44 Yorkshire Naturalists' Union : Annual Report, 1916. 



those designated ' vanishing ' ones, is pleasant to record, 

 especially as in some cases the growth is now luxuriant, or 

 even rampant, e.g., Lastrea Thelypteris, in the comparatively 

 recently discovered spot near Driffield. In a less degree, the 

 same may be said of Ranunculus Lingua Linn., Schcenus 

 nigricans, Linn, and Sparganium simplex, Huds. 



Mr. J. Holmes reports finding Andromeda polijolia in 

 flower on Ickornshaw Moor, v.c. 63, on May 27th. 



Mr. C. A. Cheetham writes : — Interesting papers have 

 appeared in The Naturalist during the year, amongst which 

 are : — 



' Wild Roses of Durham,' by J. W. H. Harrison. 



Yorkshire Hawkweeds,' by J. Cryer. 

 ' Lichen Flora of Harden Beck,' by T. Hebden. 

 ' Notes on Brefeldia,' by A. R. Sanderson ; and 



Plants of Commondale,' by J. G. Baker. 



Information has been readily given in reply to enquiries 

 as to the fruiting of the commoner trees and shrubs, and the 

 noticeable failure is that of the ash ; the rest, though varying 

 somewhat in different districts, seem to have had an average 

 crop, perhaps the roses might be put down as specially full 

 of fruit. 



Mr. Cockerline reports that the Leeds Cooperative of Field 

 Naturalists have been paying special attention to the alien 

 flora of their district and have been successful in adding several 

 species to the British list, which will be published later. In 

 view of the many different sources of grain that are being util- 

 ized at present, it would repay societies to keep a watch on 

 these alien plants and note any alterations. * 



Botanical Survey Committee. — Dr. T. W. Woodhead, 

 M.Sc, writes : — The work of the year has been very satisfactory 

 and the evening discussions at our Excursions have proved 

 both helpful and suggestive. The studies of Molinia, by the 

 Rev. T. A. Jefferies, have been continued, and an account of 

 the vegetative anatomy ot this plant was published in Vol. 

 15 (1916) of The New Phytologist. Further work by him on 

 Molinia-peat is making good progress. Interesting peat 

 problems were raised during the excursion to Austwick in 

 August, and at a joint meeting of Botanists and Geologists 

 held at Bradford in October, a very profitable discussion took 

 place on the features observed on the Ling-covered areas of 



Naturalist, 



