52 AXNALS OF THE MISSOURI BOTANICAL GARDEN 



[Vol. 6 



of the genus. The peridium is more nearly like that of A. 

 Borziana than of A. Soderstromii, but it is much thicker than 

 either and has long perpendicular hyphae forming a distinct, 

 pseudoparenchymatous tissue. The conidia-like cells which 

 are given off from the tips of these hyphae may be an un- 

 observed character in A. Borziana, but probably do not occur 

 at all in a species like A. Soderstromii where the peridial 

 hyphae extend parallel with the surface. The spores of A. 

 caudata are like some Hymenogaster spores and if these only 



are observed one would naturally put the species in Hymeno- 

 gaster. 



Specimens examined: 

 California: Berkeley, N. L. Gardner, type (in Univ. Cal. 

 Herb., 219, 219a, 219b, and 219c, Zeller Herb., 1623, and 

 Dodge Herb., 1249). 



1 



2. Arcangeliella Soderstromii (Lagerh.) Zeller & Dodge, 



comb. nov. 



Hydnangium Soderstromii Lagerheim in Patouillard & 

 Lagerheim, Soc. Myc. Fr. Bui. 9 : 142. 1893; Saccardo, Syll. 

 Fung. 11 : 172. 1895. 



Illustrations : Patouillard, Soc. Myc. Fr. Bui. 9 : pi. 8. f. 6, 



6a-c. 



Type : location unknown to us, but a cotype is in the Lloyd 

 Museum. 



Fructifications subglobose to pyriform, buckthorn-brown to 

 Isabella-color, 2-3.5 cm. in diameter; sterile base attenuate, 

 short; columella usually percurrent, confluent with the 

 peridium above, slender, unbranched; peridium thin, 50-70 

 n thick, evanescent, ochraceous-tawny, composed of slender, 

 interwoven hyphae, with lactiferous ducts extending parallel 

 with the surface; gleba fragile when dry, chamois to Isa- 

 bella-color; cavities variable in size, radiating from the base 

 and columella; septa 40-45 p broad, melleus, stupose, with a 

 few lactiferous ducts; cystidia clavate, often mucronate, 

 38-40x8-10 it, hyaline, guttulate; paraphyses truncate- 

 clavate, septate, hyaline; basidia subcylindrical, hyaline, gut- 

 tulate, mostly 2-spored, 40-60x6-10 /u; sterigmata stout, 



