45° Bulletin 315 



Sporangiophores 0.5-2 centimeters long, the longer noncircinate, the 

 shorter much branched and circinate, sporangia average 60/i, spores 

 average iO)u M. lamprosporus Lendner 



4. Membrane of the sporangium brown; sporangia often subsessile, spores 



oval or broad elliptical, 3-4 by 5-6/x. . .M. circinelloides van Tieghem 

 Sporangia supported by very long pedicels, often circinate 5 



5. Sporangia 6o-8ojix in diameter, spores 4-6 by 4/i . M. griseo-cyanus Hagem 

 Sporangia 50-60/i in diameter, spores 5-7 by 3. 5-5/* 



M. corticolus Hagem 



6. Spores globose 7 



Spores oval 10 



7. Species grows poorly on wort-gelatin, forms on bread a short aerial 



growth of 2-3 mm. high, sporangia 50-70/^ in diameter, spores 



globose, 5-6^1 M. Jansseni Lendner 



Species grows well on wort -gelatin and forms an aerial growth 1-3 

 centimeters high 8 



8. Columella spinescent M. plumheus Bonorden 



Columella smooth 9 



9. Sporangia 70-1 lo/x in diameter, sporangioles not caducous, spores 



globose, brilliant, lOju M. sphaerospoms Hagem 



Sporangia never exceeding 80 to 90/x, spores lO/u, sporangioles circinate, 



caducous, sporangiophores more elevated than with M. sphaerospoms 



M. lamprosporus Lendner 

 Sporangia 60-80//, spores normally 8-iofx, spherical or accompanied by 

 abnormal oval spores 8-10 by 30/^, no sporangioles 



M. dimorphosporus Lendner 



10. Sporangia 50-350/1, columella globose, spores globose or ellipsoidal or 



angular, 4. 2-6. 5 /x, chlamydospores M. geophilus Oudemans 



Sporangia variable, lead-gray, those of the shorter sporangiophores 

 45-180^1, columella oval or ovate, spores broad ellipsoidal, 4.5-10 

 by 3.5-7M usually 6.8 by 4.6/* M. satiirninus Hagem 



Mono-mucor 



Mucor Ramannianus Moller, Untersuch. ii. ein- und zwcijahr. Kiefem 

 im mark Landboden. Zeitsch. Forst- u. Jagdw. 25: 330. 1903. 

 Hagem, Untersuch. ii. Norw. Mucorineen i: 20-21. fig. 2. 1908; reprint 

 from Vid.-Selsk. Skr. I, Math.-Naturv. Klasse No. 7, 1907. Lendner, 

 Les Mucorinees de la Suisse, 62-63. ^^g- 2/. 1908. 



Colonies bright rose-red, very slow-growing; sporangiojAores low, 0.5-1 

 mm. high, either not at all or only slightly branched at the base, 1-3 

 septate with upper septum 1 5-20/1 below the sporangium; sporangia red, 

 with yellow spore mass visible through the membrane, 20-3 5/x in diameter; 



