Howe: American Species of Alectoria 



119 



home (CEC) ; Clearwater Lake, A. P. Low, July 12, 1896 

 (CGS). Greenland: Rukstanseek, Vahl (NY); Holstensbory, 

 Th. Holm, Aug., 1886 (ANS) ; Christianshaab (NH); ?, G. 

 Edeling, 1896 (1,278 CM). Ungava : Diggs Island, R. Bell, 

 Sept. 15, 1884 (CGS). British Columbia: Vancouver Island, 

 /. Macoun, May 17, 1893 (NY) ; Parson's Mt, /. Macoun, May 

 17, 1893 (CEC, 3,174 F). Alaska: Pt. Barrow (NH) ; St. 

 Michael's, W. A. Setchell, July 19, 1899 (NH) ; Seward Pen., 

 A. J. Collier, 1900 (NH) ; Cape Nome, W. A. Setchell, July, 1899 

 (CEC); St. Michael's, S. M. Turner, Sept., 1875 (CEC) ; Hall 

 Island, W. Trelease, July 14, 1899 (CEC) ; Kadiak Island, W. 

 T release, July 21, 1899 (CEC) ; Bering St., C. Wright, 1853 

 (NH). Yukon: near Dawson, R. S. Williams, Apr. 2, 1899 

 (i860 H). Franklin: Melville Island, E. Parry (S). Kee- 

 watin: /. W. Tyrrell, July 28, 1893 (CGS). 



Alectoria chalybeiformis (L.) S. F. Gray, Nat. Arr. Brit. PI. 



1 : 408. 182 1 



Lichen chalybeiformis L. 1. c. 



Type: Species is based on Usnea rigida horsum, etc., of Dil- 

 lenius ; the Dillenian specimen, " Infertile," is in the Dillenian 

 herbarium, Botanic Gardens, Oxford, England, and is Alectoria 

 jubata, var. chalybeiformis (L.) fide Crombie. In the Linnaean 

 herbarium, " Lichen chalybeiformis (886) = Alectoria chalybei- 

 formis Wainio, Adj. I, p. 115, status thallo paululum vel sat 

 implexo fusco — vel olivaceo-nigricante (Alect. prolixa var. 

 chalybeiformis Auct.) fide Wainio. 



Type locality : " Europa." 



Original description : " filamentosus subramosus decumbens 

 implicato-flexuosus," L. Sp. PI. 2: 1 155. 1753. 



Figures: [Dill. Hist. Muse. pi. ij. /. 10. 1741.] Oeder, Fl. 

 Dan. 2 : pi. 262. 1766. 



Diagnosis : Thallus caespitose, brown, branches flexuous, ziriry 

 terete, often spinulose, and generally abundantly ruptured with 

 white soralia. 



Description : Thallus caespitose, precumbent or rarely sub- 

 pendulous, filamentous, wiry, terete to subterete, often spinu- 

 lose, dark to light brown ; cortex glabrous or nitidous, occasion- 



