Howe: American Species of Alectoria 



139 



(TH). Keewatin: Marble island (CGS). Alaska: Pt. Bar- 

 row, E. Leynest (ANS) ; Unalaska island, /. H. Bean, Oct. 

 i, 1880 (NH); Cape Nome, W. A. Setchell, July 25, 1899 

 (CEC) ; St. Michaels, L. M. Turner, Oct. 11, 1875 (CEC) ; St. 

 Michaels, W. A. Setchell, July 19, 1899 (CEC) ; St. Paul's island, 

 /. M. Macoun, June 19, 1897 (CGS) ; St. George island, /. M. 

 Macoun, June 7, 1897 (CGS). British Columbia: Summit 

 Gold Range, Macoun, Aug. 10, 1889 (CGS). 



Alectoria ochroleuca (Ehrh.) Nyl. Prod. Lich. Gall, et Alg. 



Act. Soc. Linn. Bord. 1 : 292. 1856, separate 46. 1857 

 Lichen ochroleucos Ehrh. 1. c. 



Type : Not indicated, but the specimen on which the species is 

 based may possibly be found in Erhart's herbarium at Gottingen, 

 or at Leipzig or Moscow, though I have been unable to definitely 

 locate it. 



Type locality : Not mentioned. 



Original description : " dichotomo-ramosus, teres, erectiuscu- 

 lus, inarticulatus, inanis, ochroleucos ; ramis divaricatis : apicibus 

 furcatis, nigris." Ehrh. Beitrage zur Naturkunde, 3 : 82. 1788. 



Figure: HofTm. Descript. adum. Lich. pi. 26. f. 2, and pi. 68. 

 /• 5-7- 



Sowerby, Eng. Bot. 33 : pi. 2374. 1812. 



Diagnosis : Thallus erect, Cladoniform, branches rigid, apices 

 blackening. 



Description : Thallus erect, Cladoniform, rigid, often sulci- 

 form or foveolate, branches subterete, proximal portions vires- 

 cent to stramineous, apices blackening; cortex glabrous, dull, 

 papillate or striate ; primary branches dichotomous, f ruticulose 

 (max. length 15 cm.); secondary branches dichotomous; fibrils 

 entangled, frutescent, ramulous, apices furcate. Apothecia sub- 

 terminal or lateral, rare, large (max. diam. 8 mm.), concave or 

 applanate, at length convex, innate-marginate, margin disappear- 

 ing and lacerate, disk chestnut. Spores 18-48 X 13-28/*. 



Contingent phases: (a) concolorous, divaricate ( ?f. tenuior 

 Crom. Jour. Bot. 10: (1) 232. 1872). 



Substrata: On the earth. 



Geographical distribution : Confined to the Boreal zone. It 

 has been reported from Maine (Eckfeldt) , Quebec (Macoun), 



