GENERUM ClVYrTOGAMlCOHUM. 697 



flexo. Thallus plerumqiie foliaceus, interdum cru- 

 utaceus. Sp. 1453 — 1465. 



500. Stereocauloiv Schreb. Apothecia hemi- 

 sphaerica, podetiis solidis fruliculosis. Lamina 

 proligera carneo-cornea, margine destituta, sub- 

 stantia thallode substrata. Sp. 1466, 1467. 



501. Parmelia Ach, Apothecia scutellata (di- 

 sciformia), margine thallode cincta. Thallus va- 

 rius, sed ubique e binis stratis compositus. 



Subgenus I. Us:vex Dillen. Thallus fi-uticulosus. 

 Apothecia disciformia, submarginata. Sp. 

 1468. 



II. Alectoria Jch. Thalhis pendulus, ramo- 

 sissimus, filamentosus, ramis teretiusculis 

 fistulosis. Apothecia thallodea, minuta , si- 

 milaria, submarginata. Soredia lateralia, 

 verrucosa, albida. Sp. 1469. 



III. Eyernia ylch. Thallus cartilagineo-folia- 

 ceus, compressus, ramosus, erectus vel pen- 

 dulus. Apothecia adnata, concava, margi- 

 ne thallode cincta. Soredia pulverulento- 

 pulvinata, sparsa. Sp. 1470, 1471. 



IV. Ramali.va ^ch. Thallus cartilagineus, ra- 

 moso - laciniatus, compressus. Apothecia 

 crassiuscula, subpeltata, submarginata, thal- 

 lo concolora. Soredia farinacea» copiosa. 

 Sp. 1472. 



V. Cetraria Ach. Thallus cartilagineus , fru- 

 ticulosus aut decumbens, submembranaceus, 

 foliaceus. Apothecia pellata, oblique affixa, 

 marginata. Sp. 1473 — 1477. 



