214 HERRE 



About 20 species growing on earth and bark, especially in alpine 

 and sub-arctic regions. 



KEY TO THE SPECIES. 



A. Thallus black, green-black, rarely brownish-black i. jubata 



A A. Thallus brown, reddish brown, or pale 2. fremontii 



I. ALECTORIA JUBATA (L.) Nyl. 



Z?c/?ewyw&a/w5 Linne, Sp. Plant. 2: 1155. 1753. 

 Alectoria jubata Nylander, Journ. Bot. 233. 1872. 

 Alectoria jubata Tuck. Syn. N. Am. Lich. I: 44. 1882. 

 Alectoria jubata Herre, Proc. Wash. Acad. Sci. 7: 346. 1906. 



Thallus tufted, pendulous, elongated, slender, terete, smooth, 

 pohshed, very much branched and hair-like, forming tangled clumps 

 and mats; small greenish, powdery, lateral soredia sometimes pres- 

 ent; color black, green-black, or rarely brownish black. 



Always sterile with us. On trees and shrubs, above 1800 feet; 

 occurring on Pseudotsuga taxifolia, wherever it grows, and also on 

 oaks and Adenostoma. A peculiar plant, resembling mats of much 

 tangled fine black hair. 



Occurring in the cooler parts of the earth and on high mountains 

 of the warmer regions. 



2. ALECTORIA FREMONTII Tuck. 



Alectoria fremontii Tuckerman, Proc. Amer. Acad. Arts & Sci. 422. 



1859. 

 Alectoria fremontii Tuck. Syn. N. Am. Lich. I: 45. 1882. 



Thallus pendulous, elongated, forming densely tangled tufts or 

 clumps, smooth; branches irregular, flexuous, terete, their tips 

 becoming very long and thin and undivided; color brown, or uniform 

 reddish brown, or sometimes paler. 



Not seen in fruit by me. 



Occurring on large coniferae in the redwood forests. I have seen 

 but two specimens from our territory; one collected by Dr. Ander- 

 son, near Santa Cruz, and the other collected by one of my students, 

 Mr. Harold Hannibal, at Scotts Valley, some miles north of Santa 

 Cruz. 



Common on various coniferae in the Sierra Nevada Mts., and in 



