LICHENS OF SANTA CRUZ PENINSULA 389 



3. CLADONIA FIMBRIATA CLAVATA Arn. 



Primary thallus of leafy, rounded, very numerous and imbri- 

 cate squamules, more or less ascendant, passing finally into an 

 effuse, powdery crust ; margin crenate or incised, upturned ; 

 color brown, varying from pale whitish or brownish green to 

 dark ; margin usually paler ; beneath while. Podetia ascendant 

 from surface of primary squamules, simple, stout, cylindrical, 

 trumpet- or club-shaped, the tips obscurely cup-like, with more 

 or less denticulate margin, or more usually blunt or pointed ; 

 thickly covered with a greenish or whitish powder. Apothecia 

 rare, small, terminal, or on the denticulate margin of the cups ; 

 becoming confluent and larger; very dark brown. 



A common lichen on rotton wood, earth and moss ; occasional 

 on old roofs. Generally distributed throughout the peninsula. 

 Cladonia fimbriata clavaia Arnold. Act. Soc. Faun. Fl. Fenn. 



10: 293. 1894. 

 4. CLADONIA FIMBRIATA CORNUTA (L.) Acharius. 



Primary thallus of leafy, elongate squamules, more or less 

 lobed, with crenate or laciniate margins; color pale or dull 

 sage-green ; beneath very white. Podetia rising from surface 

 of squamules; simple, small to medium, slender, terete ; api- 

 cally pointed and thread-like ; or coarser, thicker, blunt, with 

 greatly reduced, minutely denticulate cups ; more or less thickly 

 covered with a greenish powder, through which the white cor- 

 tex is more or less visible. Apothecia very minute, brown, on 

 tips of denticulation of cups. 



On dead wood, rotten logs, and old roofs. I have specimens 

 from the roof of a house in Mayfield, at an altitude of about 35 

 feet, and from logs of Sequoia semfcrvircns in the hills above 

 Wright's Station, at from 1200 to 1500 feet altitude. Probably 

 occurring throughout our range wherever redwoods are native. 

 Lichen cor7iutits L. Sp. PI. 2: 1152. 1753. 

 Cladonia Jimhriata coniuta Ach. Syn. Meth. Lich. 257. 1814, 



5. CLADONIA FIMBRIATA TUB^FORMIS Hoffm. 



Primary thallus densely imbricate, squamulose. Podetia 

 short, stout, broadly trumpet-shaped ; covered witli a greenish 



Proc. Wash. Acad. Sci., March, 1906. 



