202 



Mycologia 



20. Echinodothis Atk. ; Bull. Torrey Club 21: 224. 1894 



Stroma subfleshy or corky, light colored, pulvinate to sub- 

 globose or irregular in form, often constricted at the base, some- 

 times entirely surrounding the host, consisting or several layers 

 of different consistency; perithecia superficial, scattered, sub- 

 cylindrical, sessile, giving an echinulate appearance to the stroma ; 

 asci cylindrical, 8-spored ;' spores linear, septate, at length sepa- 

 rating at the septa into short segments. 



Type species : Hypocrea tuberiformis Berk. & Rav. 



1. Echinodothis tuberiformis (Berk. & Rav.) Atk. Bull. Torrey 



Club 21 : 224. 1894 

 Hypocrea tuberiformis Berk. & Rav. Grev. 4: 13. 1875. 

 Dussiella tuberiformis Patouillard, Soc. Myc. France 6: 107 (in 

 part). 1890. 



Hypocrella tuberiformis Atkinson, Bot. Gaz. 16: 282. 1891. 



Stroma subglobose, 1 cm. or more in diameter, entire, lobed 

 or divided, seated upon the reed or upon the leaf sheath and 

 fastened by a whitish mycelium consisting of radiating threads 

 which are sometimes tinged yellowish brown ; substance leathery 

 or corky, consisting of three layers, an inner layer white to 

 pinkish, an intermediate layer light ochre and an outer layer 

 cinnamon ; stroma externally dark brownish becoming black ; coni- 

 diophores needle-shaped; conidia oval to fusoid, 3-4 X 7-10 mic; 

 perithecia entirely superficial in small clusters or evenly dis- 

 tributed over the exposed surface of the stroma; subconical in 

 form, giving the whole stroma a spiny appearance ; clothed except 

 the apex with a dense covering of minute threads which are at 

 first whitish becoming cinnamon-colored, the naked apex becom- 

 ing black, about .3X1 mm. ; asci 8-spored cylindrical, with a 

 swelling at the apex, very large, 475-750 X 14-20 mic. ; spores 

 nearly as long as the ascus, hyaline or slightly yellowish, many- 

 septate, joints 15 X 4-5 mic. (pi. 13, f. 15). 



On stems of Arundinaria. 



Type locality: South Carolina. 



Distribution: South Carolina to Alabama. 



Illustrations: Atkinson, Bot. Gaz. 16: pi. 25. 



Exsiccati : Ravenel, Fungi Am. Exsicc. 7jj. Other speci- 

 mens examined: Alabama, Atkinson 2218; South Carolina, 

 Ravenel 619. 



The first description of this species was evidently drawn from 



