Mr. R. Spruce on the Musci and Hepatica of the Pyrenees. 291 



Tribus 5. Pterogoniace^e. y 



9. Leptodon, Web., Tab. Syn. Muse. 



108. L. Smithii, Dicks. Ease. 2. p. 10. t.5. f. 4 {snh Hypno). 

 Hab. Zo_i in arborum cortice circa Pau, &c. In Pyr. orien- 



talibus (Arnott ! Montagne !). Circa Burdigalam, socia Cryphaa 

 heteromalla, legi. 



10. Pterogoniuniy Swartz. 



109. P.filiformey Hedw. Muse. Frond. 4. t. 7; M. P. 92. 

 Hah. Zi_3 ad saxa et arbores, circa Cauterets preecipue, fre- 



quens. 



" Var. foliis secundis. P. heteropteruniy Brid. ? Br. Univ. 2. 

 p. 176. Hab. in rupibus secus lacum Espingo prope B.-de-La- 

 chonfU.V.^^. 



110. P. gracile, L. Syst. Veg. p. 952 (sub Hypno) ; M. P. 94. 

 Pterigynandrum gr., Hedw. Muse. Frond. 4. t. 6. 



Hab. Zo_2 in saxis Pyrenseorum, semper sterile ; in arboribus 

 sylvse Lesperon prope Aq. Tarbellicas Agri Syrtici fructiferum 

 legi 20 Novembris, 1845. 



The leaves of this species, besides heing papiliose from the project- 

 ing cellules, are tuberculate on the back in the upper half; the tuber- 

 cles arranged with some regularity parallel to the sides of the leaf, 

 three or four cellules apart, and springing from the points where 

 four cellules meet. 



111. P.? suhenervium, Spruce; dioicum; c«M/e prostrate, vage 

 hipinnato, ramis ascendentibus, subparallelis ; foliis e basi patula 

 apice surrectis, ovatis oblongo-ovatisve, acuminatis, concavis, mar- 

 gine inferiori leviter reflexis, integerrimis, nervo rudimentario via: 

 ullo, areolatione guttulata. 



Hab. Z^ in arborum cortice prope B.-de-Bigorre et Pau : ? sola, 

 sterilis. 



Caules ^-\ unc, intricati, hie illic radiculos rufos emittentes. 

 Folia saturate viridia, integerrima, margine tamen inferiori e cellu- 

 larum parietibus prominulis subundulata ; nervo brevissimo, longi- 

 tudine latitudinem baud excedente ; siccando appressa, apice autem 

 recurva patulave : in ramis tenuioribus nonnunquam adsunt folia an- 

 gustiora, acumine cirrhoso chlorophyllo carente instructa. Cellula 

 discretse ; inferiores latitudine tertiam partem long, habent, supe- 

 riores vix dimidiam ; refiexus vero rotundatec, minores, unde folium 

 ibidem magis opacum videtur. Flores fceminei ad caulem et ramos pri- 

 maries nati ; folia perichcetialia, intimis minoribus subulatis exceptis, 

 ovato-lanceolata, acuminata, serrata, cellulis marginalibus curvatis, 

 enervia. Archegonia crassa, nuraerosa, 10 circiter, paraphysibus om- 

 nino destituta. 



Folia iis Pt. gracilis baud absimilia, epapillosa autem et apice aw- 



19* 



