478 Mr. R. Spruce on the Musci and Hepatice of the Pyrenees. | 
XLVIII.— The Musci and Hepatice of the Pyrenees. 
By Ricuarp Spruce. 
[Continued from p. 380. ] 
Tribus 20. Brucuiacea, C. Muell. 
44. Astomum, Hampe. 
256. A. nitidum, Hedw. Muse. Frond. 1. t. 34 (sub Phasco); 
Br. Europ. Phascum, p. 12. t. 6; M. P. 322. 
Hab. Z,_, P. c. in argillosis humidis secus viarum latera in 
valle 7rébons, rarissime! P. occ. circa Dax (Grateloup in FI. 
Frangaise). 
257. A. alternifolium, Brid. Mant. Muse. p. 10 (sub Pleuridio). 
Phascum altern., Br. Europ.! /. c. p. 15. t. 7 (non Dicks., nee 
Schwer.). 
“Var. 1, antheridiis in floribus cauligenis gemmiformibus ; 
etiam paraphysibus absque antheridiis (rarissime antheridiis non- 
nullis abortivis adjectis) in axillis foiorum superiorum dispositis ;” 
M. P. 323.—Hab. Z, in arenosis humidis cirea Jurangon. 
“ Var. 2, antheridiis absque paraphysibus in floribus gemmi- 
formibus, et insuper antheridiis paraphysatis numerosis (non- 
nunquam quinis) mm foliorum superiorum axillis ;”? M. P. 324.— 
Hab. Z,_, m arenosis circa St. Sever, Pau et B.-de-Bigorre.— 
“« Florescentia valde variabilis ; species distincta tamen a Ph. sub- 
ulato foliis perichetialibus videtur. Confer Br. Europ.;” M.P.lc. © 
The inflorescence of Phascum alternifolium and of several other 
mosses (e. g. certain Brya) is by no means so constant to the type 
assigned in ‘ Bryologia Europea’ as the authors of that work would 
lead one to suppose; and fully prepared as I am to acknowledge the 
importance of the characters derived from the inflorescence, it ap- 
pears to me that science will lose rather than gain if we shut our 
eyes to the aberrations which it undeniably presents. To assume a 
greater degree of invariableness in the inflorescence than exists in 
any other part of the plant, is as illogical as in practice it is found 
to be inaccurate. 
Tribus 21. SeLigERIACEs. 
(Seligeriacee et Campylosteliacea, Bryol. Europ.) 
45. Campylostelium, Bryol. Europ. 
258. C. saxicola, W. et M. Bot. T. p. 167 (sub Dicrano) ; Br. 
Europ. Campylost. p. 3. t. 1. 
Hab. Z, P. c. locis umbrosis in saxis arenaceis. Labassére. 
V. de Castelloubon. 
46. Brachyodus, Fiirnrohr. 
259. B. trichodes, Mohr, Crypt. Gew. p.85 (sub Gymnostomo) ; 
AEN GODT BRIAR IEEE SAT TENT Laci fe 
