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. Schiraper. 



Caulis procumbens, subdivisus, divisiones irregulariter pinnatse vel 

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

 radicibus palHdis, 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 superior! 

 subduplicato-serrata ; pHcis tribus stria^formibus, media nervum de- 

 bilem, s?epe ramosum, rarissime dupHcem, supra medium evanescen- 

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

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

 festiori. Flores etfructus desiderantur. 



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

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

 conflatis ; foliis miilto minoribus, mugis pattilis, caulem ramulosque 

 haud velaniibus, plerumque nervis binis instructis. 



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

 4. apex folii augm. circiter '2A0ies ; 5. pars stuppce radiculoscB inter- 

 foliar is par iter aiicta. 



Obs. Altbough 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 allovv^ the stem to appear between them. All the 

 states of H. brevirostre differ from it in tlie 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 refiexed at about two-thirds of their length. H. Kamounense, 

 Harv. (Hook. Icones, 1. t. 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 ; Scliwgr. Suppl. 

 t. 225;M. P. 5. 



Hah. Zo-2 in umbrosis fere ubique, copiose fructiferum. 



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

 Hab. 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 Schvvaegrichen, who says 



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



inflexis." 



