76 
The 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; nonsexual 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 chlamidospores (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. Pyrknolichenes. l(i. 
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 number 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 hymenium; mostly parasitic 
Exoascales. 
18. Asci entirely isolated; vegetative reproduction by budding 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 hy r menial layer 
(Ascoma). Discomycetae. 20. 
20. Apothecia pulverulent, spheroidal, plants saprophytic. 
Protocaliciales. 
20. Apothecia not pulverulent. 21. 
