in our lists have also to be recorded. Their comparative 
frequency is indicated thus :— a, abundant; c, common ; /, 
frequent; ff, fairly frequent; loc, local; occ, occasional; r, rare; 
vr, very rare. 
Stellaria uliginosa. —Colney Heath (c). 
Hypericum humifusum. —Harpenden Common (/). 
Geranium pratense. —By road from St. Albans to Harpenden. 
Hr odium cicutarium.—^hid Lane, Harpenden (r). 
Bhamnus frangula. -^-Harpenden (occ). 
Lathrsea squamaria. —Pipers Lane, Harpenden. 
Potentilla argentea. —No Man’s Land, Sandridge (r). 
Saxifraga tridactylites. —Old wall near Chiltern Green Station. 
JEthusia cynapium. —Garden-weed, Harpenden. 
Conium maculatum. —Near Sandridge (loc) . 
Adoxa moschatellina. —Hedges, Harpenden (c). 
Galium tricorne. —Fields near Harpenden (occ). 
G. cruciata. —Between Redbourn and Harpenden (/). 
Bidens cernua. —Barton’s Pond, Harpenden. 
Brigeron acre. —Harpenden, where chalk comes to surface. 
Inula conyza. —Near Nash’s Farm, Sandridge. 
Monotropa hypopythis. —Hastoe Hill, Tring ; C. Oldham. 
Gentiana amarella. —Harpenden Common. 
Lysimachia nemorum. —Symonds Hyde, Sandridge (/). 
Mercurialis annua. —Allotments, Harpenden (or). 
Neottia nidus-avis. —Near Watford ; C. Oldham. 
For the following additions to our cryptogamic flora I am 
indebted to Mr. Hopkinson, by whom the material was collected 
in August from shallow sphagnous pools on Bricket Wood 
Common. The identifications were made by Mr. Gr. H. Wailes, 
F.L.S., and Prof. G. S. West, F.L.S. All are Algse. 
