178 



PHOMALES 



o. Basidia obsolete or none; conidia 

 histogenic 

 (m) Spores globose or trigonous 

 r. Spores globose; floricole 

 s. Spores trigonous; ramicole 

 (n) Spores not globose or trigonous 

 r. Pycnidia coriaceous or carbonous, 



more or less sclerotioid 

 s. Pycnidia membranous 

 (y) Pycnidia without ostiole 

 m. Basidia ramose 

 (m) Pycnidia with central columella; 



condia acrogenous 

 (n) Pycnidia without columella; co- 

 nidia acro-pleurogenous 

 n. Basidia simple 

 (m) Pycnidia membranous to subcar- 



bonous 

 (n) Pycnidia sclerotioid 

 o, Basidia obsolete or none; condia his- 

 togenic 

 (m) Conidia more or less catenate 

 (n) Conidia not catenate 



r. Conidia involved in mucus 

 s. Conidia without mucus 

 2. Pycnidia superficial 



a. Pycnidia rostrate or cylindric 



(1) Pycnidia rostrate; condia pleurogenous 



(2) Pycnidia cylindric, cornucopioid; conidia 



acrogenous 



b. Pycnidia neither rostrate nor cylindric 



(1) Pycnidia hairy or setose 



(a) Pycnidia membranous; ostiole present; 



basidia filiform 



(b) Pycnidia corio-carbonous; ostiole none; 



basidia none 



(2) Pycnidia glabrous 



(a) Conidia catenate; ostiole none; basidia 



none 



(b) Conidia not catenate 



X. Pycndia densely gregarious in asteroma- 



like spots; ostiole present 

 y. Pycnidia not in asteroma-like spots 

 (x) Ostiole present 

 m. Pycnidia more or less stipitate; foli- 



cole 

 n. Pycnidia not stipitate; lignicole 

 (y) Ostiole absent 

 m. Basidia ramose 

 n. Basidia none; conidia histogenic 

 (m) Pycnidia with hypostroma in the 



stomata 

 (n) Pycnidia without hypostroma 



Hapalosphaeria 22:868, H 33 

 Trigonosporium 16:892, H 31 



Plenodomus 3:184, H 13 

 Phyllostictina 



Conostroma 



Pleuroplaconema 



Phomopsis 18:264, H 257; 49 

 Sclerotiopsis 3:184, H 122 



Sirostromella H 2 



Coleophoma H 273 

 Dothichiza 3:671, H 11 



Plectonaemella H 20 

 Ccrnucopiella H 203 



Trichocicinnus 22:935, H 26 

 Pyrenochaetina H 123 



Sirolegniella 



Asteromella 3:182 



Rhizosphaera 22:917 

 Aposphaeria 3:169, H 24 



Ligniella 



Rhizophoma 

 Sclerophomina H 7 



