214 GUERNSEY. 
LYCOPODIACEAE. 
Isoetes Hystrix, Dur. 
Native. First found: Wolsey, 1860. 
Rare. In damp sandy ground in various parts of Lancresse 
Common, particularly near Fort Doyle, and on the western side 
towards the Great Cromlech. Mr. Derrick has found it sparingly in 
the neighbourhood of Cobo, and also in a wet place near Petit Port, 
so that perhaps it is less rare than is commonly supposed. But it is 
a very inconspicuous plant, and extremely difficult to detect among 
the surrounding vegetation, until the eye becomes accustomed to it, 
for, when growing, it bears a striking resemblance to young plants 
of Armeria maritima or Carex arenaria, though these lack the 
spinous subterranean bulb which characterises Jsve¢es. Like Ophio- 
glossum lusitanicum, this interesting plant was added to the British 
Flora by George Wolsey, who discovered it ‘in damp spots on 
Lancresse Common in June 1860,’ as reported by him in the 
Phytologist, new series, vol. v. p. 45. Jsoetes Hystrix is not known 
to occur in Europe further north than Guernsey, and outside this 
island is not found again within fifty miles, its nearest known station 
being on the coast of the Cétes du Nord, and further south on the 
shores of the Bay of Biscay. In this respect it resembles Ofp/to- 
glossum lusitanicum; these two plants being unquestionably the most 
remarkable in the Sarnian flora. The reader will find an exhaustive 
paper by my friend, Dr. D. H. Scott, F.R.S.. on the structure and 
affinities of /soetes Hystrix, prepared from fresh specimens obtained 
on Lancresse Common, in Annals of Botany, vol. xiv. (1900), 
P- 413. 
(Lycopodium clavatum, L. This species is mentioned in 
Gosselin’s old list with the English name appended, Common Club 
Moss or Wolf’s Claw. It is a plant little likely to be confounded 
with any other growing in this island, and, as it is widely distributed 
throughout Normandy and not uncommon in the part nearest these 
islands, it is quite possible that it existed here in Gosselin’s time. 
But as, unfortunately, there is no specimen of the plant in his 
herbarium (which, however, is very incomplete), nor any subsequent 
evidence of its occurrence, I am reluctantly compelled to class this 
among uncertain records.) 
