489 
under 2 mm. long x 1 J mm. broad, ovate and tapering with 
a slight shoulder, brown, and falls short of perianth. In Mr. 
Wallace’s plants we find the nuts almost black, circa 2\ mm. 
long x 2 mm. broad. Taking into account also the look of 
sterility, few really ripe nuts formed, one cannot help coming 
to the conclusion that his plants are probably P. nodosum 
X lapathifolium, leaning towards the first named. As the 
perianths and peduncles are glandular, etc., I see no signs of 
Persicaria in the specimens. — C. E. Salmon. This is P. 
nodosum Persoon f. incanum Asch. (f. salicifolium of Camb. 
Brit. FI. ; P. incanum Willd. ; P. salicifolium Gray, etc., etc.). 
The nomenclature is involved, but the plant is clear enough. 
— E. Drabble. P. nodosum Pers.- — I. M. Roper. Is not this 
P. nodosum Pers. and not a hybrid, which would show more 
infertility ? — A. H. Wolley-Dod. 
Alnus glutinosa Gaertn., f. microcarpa (Fedde) et f. micro- 
phylla (Uechtr.). Wallington Park, W. Norfolk, Sept. 23, 
1927. — J. E. Little. 
Salix triandra Linn, var concolor Anderss. f. latifolia Anderss. 
Near Egham, Surrey, catkins April 10, 1927 ; leaves July 29, 
1928. The specimens were collected from a very old bush in a 
hedge, and the leaves are not nearly so large or broad as they can 
be, but they are mostly rounded at the base and not tapered 
nor cuneate at the base as in the type. They are green on 
both sides, as implied by Andersson’s varietal name concolor. 
I have seven varieties of the species, $ and $ of each, all 
occurring in Surrey. — J. Fraser. 
Salix fragilis Linn. [Ref. Z 31]. Wandle Bank, Mitcham, 
Surrey. Flowers April 6, 1928, leaves and fruit May 10, 
1927. The now discarded var. britannica F. B. White E. F. 
Linton considers a barren state of the type [British Willows, 
p. 14), and Mr. Fraser says “ there is little if anything ” in it 
(Intro, to 11th edition London Catalogue, p. 3). — J. E. Lousley. 
Quite correct. It has the irregular serration of the leaves. 
The ovaries are subulate, gradually narrowed to the short 
style. I have only seen five male trees in the south-east of 
Surrey and they have all been destroyed by the building of 
houses and bungalows. That would account for the barren 
condition of the fruit and the slender ovaries. — J. Fraser. 
Salix alba var. vitellina (L.) [741]. Putteridge Park, 
Herts., ap. 18, July 9, 1928. — Coll. M. Brown, Comm. J. E. 
Little. I agree. The specimens seem to have been gathered 
