Mr. R. Spruce on the Musci and Hepaticce of the Pyrenees. 285 



dato-triquetra (ramulorum cordato-ovata), longe acuminata, plicato- 

 striata, argute serrata, raargine utrinque ad basin reflexa superne 

 plana, nervo crasso paulo ultra medium desinente instructa, areola- 

 tione mediocri, amoene viridia v. fuscescentia, nitida. Florescentia 

 dioica. Flores masculi ad caulem et ramos planta; tenuioris nati ; 

 folia perigonialia sat numerosa, ovato-acuminata, concava, integer- 

 rima, enervia vel rarius quadam nervi umbra prsedita ; antheridia cir- 

 citer 20, brevi-pedicellata ; paraphyses illis numerosiores sublongio- 

 resque. Flores fceminei folio caulino longiores ; folia perichiBtialia 

 circiter 17, erecta, externa minuta, rotundato-ovata, enervia, intima 

 oblonga, in acumen flexuosum, serratum et ad basin nonnunquam 

 inciso-serratum subito attenuata, nervo rudimentario in acumen pro- 

 ducto instructa ; archegonia parapbysibus numerosis stipata. Vagi- 

 nula oblonga, teres. Pedicellus uncialis, aut paulo longior, Isevis, 

 siccitate dextrorsum contortus. Capsula ovali-oblonga, inclinato-sub- 

 cernua, badia. Operculum e basi convexo-conica rostratum, capsulse 

 longitudine. Peristomium : denies externi sedecim, subulato-acumi- 

 nati, linea media exarati : interius membrana pallidior, in processus 

 totidem carinatos et in carina ssepe perforates, ciliis 2— 3-nis, baud 

 ferme fragilibus, interjectis, apice usque ad f fissa. 



Ab H. longirostri quod proximum refert, statura duplo minori ; caule 

 prostrato ; foliis nitidis, longius acuminatis, minus conspicue striatis, 

 angulum 45*'-50<' cum ramo efformantihus (nee ut in H. striato fere 

 squarrosis) ; capsula breviori, nequaquam horizontaliter cernua, et pe- 

 ristomio interno profundius fisso, ciliis validioribus, distinguitur. 



Obs. Specimens gathered by Mr. Wilson near Killarney have the 

 leaves sometimes more w^idely spreading, and therefore approach 

 H. longirostre more nearly ; still the habit is the same as in my 

 Pyrensean plant, namely very nearly that of //. velutinoides, Bruch, 

 which however diiFers essentially from H. striatulum in the rough 

 pedicel and the form of its leaves. Mr. Mitten's specimens, gathered 

 in Sussex, about the roots of trees in a chalky soil, have much of the 

 external aspect of Isothecium myosuroides, 



80. jy.sifn^05Mm,Hoffm.Deut. Fl. 2. p. 76;M.P.ll. H.pul- 

 chellum, Hedw. Sp. Muse. t. 68. 



Hab. Z3 P. occ. ad terrain in alpinis prope Cautm'ets {Mont 

 Lize; V. de Combascou). 



■\H. circinatum, Brid. Mant. Muse. p. 165. 

 Hab. ad muros prope Burdigalam. Circa Vallem Clausam 

 (Arnott !). 



In all probability this species exists also in the Pyrenees, though 

 hitherto not observed there. 



Tribus 2. Isotheciace^. 

 2. Climacium, W. et Mohr. 



81. C. dendroides, L. Sp. PI. p. 1593 (sub Hypno) ; M. P. 90; 

 B. et S. Bryol. Eur. fasc. 16. 



