340 Herre 



This lichen also occurs at slight elevations, on earth in rock 

 crevices. I have specimens from Pilarcitos Creek Canon, at 

 an altitude of 250 feet. 



Lichen glaiicus L. Sp. PI. 2: 1148. 1753. 

 Cetraria glauca Ach. Meth. Lich. 296. 1803. 



7. CENTRARIA TUCKERMANI Herre, nom. sp. nov. 



This form differs from C. glauca in having the lobes elon- 

 gated, lax, narrow or linear, and more or less channelled; mar- 

 gin irregularly cut and erose ; beneath black or dark brown 

 basally, the lobes white below. Sterile with us. 



Habitat : On Pseudotsuga taxifolia. 



Collected but once, near King's Mountain House, at the head 

 of Purissima Creek, at an altitude of 1900 feet. No doubt it 

 occurs all along the summit of the range mixed with C. lacunosa 

 stenophylla and C. glmica. 

 Cetraria glauca stenofhylla Tuck. Syn. N. Am. Lich. i : 36. 



1882 ; name preoccupied. 



8. CETRARIA JUNIPERINA (L.) Acharius. 



Thallus foliaceous, membranaceous and expanded, or else 

 tufted, irregularly cut-lobed and ascendant ; lobes crowded, 

 edges erose and crenate. Apothecia submarginal, the disk 

 chestnut ; margin crenulate or tuberculate. 



This lichen is known at once by its bright yellow color, alike 

 on both sides ; sometimes the yellow is tinged with greenish. 



Very abundant on the twigs and limbs of Pinus radiata {P. 

 insignis) at Pacific Grove, especially on dead wood. This is 

 extra-limital, being on the southern shore of Monterey Bay. 

 It also occurs in the mountains near San Juan, below the Pajaro 

 River ; this is just across from the southern extremity of the 

 Santa Cruz peninsula. I have no doubt however that it occurs 

 somewhere along the coast between Santa Cruz and Pescadero, 

 as Pinus radiata is found there also, and the conditions are 

 similar to those at Pacific Grove. 

 Lichen junipcriuus L. Sp. PI. 2: 1147. i753- 

 Cetraria junirpcrina Ach. Meth. Lich. 298. 1803. 



