REPORT FOR l88o. 
35 
of the petal ; but I have observed similar changes take place in a 
plant of ordinary trigranulatics from the Fife coast, which I have 
cultivated in the garden at Balmuto for some years. — J. T. Boswell. 
Polygonum aviculare , L., e. rurivagum. Roadside, Birstal Hill, 
Leicestershire, August, 1880. The five specimens marked * are all 
parts of one plant, too large to be preserved entire. It is much more 
diffuse and flaccid than typical rurivagum (which grew within a few 
feet of it), but has the long silvery ochreae, the acute ascending 
leaves, and the green and crimson perianth of that form. The plant 
is almost entirely barren, having only two flowers, and this may 
account for its abnormal habit ; but it is perhaps doubtful whether it 
should not be referred to agrestinum or vulgatum. — F. T. Mott. I 
think this is rurivagum , but evidently growing under some unusual 
circumstances. — J. T. Boswell. 
Euphorbia pseudo-cyparissias. Dry bank, Henfield, West Sussex, 
June, 1880. Abundant and thoroughly naturalized, but evidently an 
escape from the garden of the late Mr. Borrer. — W. H. Beeby. 
Salix fragilis , L. Pondside, near Hatfield, Herts, May and 
August, 1877. — H. Groves. This is the same as the male plant 
which I brought from Essex, many years ago. The female of S. 
fragilis has narrower leaves, with shallower serratures. — J. E. Leefe. 
Salix tria?idra , L., autumn flowering. Hort. Kew, August, 1880. 
J. G. Baker. From the leaves being broader above and a good deal 
rounded at the base, this may be S. amygdalina. — J. E. Leefe. 
Salix rubra , Huds. Thames side, near Putney, Surrey, March 
and October, 1878. — H. Groves. Leaves long, and generally broader 
than this, in the male plant ; but I should call it rubra. The filaments 
do not appear much connected. — J. E. Leefe. 
Salix Forbyana , Sm. Thames side, near Putney, Surrey, April 
and September, 1877. — H. Groves. Leaves rather long, and not as 
broad as usual towards the point ; but I think it Forbyana. Stigmas 
undivided. — J. E. Leefe. 
Salix Helix , L. ? Thames side, near Putney, Surrey, April and 
September, 1877. — H. and J. Groves. Not S. Helix of Smith, I 
think, which ought to have leaves attenuated and oblique at the 
base ; the leaves most resemble S. Woollgariana , but the catkins are 
not soft enough, and are most like forms of S. ramulosa , Borr., which 
perhaps the plant really is. S. ramulosa does not form a tree, but 
S. Woollgariana does. — J. E. Leefe. 
Salix Lapponum , c. pseudoglauca. Foot of Lochnagar, August, 
1879. — Collected by J. Lamont, for E. A. Lomax. Differs both 
from S. glauca , Sm., and from S. glauca , L. I am unacquainted with 
S. pseudo-glauca. — J. E. Leefe. 
Potamogeton ? From the Tweed and Teviot. I sent a 
number of specimens in 1876, labelled P. nilens (see Report for 
1876, p. 35), where it will be seen that Dr. Boswell considered them 
to be “very luxuriant specimens” of P. nitens. Dr. Trimen, in a 
footnote, Journal of Botany, viii., p. 289, referring to the same 
specimens, writes : “ It does not appear to me to be that species 
\nitens], but a large form of P. decipiens approaching P. prcelongus , 
probably P. salicifolius , Wolfg.” After seeing the above note, I 
wrote to Dr. Trimen, asking him to give it a name. His reply was : 
