en Se 
REVUE BRYOLOGIQUE 
ParaïssanT Tous Les Deux Mois 
Les Manuscrits doivent être écrits en français, en latin ou en anglais. 
Sommaire du n° 4 
Weisia crispa © X W. microstoma o. NicHoLSON. — Une nouvelle forme 
du Orthotrichum cupulatum. MEYLAN. — Some new and rare Hepatics 
and Mosses from Yorkshire and Durham. INGHAM. — Bibliographie. 
CORBIÈRE, HUSNOT. — Nouvelles, ; 
Weisia crispa, Mitt. o X W. microstoma, C. M. co 
Scarcely were my notes on two forms of hybrid Weisia (Rev. 
- Bryol. 1905, p. 19) in print, when I discovered a few capsules of 
the hybrid W. crispa X W. microstoma, which I had hitherto 
looked for in vain. On searching in a field close to Lewes, where 
my recently described W. sterilis grows rather freely, 1 came 
across a small tuft of W. crispa, in which several of the capsules 
were much more conspicuous than the others and showed evident 
_signs of hybridization with another adjacent Weisia, which pro- 
_ved to be W. microstoma. 1 could see at first sight that there was 
_à noticeable difference between these capsules and those where 
W. crispata Ldb. had been the male parent, as the colouring was 
 duller and the smaller operculum dehisced less easily and subse- 
_quent examination quite confirmed the first impression, As in the 
case of the hybrid W. crispa X W. crispala, I discovered a single 
stem with a normal capsule of W. crispa and one of the hybrid 
“upon it, conclusively proving that it was not merely a form 0! 
W. microstoma with a short seta, such as occasionally occurs on 
our chalk hills. Prolonged search in this locality and in other 
here the two species grew together failed to reveal any mot 
hybrid capsules, but, as no doubt similar capsules may be found 
other localities, a short diagnosis may be useful : ne 
… Weisia crispa, Mit. © X W. microstoma, C. Mid 
The vegetative plant is that of W. crispa. The capsule is shortly 
. oval, dull brown when mature, from 1 to 1,12 mm. long with th 
operculum and 0,50 to 0,70 mm. broad on a short colourless set 
(1,55 to about 2 mm. long) which elevates it almost above the 
