﻿of North America. 19 



vermicular anastomosing lines; sterile cells dusky brown, ellip- 

 soidal, globose, or subcubical, usually shriveled, mostly separate 

 but sometimes forming catenulate groups or variously adherent. 



On moist earth. South Carolina (Ravenel, Austin) ; Florida 

 (Chapman, Austin); Alabama (Mohr); Louisiana (Joor, fide 

 Austin, Langlois, no. 395, />./.). 



Type in Herb. Pearson ; duplicate in Herb. Columbia Univer- 

 sity. 



The spores in A. Ravenelii show considerable variation in 

 their markings, from anastomose-reticulate ridges to separate 

 papillae, but we have observed quite wide extremes in respect to 

 this character even in different parts of a single capsule. Yet the 

 papillae are less commonly reduced to reticulate lines in the 

 Louisiana and Alabama specimens than in those from South 

 Carolina and Florida. 



Anthoceros Lescurii and A. Joorii were retracted by Austin 

 himself four years after their proposal,* these being considered 

 mature conditions of A. Ravenelii, which was originally described 

 from immature material. In A. Olneyi Aust., the erectness of the 

 frond appears in all the specimens we have seen to be due largely 



a 



to the way the plant is glued and pressed to the mounting paper. 

 The " large, black, globular, tubercuiated granules just beneath 

 the surface of the frond," for which A. Olneyi is chiefly remarkable, 



■ 



are spore-masses or possibly undeveloped perithecia belonging 

 to a peculiar endophytic fungus. The thallus is permeated with 

 colorless or light-brown septate hyphae at the ends of lateral 

 branches of which are formed globular clusters, 25-45 [i in diam- 

 eter, each composed of numerous dark, smoothed-walled cells, 

 measuring 6-10 //. The fungus bears some superficial resem- 

 blance to certain of the Tilletiaceae. The same parasite occurs 

 also in specimens of A. Ravenelii from Mobile, Ala. (Mohr), and, 

 occasionally also, the same or a very similar one in A. Hallii from 

 Seattle, Washington (Hep. Am. 162). 



10. Anthoceros Macounii sp. nov. 



Thallus forming small dark green rosettes, 4-10 mm., in di- 

 ameter, strongly undulate-crisped, subradiately inciso-laciniate or 

 somewhat broadly lobed, rugose, pitted, sometimes slightly lamel- 



*~— - -^^^"* ■ I ■ ■ **— ^ *^ I » ■■ Ml — ^ ^ ^^.^^ _^ ^^^^_^_ . . . __ . g - - -, J__I_ M _ _. _ _^^^ 



* Bull. Torr. Bot Club, 6: 305. 1879. 



