344 40. USNEACEAE [ 159. Ramalina 



G. Membranaceous 



H. Lobes reticulate 5. R. Duriaei 



H. Lobes never reticulate 



I. Laciniae lanceolate 14. R. yemensis 



I. Laciniae never lanceolate 15. R. Menziesii 



E. Laciniae never expanded 



F. Medulla with adglutinated hyphae 

 G. Laciniae terete 



H. Apothecia terminal 4. R. combeoides 



H. Apothecia lateral 3. R. ceruchis 



G. Laciniae bifacial 1. R. homalea 



F. Medulla without adglutinated hyphae 

 G. Sorediate or soraliate 

 H. Sorediate 



I. Branches longitudinally rugose . . . 7. R. polymorpha 

 I. Branches not longitudinally rugose . . 8. R. pollinaria 



H. Soraliate 9. R. farinacea 



G. Not sorediate or soraliate 

 H. Branches canaliculate 



I. Laciniae open-canaliculate . . . 12. R. canaliculata 



I. Laciniae connivo-canaliculate .... 17. R. linearis 

 H. Branches not canaliculate 

 I. Papillate 



J. Terete, torulose 



K. Spores ellipsoid 19. R. Willeyi 



K. Spores fusiform 24. R. Montagnei 



J. Compressed 18. R. complanata 



I. Not papillate 



J. Calcareous 6. R. calicaris 



J. Coriaceous 



K. Spores ellipsoid 



L. Branches laciniate, apothecia 



scattered 10. R. fastigiata 



L. Branches wide, apothecia 



lateral 11. R. subamplicata 



K. Spores fusiform 25. R. stenospora 



D. Thallus pendulous 26. R. usneoides 



1. Ramalina homalea Ach., Lich. Univ. 598. 1810. 



Thallus rigid, greenish gray to straw-colored, becoming reddish when dried, the 

 lobes flattened, two-edged, smooth, or chinky and wrinkled, moderately dichoto- 

 mously branched, or digitate toward the ends, the tips cylindrical, tapering; 

 apothecia small to large, 2-8 mm. across, lateral, the disk concave to flat, the 

 exciple finally wavy to torn-lobate; spores oblong-ellipsoid, straight or rarely 

 slightly curved, 11-18 X 3-5 p. 



On maritime rocks and possibly on trees, California. 



2. Ramalina testudinaria Nyl., Bull. Soc. Linn. Norm. II. 4:108. 1870. 

 R. testudinaria var. intermedia Mull. Arg. 



Thallus rigid, greenish to reddish, the lobes short, flattened, sometimes ex- 

 panded, smooth to cracked or wrinkled, or sometimes obscurely pitted, rarely 

 dichotomously branched, the tips blunt; apothecia middle-sized to large, 5-10 mm. 

 across, commonly subterminal, often clustered, the disk concave to flat, flesh-colored 

 to reddish, the exciple becoming torn; spores oblong-ellipsoid, straight to slightly 

 curved, 10-20 X 3-5 p. 



On maritime rocks, southern California. 



3. Ramalina ceruchis (Ach.) De Not., Giorn. Bot. Ital. 2:218. 1846. 

 Parmelia ceruchis Ach., Meth. Lich. 260. 1803. R. ceruchis var. tumidula (Tayl.) 



Nyl. R. testudinaria var. humilis Mull. Arg. R. ceruchis f. cephalata Tuck. 



Thallus rather rigid, greenish gray to straw-colored or reddish, the lobes smooth 



to deeply pitted or wrinkled, sparsely black-spotted, subcylindrical, unbranched or 



sparingly branched dichotomously, sometimes bearing gray, capitate soredia; 



