WEISIA STERILIS 247 
illa verna Huds. The seed-vessels of this plant were very 
conspicuous, scattered thickly all over the cliffs along the coast, 
— Solva to St. David’s Head, and to the rocky top of Carn 
ytie. 
Potamogeton varians Morong. In a brook on the Great Moor. 
Mr. Arthur Bennett sends me the following note on this plant :— 
“The Baieocantett proves, on examination, to be of much interest, 
and to a with Mr. Fryer’s specimens of P. varians Moron ng ex 
Fryer in Fourkal of Botany, 1889, p. 88, t. 287 = P. spatheformis 
Tuck, ex pote in Gray’s Man. Bot. N. U. S. ed. 5, p. 487 (1878). 
It is recorded only from Cambridgeshire in Britain, and Medfor 
Mass., United Staves, North America, where it was discovered by 
Prof. Tuckerman in 1850. ‘Mr. Fryer is inclined to regard a 
species as a hybrid between heterophylius and angustifolius [= Fryi 
But a weighty argument against this view is the fact that salties 
of the supposed parents occurs in Mysti stic Pond, Medford’ (Morong, 
m. Naiadacee, p. 1893).’ 
"Cares  pulicaris L.—C. Goodenowi J. Gay.—C. flacea Schreb.— 
C. binervis Sm.—C, CE deri Retz 
Phalavis arundinacea Li. Vivip aro 
Arrhenatherum avenaceum var. nodosum Reichb. — Sieglingia de- 
cumbens Bernh.—Molinia varia Schra 
Asplenium Adiantum- -nigrum var. nk Kit. & Milde. A well- 
marked plant, growing in walls about St. David’s.—A. marinum L. 
In sea-caves and in clefts of rocks on St. David’s Head.— Equisetum 
limosum var. fluviatile L. Great Moor. 
WEISIA STERILIS, sp. n. 
By W. E. Nicuonson. 
For some time past I have been greatly puzzled 7 a small 
species of Weisia belonging to the Systegium group, which h I have 
met with in bee parts of the chalk downs in Sussex, and which 
was sent ties a sterile state from Folkestone by . 
lant i is rather tall and lax in habit, with the ordinary 
way 
not until the discovery of the true W. multicapsularis in 
Dacumbels” 1901, that I became aware of my mistake. Unlike the 
other members of this group, the plant in question is more fre- 
this condition, especially in a dry 
C. 
quentl. growing intermixed with 
pomad plant appears to be very sonsiaxit in its characters, and I 
