Mr. R. Spruce on the Musci and Hepatica of the Pyrenees. 271 



libus implexis dense obtegens. In Alpibus Helveticis et Tyro- 

 lensibus viget, sec. eel. Schimper. 



Caulis procumbens, subdivisus, divislones irregulariter pinnatae vel 

 subbipinnatse, ramique crocei, subcurvati, dense foliosi et inter folia 

 radicibus pallidis, decompositis, planis, versus basin 2-4 cellulas latis, 

 obsessi. Folia imbricata, patentia, ovata, apiculata et acuminulata, 

 apice subtorta, concava, margine reflexa, argute et in parte superiori 

 subduplicato-serrata ; plicis tribus striseformibus, media nervum de- 

 bilem, ssepe ramosum, rarissime duplicem, supra medium evanescen- 

 tem involvente, instructa ; e cellulis minoribus areolata, lutescentia : 

 ramulina angustiora, plica media fere obliterata et ex eo nervo mani- 

 festiori. Flores etfructus desiderantur. 



Ab hoc difFert H. umbratum, Ehrh., divisionibus bipinnatis, ramulis 

 gracillimis ; radiculis compressis, latioribus, e 5-6 cellularum seriebus 

 confiatis ; foliis multo minoribus^ magis patulis, caulem ramulosque 

 hand velantibus, plerumque nervis binis instructis. 



Tab. I. 1. rami pars augm. ; 2. folium caulis \ 3. ramuli augm. ; 

 4. apex f alii augm. circiter 240e>5 ; 5. pars stuppa radiculosa inter' 

 foliaris pariter aucta. 



Obs. Although this comes so near H. umbratum in essential cha- 

 racter, it has yet a very different habit, arising from the less di- 

 vided stems and the much larger leaves, which are imbricated at such 

 an angle as not to allow the stem to appear between them. All the 

 states of H. brevirostre differ from it in the leaves being contracted 

 below the long acumen, and especially in their being prolonged at the 

 base into two semicircular free auricles, which are inflexed and em- 

 brace the stem * ; they are also usually squarrose and furnished with 

 two short nerves. H. plicatum, Schleich., is very similar in habit, 

 and has the leaves plicato-striate in the same manner, but the latter 

 are subsecund, with a longer nerve, their margins entire and most 

 widely reflexed at about two-thirds of their length. H. Kamounense, 

 Harv. (Hook. Icones, 1. 1. 24. f. 10), an Indian species, seems also to 

 approach it very closely, differing chiefly in the shorter, almost obso^ 

 lete nerve, the less sharply toothed margins of the leaves, and their 

 more twisted apices, often describing two spires. 



§ 3. Squarrosa. 



7. H. brevirostre, Ehrh. PI. Exsicc. n. 85 ; Schwgr. Suppl. 

 t.225;M.P.5. 



Hab. Zo_2 in umbrosis fere ubique, copiose fructiferum. 



8. H. triquetrum, L. Sp. PI. p. 1593 ; E. Bot. t. 1622 ; M. P. 7. 

 Hah. Zo_3 in sylvaticis. 



9. H. squarrosum, L. Sp. PI. p. 1593; Dill. t. 39. f.38. 

 Hab. Zo_3 in sylvis, pascuis, etc., rarissime fructificans. 



* This has not altogether escaped the notice of Schwaegrichen, who says 



of H. brevirostre, " folia cordato-ovata angulis baseos lateralibus 



inflexis." 



