6 14 the botanical exchange club of the BRITISH ISLES. 
an endemic species. — G. Claridge Druce. “See ‘Journ. Eot./ 
1899, p. 524, and ‘Monograph of the Potamogetons of the British 
Isles,’ p. 31.” — W. R. L. 
Potamogeton , sp. No. 2278. Pond near Aberarth, Cardigan- 
shire, 23rd August 1899. ^ peculiar-looking plant, which I almost 
passed by as a submerged state of Jimcus supinus. Leaves three- 
nerved, gradually acuminate, patent or slightly recurved ; very slender ; 
brownish or yellowish-green when fresh. — E. S. Marshall. “ This, 
in some respects, resembles P. trichoides, but it is only a resemblance. 
I do not think there is any special name for this form of pusillus, 
Linn., but no definite idea has yet been evolved with regard to its 
varieties.” — A. Bennett. 
Scirpus Holoschccnus, Linn. Sandy shore of the Bristol Channel, 
N. Somerset, 2nd August 1899. Our little patch of this rare sedge 
appears to be more healthy and prolific than in 1898, when it suffered 
from autumnal gales. — J. W. White. “Excellent specimens; a 
valuable contribution to the Club.”^ — W. R. L. 
Carex muricata, Linn., \a.x. pseudo-divulsa, Syme. Under Cook’s 
Folly, Sneyd Park, Clifton, W. Gloucester, 24th June 1899. Many 
intermediates are to be found. Therefore this plant appears to me to 
do much better as a var. under muricata where placed by Syme, than 
as a distinct species of Schultz or Koch. — J. W. White. “For a full 
account of this see Marshall in ‘Journ. Bot..’ 1898, pp. 74-5. So far 
as this specimen goes it agrees with my specimens (assented to by 
Mr. Watson) and with specimens from Mr. Beeby from Sussex.” — A. 
Bennett. 
C. canescens, Linn., var. diibia, Bailey in ‘Bot. Gazette,’ No. 8 
(1884), p. 1 19. Above Glen Callater, S. Aberdeen, August 1899. 
plentiful in the boggy portions of the alpine table-land above Glen 
Callater extending into Forfarshire. This is probably the C. vitilis 
and C. alpicola of British botanists for the greater part. It has much 
resemblance to C. helvola^ but the Pfarrer G. Kiikenthal did not name 
as C. helvola any of the Clova tableland specimens. I found this 
variety also on Loch-na-gar, S. Aberdeen, and on Ben Lawers and 
Ben Heasgarnich in Mid Perth. — G. Claridge Druce. “ C. canescens, 
Linn., var. dubia, n. var., L H. Bailey in ‘Botanical Gazette,’ No. 8, 
p. 129, 1884= U. elongata, Olney, ‘Bot. King’s Rep.,’ p. 365, U. S. 
not Linn. ; Bailey ‘ Syn. N. Am. Carices,’ in ‘ Proc. Am. Acad. Arts 
and Sciences,’ p. 143, 1886. For Bailey’s description (as given by 
me) see ‘Ann. Scot. Nat. Hist.,’ 1899, pp. 187-8. See also Druce, 
‘Ann. Scot. Nat. Hist.,’ 1899, p. 12 1 for its record (detd. by Pf. 
Kiikenthal). Prof. Bailey’s idea of ‘ C, canescens, Linn. var. vulgaris, 
Bailey,’ as represented by specimens from him, is a much more slender 
plant in all respects than ours as represented by ‘Eng. Bot.,’ t. 1386 
(t. 1631, 3rd ed.) ; the leaves of his specimens are not one third as 
