LICHENES — BR JEAN MULLER. 351 



et juxta R. gracilcm, Nyl., post R. rigidam, Nyl., optime disponenda est. Apothecia, qua? 

 hucusque ignota, in ramillis terniinalia, 1-2 mm. lata, plana, demum convexa, subtus 

 lsevia, rnargo integer (subinde rosellus) et promitieus; discus albidu-pruinosus ; lamina ut 

 in genere mos est. Asci subangusti, 8-spori. Sporae 12-15 \i longse, 5|-6£ /x latae, 

 oblongo-ellipsoideee, rectse v. subinde obsolete curvulae. 



Eidem dein insuper adscribenda est Ramalina sorediantha, Kipbl. (Licb. Warm. p. 370, n. 19, 

 non Nyl. Eecogn. Ram.). Quod dein sub Bamalina erythrantha, Mull. Arg. (Lich. Nov. 

 Gran. n. 23), ipse descripsi non est nisi var. ejusdem late distributee s^ec\ei, =Ramalina 

 dendriscoides, Nyl. var. erythrantha, Mii.ll. Arg., minutula, densissime intricato-ramosa, 

 sorediis rubellis, cresceus in Nova Granata ad Cauitas alt. 1200 m. ; Andre n. 275 bis. 



Socotra. B.C.S. nn. 1360, 1365 pro parte, 1424. Ad ramulos Hyperici 

 supra Wacli Kisclien alt. 1000 m. et ibidem in Rhoide. Schweinf. 

 Distrib. Endemic. 



b. var. nodulosa, Mlill. Arg. in Proc. Roy. Soc. Edin. xi. (1882), 458. 



Lacinise circ. centimetrales, breviter ramulosae, suberectse, subirregulares et subtoruloso-nodulosae 

 et plus minusve albido-soredioso-tuberculatas. 



Socotra. Saxicola. B.C.S. nn. 1352, 1436, 1442 pro parte, 1443. 

 Distrib. Endemic. 



4. R. debilis, Mull. Arg. in Proc. Roy. Soc. Edin. xi. (1 884), 458. 



Thallus (unicus visus) 3£ cm. altus, lacinise in sectione anguloso-teretes, 1 mm. lata?, apice 

 angustatee, in feme parce ramosae v. simplices, inferne nonnibil trabeculis raris connexee, 

 tota longitudine sat crebre foveolato-impressse, acute angulosae, flaccidse, flavescenti-albidae, 

 infra apicem subulatum deflexum apotheciigerae. Spermogonia atra. Apothecia visa 

 2-3 mm. lata, caesio-pruinosa, dorso reticulato-rugosa, margine tenui integra. Sporae 14-16/u. 

 longae, 3J-4 fj, latae, graciliter fusiformes utrinque obtusiusculae, leviter lunatim curvatee. 



Proxime accedens ad R. testudinariam hurnilem, Mlill. Arg. sed flaccido-debilis, haud rigida, 

 magis albido-colorata. A R. Jiaccescente, Nyl., recedit laciniis haud compressis et habitu 

 non lineari-laciniato. 



Socotra. Egeling communicavit. 

 Distrib. Endemic. 



Tribe 5. Parmelie^e. 



Stictece and Parmeliece, Auct. 



This tribe comprises all foliaceous lichens, having rhizines, normal true 

 gonidia or gonimia (but not chroolepoid gonidia), and lacanoric apothecia. 

 Considerable differences exist between the genera in this tribe dependent upon 

 gonidial and gonimial characters, but such is the natural affinity between 

 Nephroma and Nephromium, and between Sticta and Stictina, that gonidial and 

 gonimial genera cannot be placed absolutely in different tribes. 



