45° The Ohio Naturalist. [Vol. IX, No. 4, 



Parasitic or saprophytic fungi with a septate myceHum and 

 asci usually containing a definite number of ascospores, the asci 

 often produced as the result of a conjugation of two branches 

 of the mycelium, or sometimes by a more highly developed sex- 

 ual process; conidiospores commonly developed, in many groups 

 the conidial stage only being known. 



Subclasses, Hemiascae 

 Exoascae 

 Discovnycetae 

 Pyrenowiycetae 

 Discolichenes 

 Pyrenolichenes 

 Deuteromycetae 



23. Laboulbenieae. 150 species. 



Minute fungi with a septate body parasitic upon insects, 

 usually beetles, connected with the host by means of a dark- 

 colored horny base serving as an organ of absorption and a hold- 

 fast; oogonium with a slender projection, the trichogyne, to 

 which the nonmotile spermatia become attached, finally fer- 

 tilizing the oosphere below; as the result of fertilization a number 

 of sacs or asci are produced which contain the nonsexual asco- 

 spores. 



24. Teliosporeae. 2100 species. 



Parasitic fungi with the septate mycelium developed in the 

 tissues of the host, finally producting teliospores which give rise 

 to septate or nonseptate basidia on which basidiospores are pro- 

 duced; some groups producing five kinds of spores, often heter- 

 oecious; especially abundant on plants of the Grass family. 



25. Basidiomycetae. 10,000 species. 



Mostly large saprophytic, rarely parasitic, fungi with a sep- 

 tate mycelium ; developing septate or nonseptate basidia on the 

 vegetative mycelium, no teleospores being produced; basidia 

 usually with two or four spores. 



Subclasses, Protohasidiae 



Hymenoinycetae 

 Gasteromycetae 

 Hymenolichenes . 



III. BRYOPHYTA. 17,000 species. 



26. Hepaticae. Liverworts. 3875 species. 

 Gametophyte thalloid or a stem-like frond with scales which 



are without a costa, mostly dorsiventral, usually with a sack-like 

 envelope, the perigvmium, around the archegona; rhizoids thread- 

 like and unicellular; protonema usually small or only slightly 

 developed, transient. Sporophyte either a spherical sporangium 

 without foot or stalk, or difl:erentiated into sporangium, foot and 



