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



Tribus 5. Pterogoniace.e. 

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



108. L. Smithii, Dicks. Fasc. 3. p. 10. t. 5. f. 4 {suh Hypno). 

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



talibus (Arnott ! Montague !). Circa Burdigalam, socia Cryphcea 

 heteromalla, legi. 



10. Ptei'ogonium, Swartz. 



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

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



quens. 



" Var. foliis secundis. P. heteropterum, Brid. ? Br. Univ. 2. 

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

 chonf M.P. 93. 



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

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



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

 sylvfe Lesperon prope Aq. Tarbellicas Agri Syrtici fructiferum 

 legi 20 Novembris, 1845. 



The leaves of this species, besides being papillose 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.? subenervium, Spruce; dioicum; ca^/e prostrate, vage 

 bipinnato, ramis ascendentibus, subparallelis ; foliis e basi patula 

 apice surrectis, ovatis ohlongo-ovatisve, acuminatis, concavis, ma?'- 

 gine inferiori leviter refieocis, integerrimis, nervo rudimentario vix 

 ullo, areolatione guttulata. 



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

 sterilis. 



Caules ^-1 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 rarais tenuioribus nonnunquam adsunt folia an- 

 gustiora, acumine cirrhoso chlorophyllo carente instructa. Cellulce 

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

 riores vix dimidiam ; reflexus vero rotundatcc, minores, unde folium 

 ibidem magis opacum videtur. Floresfoeminei ad caulem et ramos pri- 

 maries nati ; folia perichcetialia, intimis minoribus subulatis exceptis, 

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

 enervia. Archegonia crussa, nuraerosa, \0 cvcciter, paraphysibus om- 

 nino destituta. 



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



19* 



