76 Tke Ohio Naturalist [Vol. XIII, No. 4, 



9. Saprophytic, or occasionally parasitic on other molds. Mucorales. 

 9. Parasitic on insects, as flies, grasshoppers, plant lice, etc. 



Entomophthorales . 

 10. Mycelium poorly developed, with septa; endophytic parasites, mostly 

 in fresh water algae, some in the roots of higher plants. Ancylistales. 

 10. Saprophytic or parasitic, mostly aquatic molds; mycelium well devel- 

 oped; nonsexual reproduction by zoospores. Saprolegniales. 



10. Parasitic on the higher plants; nonsexvtal reproduction by aerial conidia 



which may give rise to zoospores. Peronosporales. 



—11— 



11. Hyphae usually forming sporocarps having spores enclosed in asci. 



ASCOMYCETAE. 12. 



11. Plant body minute, erect, few-celled, growing parasitic on insects; 

 perithecia on a receptacle; asci usually 4-spored. 



Laboulbenieae. Laboulbeniales. 

 11. Parasites with basidia coming from chlamido.spores (teleutospores) 



which are with or without stalks. Teliosporeae. 31. 

 11. Hyphae usually forming sporocarps bearing basidiospores on basidia 

 arising directly from the mycelium. Basidiomycetae. 33. 



11. Hyphae bearing only conidia, in pycnidia, or the conidia superficial 



borne on loose or innate hyphae; asci or basidia not known. 



Deuteromycetae. 29. 



12. Fungi symbiotic with algal cells. Ascolichenes. 13. 



12. Fungi without helotic algae in their bodies. 17. 



13. Asci on an apothecium. Discolichenes. 14. 



13. Asci in a perithecium. Pyrenolichenes. 16. 



14. Paraphyses forming a powdery mass with the spores, the paraphyses 



growing beyond the asci, forming there a network, adhering to the 

 disk of the apothecium which soon breaks up into a powdery mass 

 with the spores. Algae belonging to the Gonidiophyta. 



Conyocarpales. 



14. Paraphyses not forming a powdery mass with the spores. 15. 



15. Disk of the apothecium linear, ellipsoid, or somewhat angular. Algae 



belonging to the Gonidiophyta. Graphidales. 



15. Disk of the apothecium circular. Algae belonging to the Gonidiophyta 



or to the Cyanophyceae. Cyclocarpales. 



16. Cavity of the perithecium simple, not divided by complete or incom- 



plete partitions. Pyrenulales. 



16. Cavity of the perithecium divided by complete or incomplete parti- 



tions. Mycoporales. 



17. Asci with a variable numljier of spores, usually many-spored. 



Hemiasceae. Ascoideales. 

 17. Asci with a definite number of spores in typical cases, separate from 

 each other, not forming a definite fruiting body. ExoASCEAE. 18. 



17. Asci with a definite number of spores in typical cases, collected on or 



in an ascocarp. 19. 



18. Asci approximate and forming an indefinite hynunium ; mostly parasitic 



Exoascales. 



18. Asci entirely isolated; vegetative reproduction liy l)udding of the 



cells; plants producing alcoholic fermentation. Saccharomycetales. 



19. Asci collected in enclosed tuber-like bodies or fasciculate, and sur- 



rounded by a spherical, cylindric, pyriform or shield-like wall, the 

 perithecium. 24. 



19. Asci collected in a flattened, concave or convex hymenial layer 



(Ascoma). Discomycetae. 20. 



20. Apothecia pulverulent, spheroidal, plants sapropliytic. 



Protocaliciales. 

 20. Apothecia not pulverulent. 21. 



