Substrata: On maritime rocks. 



Distribution: Uncommon in the Transition Zone on the southern Pacific 

 Coast. Seen only from the following stations: 



Stations: California: Pt. Lobos; Pt. San Pedro; Catalina Island; San 

 Diego; Monterey. 



Lower California: Guadalupe Island. 



Observations: This Nylander species, not recognized by Tuckerman, 

 seems possibly to deserve recognition as more than a phase of homalea. Its 

 shorter, more spatulate, dull laciniae and terminal apothecia may deserve for 

 it nomenclatural designation. It occurs with homalea and intergrades with the 

 type. Neither Drs. Hasse or Herre, to both of whom we are indebted for so 

 much of our knowledge of Californian lichens, have recorded the species. Sev- 

 eral specimens in Dr. Hasse's herbarium are, however, referable to it. Both 

 this and homalea rarely show the floccose condition described below. 



Ramalina ceruchis (Ach.) DeNot. 



Synonymy: Parmelia ceruchis Ach. Meth. Lich. 260. 1803. 



Ramalina ceruchis DeNot. Frammenti Lich., Giorn. Bot. 

 Ital. 2: 218. 1846. 



Type: In the Acharian herbarium, Universit- 

 etets Botaniska Institution, Helsingfors, fide Dr. 

 Fred. Elfvring. Duplicate material is in the Linnean 

 Society herbarium, London, fide author. 



Type locality: ''Peru. Ind. Orient. Koenig. " 

 Lima. 



Original description: "thallo membrana- 

 ceo albo-virescente ramoso, ramis vagis laxis in- 

 aequalibus subfasciculatis acuminatis; scutellis spar- 

 sis crassis disco piano albo-incarnato. " /. c. 

 Figure: PI. VII, f. 3. 



Diagnosis: Thallus caespitose, suhterete, at- 

 tenuate, suhrigid,* transverse-rimose, black punctate, 

 apothecia lateral, spores straight or substraight. 



Description: Thallus caespitose (max. length 

 8 cm.), subrigid, virescent, stramineous to orange 

 or pale rufescent (dark below) ; cortex glabrous, 

 transverse-rimose, subrugose, generally foveolate, 

 punctate with black spermogones; laciniae subterete, 

 simple or subsimple or sparsely branched (max. 

 width 2,5 cm.) apices attenuate. Apothecia not 

 uncommon, lateral, concave, applanate, or convex 



Pig. 2. Distribution of marginate, at length lobate (max. diam. 7 mm.), 



Ramalina ceruchis. thalline exciple glabrous, disk buff, often pruinose. 



Spores oblong, straight or substraight, 



