APPENDIX VI 



701 



8. Columella spinescent. (9) 

 Columella smooth. (10) 



9. Sporangiophores never exceeding 2 mm., sporangia 60 to 8o/u, spores smooth 

 7 to 8^. 37 M. spinescens Lendner. 



Sporangiophores over i cm. and more tall, spores frequently punctate, 

 5 to 8m. 38 M. plumheus Bonorden. 



Fig. 242. — Mucor lam prosper us. a, b, c. Columella; d, sporangiole; e, sporangium; 

 /, branched sporangiophore. (After Lendner.) 



Sporangia 75 to 120/x, columella piriform or campanulate, spores 4 to 8m 



diameter. 39 M. globosus Fischer. 



Sporangia ordinarily smaller {iion maximum), columella spheric, oval or 



campanulate. Spores larger lo^ (mean). Species with sporangioles near 



the substratum. (11) 



Sporangia 70 to nop diameter, sporangioles not caducous, spores spheric, 



shining, lo^. 40 M. spharosporus Hagem. 



Sporangia never exceeding 80 to 90/1, spores lo^. 



