MELANCONIACEAE 135 



Order 17. MELANCONIALES 



Family 74. MELANCONIACEAE 



Pycnidia lacking, or reduced to a stratum merely; strata typically bearing basidia 

 of various sorts upon which conidia arise, forming masses or acervuli, which are 

 immersed or erumpent, black, gray or light-colored, waxy, corneous or even sub- 

 membranous. 



Hyalosporae 



3 : 698, 10 : 446, 11 : 562, 14 : 1004, 16 : 995, 18 : 447 



Conidia hyaline, i-celled, globose to oblong, rarely dilutely colored 



I. Conidia muticate 



1. Masses, or acervuli, not setose 



a. Conidia not catenate 



(1) Masses bright-colored, subtremelloid 



Hainesia 3: 698 



(2) Masses gray to black, rarely bright-colored, waxy or horny 



(a) Masses gray, rarely bright-colored, waxy 



x. Growing on leaves or fruits for the most part 



Gloeosporium 3: 699 



y. Growing usually on twigs of trees or shrubs 



Myxosporium 3:722 



(b) Masses black, discoid, horny Melanostroma 3:728 



b. Conidia in chains 



(1) Masses oblong, hysterioid, dark, hard 



Hypodermium 3: 728 



(2) Masses discoid, pulvinate or conoid 



(a) Masses bright-colored, softish Myxosporella 3:729 



(b) Masses dark to black 



x. Basidia repeatedly branched 



(x) Masses discoid; basidia dichotomous 



Blennoria 3: 730 

 (y) Masses depressed-pulvinate ; basidia verticillate 



Agyriella 3: 731 

 (z) Masses perithecioid ; basidia irregularly branched 



*Hormyllium 3:733 

 y. Basidia simple 



(x) Masses perithecioid, black *Thecostroma 3:752 



(y) Masses scutellate, olive or ashen 



Myxormia 3: 734 

 (z) Masses truncate, black below, pale above 



Bloxamia 3: 734 



2. Masses setose at margin ; basidia short, fasciculate 



Colletotrichum 3:735 



II. Conidia aristate with a branched awn at apex 



Pestalozziella 3: 737 



