ARCANGELIELLA, GYMNOMYCES, AND 



MACOWANITES IN NORTH 



AMERICA 



SANFORD M. ZELLER 



Visiting Fellow in the Henry Shaw School of Botany of Washington University 



DODGE 



ckland 



Washington University 



ARCANGELIELLA 



Arcangeliella Cavara, Nuov. Giorn. Bot. Ital. N. S. 7: 117- 

 128. 1900; Saccardo & Sydow in Sacc. Syll. Fung. 16:255- 



256. 1902. 



The type species of the genus is Arcangeliella Borziana 



Cavara. 

 Fructifications gregarious, hypogaeous or emergent, fleshy, 



lactiferous; peridium thin, separable with difficulty, extend- 

 ing to the base in young specimens but evanescent and disap- 

 pearing below at maturity; columella simple or branched, 

 often extending to the peridium above; base more or less 

 sterile, usually attenuated and leading to rhizomorphs, gen- 

 erally lactiferous ; gleba fragile, lactiferous ; cavities minute, 

 irregular, radiating more or less from the columella and 

 base; basidia 2-4-spored; cystidia present; spores globose 

 to ellipsoidal, echinulate to verrucose, tinted. 



This is a distinct genus which is closely related to Maco- 

 wanites Kalchbr. The description has been emended here to 

 include some variation in characters which evidently Cavara 

 did not have the opportunity to observe in the type species 

 and which are necessary to include Arcangeliella caudata and 

 A. Soderstromii. 



1. Arcangeliella caudata Zeller & Dodge, sp. nov. 



Fructificationes globosae, base attenuata, superne complanatae aut 

 piriformis, "dilute brunneae vel saturatius vel fusco-rubideae, area 

 subalbida parva inferne prope stipite excepta" (Gardner) , 

 brown" vel "clove-brown" (Ridgway) superne, "clay-color" vel 

 "olive-brown" (Ridgway) inferne servatae, 0.8-2 cm. diametro, 



Ann. Mo. Bot. Gard., Vol. 6,1919 v ' 



"mum 



