MELANCONIACEAE 



197 



(a) Rows more or less clearly spiral 



(b) Rows not spiral 



X. Rows on a central axis 

 y. Rows on the tip of the basidium, often 

 ramose 

 (2) Conidial rows not forming heads 



(a) Masses oblong, hysterioid, dark, hard 



(b) Masses discoid to pulvinate 



X. Masses bright-colored, soft, subgclati- 



nous 

 y. Masses dark, not gelatinous 

 Conidia not catenate 



(1) Masses linear 



(2) Masses discoid to pulvinate 



(a) Conidia 1-x on each basidium 

 X, Basidia ramose 



y. Basidia simple 

 (x) Masses with brown setae 

 (y) Masses without setae 

 m. Basidia bacillar; conidia 2-3 

 n. Basidia broadly clavate; conidia 3-8 

 (m) Masses byssoid, yellow; on roots 

 (n) Masses minute, white, exserted 

 from the stomata; in leaves 



(b) Conidia single 



X. Conidia allantoid 

 y. Conidia not allantoid 

 (x) Basidia ramose, long 

 m. Masses bright-colored, red or rose; 



basal stroma thin; folicole 

 n. Masses hyaline to brownish; basal 

 stroma thick, sometimes sublocu- 

 late; ramicole 

 (y) Basidia typically simple 

 m. Masses folicole or fructicole 

 n. Masses ramicole 

 (m) Basidia arising from inner side of 

 vertical hyphae, more or less 

 knobbed 

 (n) Basidia normal 



Hyperomyxa H 339 

 Conoplea H 339 

 Thyrsidiella H 339 

 Hypodermium 3:728 



Myxosporella 3:729 

 Bloxamia 3:734 



Rhabdogloeum 



Discosporella H 373 

 Protocoronis 21:241 

 Rhabdogloeopsis 

 Aureobasis 11:131, K 134 

 Microstroma 4:9, K 131; 53 

 Naemospora 3:746; 52 



Hypogloeum 



Cytogloeum 

 Gloeosporium 3:699; 51 



Cryptosporiopsis 

 Myxosporium 3:728 



Phaeosporae 



3:748, 10:471, 11:571, 14:1018, 16:1008, 18:469, 22:1206 

 Conidia 1-celled, dark, globose to oblong or fusbid 



A. Conidia catenate or capitate 



1. Conidia catenate 



a. Conidial chains separate 



b. Conidial chains radiate in a mucose head 



2. Conidia capitate or clustered at the tip 



B. Conidia single 

 1. Conidia globose to oblong or fusoid 



a. Conidia globose to oblong 



(1) Masses setose 



(2) Masses not setose 



Trullula 3:731; 52 

 Thyrsidium 3:761 

 Botryoconis 



Melanconium 3:749; 52 

 Chaetobasis 



