196 



COMPENDIUM OF GENERAL BOTANY. 



ductive organs, at least none liave so far been observed. It has 



very minute characteristic conidial 



'^'^^<j 



spores. 

 We 



sliall now discuss the 

 numerous fungi which have only 

 asexual reproduction, namely, the 

 Ascomycetes^ JBasidiomycetes., Ure- 

 diriecB^ and Ustilaginew. Tlie 

 differences in reproduction as ex- 

 pressed in the names of the first 

 two groups are illustrated in Figs. 



120 and 121. 

 Fig. 130. — Asci, with spores, of P«s«8a ■\\t-i.-i • ^^ ±. i 



aurantil Witlim the two large groups 



(After Berthoid and Landois.) AscoiYiycetes and Basidiomycetes 



there is in each a sub-group mthout a sporocarp or covering for 

 the spore-bearing tissue; the remaining sub-groups have sporo- 

 carps. In regard to the two genera Polyporus and Agaricus^ it 

 is to be observed that they represent the essential differences be- 

 tween the Agarioinei and Polyporei ; the lamellae (gills) in the one 

 and the pores in tlie other are simply different arrangements of the 





Fig. 131. Fi^- ^23. 



Fig. 131 and Fig. 133.— Gills (lamellge) from the lower surfuce of a toad-stool, 

 a. Moderately enlarged; b, basidium with four spores (liifrhly magnified.) 12-2, Lamellae. (After 



Berthoid and Landois.) 



hyphal tissue especially adapted to give rise to spore-producing 

 basidia. The following terms apply to the reproductive organs of 

 many Basidiomycetes : peridium, gleha, and capiUitium. The 

 first is the covering which encloses the entire spore-bearing tissue 

 of the Gasteromycetes. Gleha is the inner hyphal tissue enclosed 

 ' by the peridium. This hyphal tissue contains pores or chambers; 

 the walls of these pores are called tramci, and are lined witk 



