590 THE BOTANICAL EXCHANGE CLUB OF THE BRITISH ISLES. 
distinct species. — E. S. Marshall. Mr. Marshall’s remarks on the 
different appearances assumed by dried Salicornias are very much 
to the point. Moquin-Tandon (in ‘ DC. Prodr.’ xiii. 2, p. 144), 
stated the matter thus : — “ Species in herbariis incompletae vel 
scrutatione perdifficili, iterum recognoscendie et in vivo exam- 
inandse.” — C. E. Moss. 
Polygonum Hydropiper, L., forma. Rufford, S. Lancs., v.-c. 
59, July 1909. A slender erect state, with single axillary flowers, 
which might be mistaken for P. mite, as the leaves are not at 
all undulate ; but the perianths and ochreae are densely glandular. — 
J. A. Wheldon. Too weak and undeveloped to base any con- 
clusion upon ; apparently a starved state of dried-up ditches. — 
Edward S. Marshall. 
Pumex conglomeraius x crispus. Ashstead Common, Surrey, 
August 28, 1910. — C. E. Britton. Yes, I think this is the 
hybrid, but the figure in ‘ Reichb. Ic. FI. Germ.’ xxv., t. 172, 
shows a plant in which the perianth segments are toothed ; 
in these they are nearly entire. Reichenbach’s plant is R. 
Schulzei, Haussknecht, but I think the Surrey plant must go 
under it. — G. Claridge Druce. Intermediate in habit and 
characters; apparently sterile. Doubtless right. — Edward S. 
Marshall. 
Rumex sylvestris, Wallr. Thames-side near Mortlake, Surrey, 
June 21, 1910. This dock appears of frequent occurrence by the 
Thames, where I have seen it at intervals between Putney and 
\Valton-on-Thames. In the ‘Journal of Botany,’ 1907, the Rev. 
E. F. Linton expresses the view that R. sylvestris, Wallr., from 
the riverside at Kew, is the hybrid R. conglomeratus X obttisifolius. 
I am not able to see the influence of R. conglomeratus in the 
specimens I label R. sylvestris, though I am inclined to think 
the hybrid in question grows near Putney. — C. E. Britton. The 
fruit and habit agree well with Hooker’s description. This is some- 
what unaccountably omitted under R. obttisifolius in ‘ Lond. Cat.’ 
ed. 10. — Edward S. Marshall. Yes, excellent specimens of 
the Surrey Thames-side plant, which has been suggested to be 
a hybrid, but although hybrid Docks are freely admitted by 
Dr. Beck von Mannagetta in ‘ Reichb. Ic. FI. Germ.’ vol. xxiv., 
he still retains this as R. obtusifolius, var. sylvestris, Koch, — the 
Lapathum silvestre, Lam., ‘FI. Fr.’ iii., 4, 1778. — G. Claridge 
Druce. 
Rumex limosus, Thuill. Old Brick-ponds, ist Mill Lane, 
Anlaby Road, Hull, E. Yorks., v.-c. 61, August 1903. — Charle.s 
Waterfall. Correct. — Edward S. Marshall. 
