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



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

 striata, argute serrata, margine 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 plantas tenuioris nati ; 

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

 rima, enei'via vel rarius quadam nervi umbra prsedita ; antheridia cir- 

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

 resque. Flores foeminei folio caulino longiores ; folia perich^tialia 

 circiter 17, erecta, externa minuta, rotundato-ovata, er.ervia, intima 

 oblonga, in acumen flexuosum, serratum et ad basin nonnunquam 

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

 ducto instructa ; archegonia parapliysibus numerosis stipata. Vagi- 

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

 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 saepe perforates, ciliis 2— 3-nis, baud 

 ferme fragilibus, interjectis, apice usque ad S fissa. 



Ab H. longirosiri quod proximum refert, statura dupio minori ; caule 

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

 angulum 45°-50° cum ramo efformanlibus (nee ut in H. striato fere 

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

 ristomio interno profundius fisso, ciliis validioribus, distinguitur. 



Ohs. Specimens gathered by Mr. -Wilson near Killarney have the 

 leaves sometimes more widely spreading, and therefore approach 

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

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

 which however differs 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. H. strigosum, Hoflfm. Y)Q\\i. Fl. 2. p. 76; M. P. 11. H.jml- 

 chellwm, Hedw. Sp. Muse. t. 68. 



Hub. TjqV. oee. ad terram in alpinis prope Cauterets [Mont 

 Lize; V. de Combascou). 



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

 Hat), 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 IMolir. 



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

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



