0^8 C. SKOTTSBERG 



Lecanora atra Rhizocarpon mtcrospermum 

 >> coarctata » obsairaium 



Lecidea cyanosarca Usnea florida 



Massalongia carnosa Lichens on earth 



Pnrvielia abstrusa 



cetrata Placopsis fuscidula, very abundant 



conspersa Pseudocyphellaria Freycinetii 



pUosella var. " Si^^'^ 



» revoluta Sphaerophorus mclanocarpus 



Pertusaria hadrocarpa On dead mosses 



Psorotna viilca7iicuni . . 



loniJita btdlata 



The Grass-lmid of the Basal region. 



Along the east side of the island and on the talus slopes at the foot of the 

 high west barranca Stipa laevissima and neesiana put their stamp on the scenery; 

 the country looks like a dry steppe, yellow during the summer and probably not 

 much greener at other seasons, because the new blades do not make themselves 

 very conspicuous in the dense tussock of the dead ones. PI. ii6:i. A few 

 other native species may occur in this community, and some weeds are rarely 

 absent. 



86. (14 G.) Stipa-'^ocxdXxon. Rocky slope near entrance to Ouebrada de las 

 Vacas, 102 19 1 7. 



IlI-II: 3 Halorrhagis masafuerana I 



Nicotiana cordijolia i Peperomia berteroana i rare 



ll- 2 On loose stones 



Stipa laevissi?na 4 Buellia masafuerana 



» neesiana 4 » stellulaia cop. 



Anthoxanthum odoratum 3 Lecanora atra 



Bromus unioloides 3 Pertusaria melanocarpa cop. 



Halorrhagis asperrima i Rhizocarpon geographicum 



87. As St. 86. Epilithic mosses and lichens on the valley floor near entrance 

 to Ouebrada de las Casas, 10/3 191 7. 



Anacolia subsessilis var. Acarospora smaragdula var. 



Campylopus aberrans Caloplaca rubina cop. 



Ceratodon purpureus Candelariella vitellina cop. 



Eustichia Poeppigii Lecanora polytropa 



Funaria hygrometrica L^ecidea enteroleuca cop. 



Ptychomnium fernandezianum Parmelia caperaia 

 Rigodium arborescens 

 Trichostomum brachydontium 



88. (14 F.) Degraded Stipa laevissifna-Soc'iation. Ensenada Token, on stony 

 talus slope near the sea, 2/2 1917. 



II -2 Bromus unioloides i 



Stipa laevissima 5 Chenopodium murale I 



Anthoxanthum odoratum 3 Physalis peruviana i 



Avena barbata 2 Rumex cripus i 



Chenopodium multifidum i greg. Marrubium vulgare i 



