36 SPIROGYRALES 



b. Sporangiophores creeping, branches terete Herpocladium 7:225; S 130, 



F 268 

 2. Sporangia arising from a stout creeping hypha 



as buds behind the tip Dissophora F 268 



B. Sporangia represented by 1-2-spored sporangioles 

 borne terminally and sometimes laterally also 

 on short branches from fertile intercalary seg- 

 ments of the mycelium Haplosporangium F 268 



Subfamily Choanophorae 



A. Sporangia present, together with sporangioles or 



conidia 



1. Sporangioles present, conidia lacking; spores 



striate lengthwise Blakeslea F 259 



2. Conidia present, sporangioles lacking; conidia 



striate lengthwise Choanophora F 261; 2 



B. Sporangia and sporangioles lacking; conidia pres- 



ent, echinulate Cunninghamella F 263 



Subfamily Syncephalidae 



A. Sporangiophores ramose 



1. Branching more or less dichotomous 



a. Some branches sterile, prong-like; sporangif- 



erous heads not deciduous Dispira F 270 



b. All branches fertile; sporangiferous heads 



deciduous Piptocephalis 7:225; S 132, 



F 272; 2 



2. Branching not dichotomous, but cymose or in- 



definite; sporangiferous heads not deciduous Syncephalastrum 7:232, S 134; 



F 273; 2 



B. Sporangiophores not ramose below the apical 



vesicle, provided with spur-like rhizoids Syncephalis 7:227; S 132, F 273; 



2 



Subfamily Chaetocladiae 



One genus Chaetocladium 7:220; S 131, 



F 257; 2 



Family 5. ENDOGONACEAE 



Sporocarps more or less globose or irregular in shape, with a hyphal tomen- 

 tum or pseudoperidium, sometimes reduced to a nearly naked sorus; producing 

 zygospores or azygospores (chlamydospores) and sometimes in Endogone, 

 sporangia; hypogean or epigean saprophytes. 



This is a small group of somewhat doubtful relationship, but regarded by recent 

 workers as exhibiting affinity to the Mortierellae. 



A. Pseudoperidium composed of bundles of hyphae 



radiating from the surface Sohaerocreas 4:679; F 267 



B. Pseudoperidium not composed of radiating hyphal 



bundles 

 1. Sporocarps hollow; spores arranged irregularly 



in the wall Glaziella 2:581; F 267 



