BRISTOL BOTANY IN 1914. 
141 
Polygonum minus Huds. This rarity still continues at the 
spot on Catcott Moor where it was observed twenty years ago. 
Euphorbia Lathy ris L. As a sporadic alien the Caper Spurge 
has shown itself rather frequently of late. Mr. Ivor W. Evans 
noted at least 20 fine plants near the Sewage Disposal Works in 
Stoke Bishop Wood ; and he met with others on a railway bank 
near Keynsham and on a wall at Frenchay. 
Narcissus biflorus Curtis. We have a new locality in a 
meadow on the flats between Portbury Church and the Channel, 
where Miss Lucas came across five or six clumps. 
Lemna trisulca L. and L. minor L. These Duckweeds were 
not actually seen flowering in their native peat-moor ditches ; 
but some fronds were noticed by Mrs. Sandwith to be apparently 
in bud. These she secured and placed in a basin in a sunny 
window, carefully removing any small snails and water insects 
that might do damage by biting off the stamens when they 
projected, and was presently rewarded with a good crop of both 
species in flower. 
Juncus tenuis Willd. New to the district. Our attention has 
been directed by Mrs. Sandwith to a quantity of this interesting 
rush doing well along a riverside path by the Avon below Bristol. 
The standing of /. tenuis as a native British plant seems, to be 
insecure. In the London Catalogue it is treated as indigenous, 
but Druce and others regard it with suspicion. Apart from 
Don's Scottish records its history in Britain goes no farther back 
than thirty years or so, though during that period it has become 
known in a number of widely separated stations. That a plant 
so distinctly characterised should have been entirely overlooked 
in all these localities by former generations of botanists is incon- 
ceivable, and I have little doubt that good judges will agree that 
in most cases, if not in all, the plant has been introduced — 
probably from the United States to begin with, and then when 
well established in one or two centres its dispersal would not be 
difficult. In this Avonside instance local botanists are clear that 
the plant cannot have been present more than three or four years 
at the outside, and that being so the date of introduction might 
coincide with the erection of some fixed lights on metal stan- 
dards that have been placed at various points along the river- 
bank as aids to navigation. These standards with the lighting 
apparatus were imported from Belfast, and the supposition is 
that /. tenuis, which has grown for years in Belfast harbour, was 
included in the material used for packing, and in that way 
reached the spots where it is now established. 
Cyperus fuscus L. None has been seen for several years in 
the ditches where it was discovered, although searched for 
repeatedly. 
Car ex pallescens L. Not a very rare sedge, but is the subject 
of another acceptable confirmation of an old record. In 1885 
