l6o THE BOTANICAL EXCHANGE CLUB OF THE BRITISH ISLES. 
Potamogeton flabellatus , Bab. Canal, Budbrook, Warwick, August, 
1886. — H. Bromwich. “ Correct.” — A. Bennett. 
Ruppia 7 'ostellata , Koch, var. nana, Bosw. Finstown, Kirkwall, 
Orkneys, nth August, 1886. — W. R Linton. 
Zannichellia brachystemon , J. Gay. Pond at the Woodloes, War- 
wick, Sept., 1886. — H. Bromwich. “ Probably correct ; but the 
fruit is larger than the usual form, and is towards Z. major, Boenning. of 
Reichenbach’s leones.” — A. Bennett. 
Juncus la??iprocarpus, Ehrh. Sandhills, Swansea, Glamorganshire, 
12th July, 1886. — W. R. Linton. J. nigritellus , Don. Sandhills, 
Llandudno Warren, July, 1886. — J. E. Griffith. “ Practically the 
same as several sandhill examples of J. la?nprocarpus which have 
been distributed through the Club in recent years. These forms 
usually bear a more obtuse capsule than the ordinary inland plant, but 
both are variable in this respect. I do not think that any of these 
is J. nigritellus Don, which (according to D. Don in Eng. Bot. Supp.) 
was referred by Laharpe to J. ustulatus Hoppe. I think that Don's 
plant merits examination by those who possess type specimens, in 
order to see whether indeed it be not a form of J. alpinus Vill.” — 
W. H. Beeby. 
Scirpus uniglumis, Link. Salt marsh, near Ollaberry, Northmadin, 
23rd July, 1886. I send a few examples from Shetland. — W. H. 
Beeby. By the Wick River, Caithness, 7th July, 1886. — F. J. 
Hanbury. 
Schce?ius nigricans , L., var. nana , Lange, Serpentine hills, Unst, 
Shetland, 26th July, 1 886. — W. H. Beeby. 
Carex curta , Good., var. alpicola , Wahl. Ben Lawers, Mid-Perth, 
19th August, 1886. — H. & J. Groves. Caenlochan, Forfar, July, 
1885. — H. E. Fox. “The plant so named in Britain; whether we 
have true vitilis , Fries, I much doubt, and Dr. Boswell expressed the 
same opinion in one of our Reports some years ago. The two plants 
are certainly not like my vitilis, Fr., from Sweden and Lapland. — 
Arthur Bennett. 
Carex trinervis, Degland. Wet ground, Ormesby, Norfolk, 
23rd August, 1886. On this the Editor of the Report for 
1884 observed : “It should be searched for on any of our sandy 
coasts, and once gathered cannot be passed over for anything else.” 
In company with Mr. F. J. Hanbury, who showed me the locality, I 
went after the Carex in August last, and found that with the growing 
plant, though it was in well-formed fruit (as members will see from 
my specimens), the nervation of the nut was most indistinct, and with 
the glass, and against the sunlight even, it was often hard to detect 
more than one nerve. So that in situ, it was not easy to distinguish 
C. trinervis from large C. vulgaris in the very point which forms the 
characteristic distinction. The chief assurance came from half- 
withered nuts, which shewed the three nerves plainly. And it is to 
be noticed that in the dried specimens the nerves have come out and 
need no microscope to see them. I would therefore say that, where 
trinervis might be suspected, it would be worth while collecting 
strongly-growing C. vulgaris , to observe it in the dried state. The 
fruit did not appear to ripen properly ; in many plants some had 
