1914] 



BURT — THELEPHORACE^ OF NORTH AMERICA. Ill 381 



''On living leaves of Sabal Palmetto, Louisiana, Nov. 1885. 

 Rev. A. B. Langlois, No. 57. Shallow cup-shaped, thin, substi- 

 pitate, oblique, less than 1 mm. across, whitish and nearly 

 smooth outside, hymenium bluish or lead colored. Spores 

 filiform multinucleate, upper end thickened, curved into a 

 semicircle, 40-60 ju long by 1| m thick, on short (11-12 x 1^-2 n) 

 subcylindrical sporophores, which are a little thickened below." 



This species was distributed in 1891 in Ell. & Ev., N. Am. 

 Fungi, 2602, the specimens having been collected on living 

 stems of Smilax in Louisiana by Mr. Langlois. Mr. Langlois 

 communicated to me still better specimens on dead canes of 

 Arundinaria. The fructifications occur scattered here and there 

 in grayish areas 2-4 mm. long by ^-1 mm. broad on the surface 

 of the stems. Dr. Farlow informs me in a letter as the proofs 

 are at hand that the above species is the lichen Heterothecium 

 Augustinii Tuckm. 



(To be continued.) 



