REVUE BRYOLOGIQUE 
from C. fontinaloides. K differs from var. Aurostcus Thér. by the 
leaves, only half as large, the narrower nerve and smooth areo- 
lation. The resemblance to C. riparius is very close. — On stones 
_ in river, Gave de Pau, above Luz. 
… Scopelophila ligulata Spr. — In none of the descriplions of this 
moss which I have seen I found any reference to te considerable 
variation which it exhibits. Nearly all the books give the measure- 
ment of the stem as about 2-6 em... of the leaves 3-4 mm., without 
… indicating that any considerable degree Of variability exists in these 
_ latter; nor does Spruce in his interesting account of the plant (Journ. 
of Bot.,1881, p. 12) suggest anything of the kind. According to our. 
experience in the three localities in which we saw it, (Luchon; 
below Lac d'Oo; and Pierrefitte) it manifests a very marked 
degree of variation in the size of its parts, and especially in the 
Size, form and arrangement of the leaves. Thus at Pierrefitte 
1 gathered it in large lax tufts, fully 9 em. high, with the leaves” 
Joosely arranged, fully 4 mm.long and proportionately broad, 
In other cases, and notably in the case of some of the plants 
gathered below Lac d'Oo, the tufts were short, extremély dense, 
the leaves crowded, very small, 1-1 1/2 mm. long, very narrow 
and in fact linear; scarcely differing in size indeed, and by no 
means easy Lo distinguish from those of the Grimmia atrata 
with which it was associated. AE 
 Æncalypta rhabdocarpa var. pilifera N. et H. — Pic de Piméné, 
_Gavarnie. | 
_ Æ£. apophysata N. et H. Pic de Piméné, Gavarnie ; 2400 m. 
= Orthotrichum pallens Bruch. — Cirque de Gavarnie, on beech 
_Stump. 
… O. Rogeri var. defluens Vent. — Mons. Thériot inclines Lo refer 
à plant from beech near the entrance of the Pailla Valley, Gavar- 
nie, to this variety, which was at one time placed by Venturi 
under ©. stramineum, but subseqüently transferred by him 
O0. Rogeri. The principal objection to this conclusion is that the 
guard-cells of the stomata are bul little covered by the superficial 
cells, while O. stramineum (under which Limpricht still retains 
the variety) they are almost hidden. The stomata in O. Rogeri, 
however, show considerable variability in this respect, according 
0 Venturi, and it is perhaps scarcely necessary 10 go farther than 
this for a solution of the difficulty, The plant has some relation to 
O. Braun B etS., but that has small, almost immersed capsules 
While in the plant under consideration they are well emergent 
and indeed almost exserted, The determination must perhaps be 
_left somewhat uncertain. ie à ; dr. 
