The imperfect forms are those wiiich are assumed to be genetically related to other fuugi, probably 

 Ascomycetes, in contradistinction to the perfect fuugi, which have an independent life-history. 



The characteristic features of each of the twelve groups are liere shown, then the general classification of 

 each group is given iu its proper connexion. 



BASIDIOMYCETES. — Naked spores borne on basidia. Receptacle distinct. 

 I. — I-IvMENOMTCETES. — Hymcnium external. 

 II. — Gastuomycetes. — Hymcnium internal. 



^CIDIOMYCETES. — ^cidium or cluster-cup forms a feature of the life-history. 



III. — Uredines. — Receptacle none or obsolete. 

 ASCOMYCETES. — Spores produced iu asci or spore-sacs. 



IV. — PyRENOMrCETES. — Receptacles {Perithecia) flask-shaped or spherical, opening at apex. 

 V. — DiscoMTCETES. — Receptacles (Apothecia) disc- or cup-shaped. 



VI. — Tdberoides. — Subterranean, suli-globose, indehiscent. 



IMPERFECT FORMS OF ASCOMYCETES ?— 

 VII. — IlYrnOMYCETES. — Perithecia absent. 

 VIII. — Spii^ropsides. — Perithecia present. 

 IX. — Saccharomycetes. — Multiplication by gemmation and ascospores. 



TRANSITIONAL FORMS.— 



X. — UsTiLAGlNES. — Miuutc, parasitic, u.sually spores of one kind only. 

 ALGA-LIKE FORMS.— 



XI. — PnY'COJiY'CETES. — Mycelium without septa. Sexual and asexual reproduction. 



ANIMAL-LIKE FORMS.— 



XII. — Myxomycetes. — Plasmodium or naked mass of motile protoplasm formed and hyphoB absent. 



