302 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Key to the Species of Bulbiferous Fungi. 



Primordium normally involving more than one cell. 

 I. Bulbils black or smoke-colored. 



1. Bulbils 75-100 M indiam. margin even Cuhonia bulbifera. 



2. " 200-300 M " " " in-egu\a,r . . Papulospora pannosa. 



II. Bulbils yellowish red to dark brown. 



1. Hyphae showing elamp-connections. 



1. Bulbils dark brown or chocolate colored. 



i. Bulbils 65-80 /j. in diam. clamps conspicuous. 



Corticiurn alutaceum. 

 ii. " 125-175 M " " margin even, clamps incon- 

 spicuous Pupulosporaanomala. 



2. Bulbils yellowish or light brown. 



i. Bulbils light yellow, hyphae radiating conspicuously. 



Gra ndi nia a'uslosa. 

 ii. Bulbils brownish yellow, hyphae formed evenlv. 



"No." 200." 



2. Hyphae not showing clamp-connections. 



1. Bulbils scanty, perithecia usually present. 



i. Perithecia with neck, lateral and terminal setae. 



Mtlanospora cervicula. 

 ii. " " papilla and terminal setae. 



Melanospora papillata. 



2. Bulbils abundant, perithecia usually absent. 

 i. Primordium intercalary. 



(i). Bulbils brownish-yellow, central cells 28-55 m 



in diam Papvlospora immersa. 



(ii). Bulbils straw-colored, central cells 10-20 a; in 



diam Papulospora irregularis. 



ii. Primordium one or more lateral branches. 



(i). Primordium normally a single lateral branch, 

 a. Primordium a spiral. 



§ Cells heterogenous, definite cortex. 



A. One central cell. 



§ Cortex complete. 



Papulospora parasitica. 



# ^ Cortex incomplete. 



Acrospeira inirabilis. 



B. More than one central cell. 



# Spiral in one plane, cortical 

 cells spinulose 



Papulospo ra spin ulosa . 



# M Spiral normally in more 



than one plane, 2-6 central 

 cells. 

 a Bulbils dark brown. 



Papidosporn coprophila. 

 P Bulbils brick red. 



Papulospora rubida. 

 §§ Cells homogenous, bulbils 21-36 ^ in 

 diam. brownish producing sporo- 

 trichum spores. 



Papulospora sporotrichoides. 



