White: Tylostomaceae of North America 439 



B. phalloides Pers. England, Italy, North America (?). 



B. Gaudichaudii Mont. Peru. 



B. Guicciardiniana Ces. Italy. 



B. Tepperiana Ludw. Australia. 



B. Stevenii (Libosch.) Fries. Siberia. 



B. Digueti Pat. & Har. North America. 



B. attenuata Peck. North America. 



B. Muelleri Kalchbr. Australia. 



B. Guachiparum Speg. Argentina. 



B. Patagonica Speg. Argentina. 



Synopsis of the Nortli American Species 



Stem hollow. 



I. B. lacviiata. 



Plants more than 20 cm. high ; volva double, the inner layers split into numerous 



leaves. 

 Plants 20 cm. high or less. 



Spores minutely verrucose ; volva simple. 2. B. Griffithsii 



Spores nearly smooth ; volva triple. 3- B. Digueti. 



Stem solid. 4. B. attenuata. 



1. Battarrea laciniata Underwood, sp. nov. 



Peridium 5-6 cm. in diameter, 2-3 cm. high, smooth, mem- 

 branaceous, the upper portion sometimes having portions of the 

 outer coat of the volva adhering to it : the lower portion after the 

 spores have been shed is a yellowish-white and shows traces of 

 where the capillitium has sprung : stem 25-35 cm. long, woody, 

 hollow, stuffed with silky, thread-like fibers running about half 

 way down the center of the stem, outer coat fibrous, pealing, some- 

 times merely lacerate, at others shaggy, slightly tapering to the 

 base, about 2.5 cm. at the top and 1.5 cm. at the base : volva com- 

 plex, composed of a thick outer coating, and an inner set of very 

 numerous thin leaflets arranged more or less in layers about the 

 stem : capillitium whitish, hyaline, indefinite, irregular, somewhat 

 fascicular: cells 30-50 //. long, 5-7 fi wide, with raised annular 

 thickenings or nearly flat spiral markings : spores subglobose, 

 reddish-brown, 5-7 p in diameter, almost smooth. (PI. 36, f. 1-6.) 



Mexico : Mesill 



Digueti 



it is distinguishable (1) By its much larger size, (2) By its having 

 no inner woody volva enclosing the lower portion of the stem, (3) 

 In the much larger number of leaflets which compose the inner 

 portion of the volva, and (4) In the different coloring and marking 



