Es, 
REVUE BRYOLOGIQUE 25 
ginibus plus minusve late reflexis vel recurvis . Costa unica,angusta, 
longe ab apice soluta, in sectione homogenea, 3-6 cellulas (Duces) è 
subæquales quarum 2 ventrales, 3-4 posteriores paullo minores, 
_exhibens. Areolatio valde laxa et pellucida ; cellulæ plus minusve 
= regulariter hexagono-oblongæ, 25-35 p longæ, 10-18 & latæ, basin à 
ae versus longiores, elongato-oblongæ, ad apicem paullo minores 
cr brevioresque, minus regulares, mediis tamen similes fere, omnes 
perpellucidæ, parce chlorophyllosæ, parielibus tenuissimis ; ad 
marginem 1-2 seriatæ, lineares, limbum perangustum integerri- 
mum toto ambitu formantes. Propagula filamentosa, stricla, 
articulata, singula vel plura e costæ dorso nonnunquam crescunt. 
_Dioicum. Planta mascula sola nota; flores maseuli numerosi in 
foliorum axillis medium versus caulem conditi, parvi ; folia de. 
perigonialia late ovato-acuminata, limbata, enervia; antheridia 
2-3, 450-180 y longa, paraphysibus tenuissimis interjectis. 
Hab. — Creeping on other mosses upon dripping rocks in 
ravine, alt. 700 m.; Zinkenbach, St. Wolfgang See, Salzburg, 
Austria ; Aug. 3, 1908 ; leg. H. N. Dixon and W. E. Nicholson. 
Type in herb. H. N. Dixon ; co-type spocimens in herb. W. E. 
Nicholson, and in the National Collections at Kew and the British 
Museum. à Fe 
D. carinatum differs from almost all species of Distichophyllum 
in the characters pointed out above. D. flaccidum (Hook. f. and 
Wils.) has the leaves quite obtuse, and the areolation while 
approaching that of our plant is smaller above and with firmer 
cell walls : the cell structure in D. imbricatum Mitt. and D. nigri- 
cans Besch. is still more remote, and the habit and colour enti- 
rely distinct. D. cavifolium Card. (Flore bryologique des Terres 
_ magellaniques, de la Géorgie du Sud et de l'Antarctide, 4908) most 
_nearly resembles it, but is a larger plant of quite different tex- 
ture, the cells firmer and shorter, nerve narrower, etc., and the 
leaves while concave and to some extent carinate are not nearly 
so marked in this respect, and have not the margins strongly 
reflexed above, which gives s0 characteristic an appearance to the 
leaves of our plant especially when viewed laterally (cf, Fig. 4), 
an appearance which is characteristic too of certain species 
among other exotic genera, such as Pterobryopsis. D he 
The filamentous propagula are not at all constantly produced, 
_ and are liable to be confused with the threads of a filamentous 
alga with which the plant was in some instances overrun. They 
__ oceur most frequently at the apex, but sometimes at the base of 
_the nerve. ee | ie 
© The texture is remarkably soft, and is probably not equalled in 
. that respect by any other European moss. A 
