AMEROSPORAE i49 



(2) Hyphae branched ; conidium at first enclosed in a vesicle from which 

 it escapes at the apex Conioscypha 18: 572 



2. Conidia in chains 



a. Sterile hyphae all creeping or obsolete 



(1) Conidia of two kinds; larger catenulate fuscous, smaller internal catenu- 



late cylindric hyaline Thielaviopsis 11: 612 



(2) Conidia all alike 



(a) Conidia produced in the hyphae Sporendonema 10:515 



(b) Conidia produced on the hyphae 



X. Fertile hyphae spirally twisted, forming a head of conidia 



Helicocephalum 10:512 

 y. Fertile hyphae not twisted 



(x) Fertile hyphae simple, not branched at tip 

 m. Chains of conidia lateral Dematium 4:308 



n. Chains terminal 



(m) Conidia without isthmi Catenularia 4:303 

 (n) Conidia connected by cylindric isthmi 



Prophytroma 4:309 

 (y) Fertile hyphae branched 

 m. Hyphae dendroid Hormodendrum 4:310 



n. Hyphae capitate branched at tip 



Haplographium 4: 304 



b. Some sterile hyphae erect and mixed with the fertile 



Hormiactella 4:311 



II. Conidia hyaline or subhyaline 



I. Conidia acrogenous on short heteromorphic basidia at the lower part or at the 

 base of erect hyphae 



a. Conidia capitate glomerate 



(i) Sterile hyphae simple and circinate at apex 



Bolacotricha 4:316 



(2) Sterile hyphae much branched below 



Myxotrichum 4:317 



b. Conidia not capitate 

 (l) Conidia solitary 



(a) Erumpent ; conidia fusoid, usually setose 



EUisiella 4:315 



(b) Superficial 



X. Sterile hyphae simple 



(x) Conidia globose Botryotrichum 4: 313 



(y) Conidia bacillar 

 m. Sterile hyphae tortuous Sarcopodium 4:312 



n. Sterile hyphae circinate at apex 



Helicotrichum 4:313 

 y. Sterile hyphae branched 



(x) Hyphae irregularly branched; basidia verticillate 



Costantinella 16: 1054 

 (y) Hyphae repeatedly dichotomous 



