456 Bulletin 315 



rangia, however, always oval or ovate with somewhat smaller base, 75-iio/i 

 high by 60-90^ broad; spores are rather uniform in shape, mostly oval 

 or ellipsoidal, seldom cylindrical, occasionally somewhat flattened or 

 curved, twice as long as broad, very variable in size, 5-12 by 3-6/i (mostly 

 9-10 by 4-5 m)- There occur besides also in the cultures globose spores 

 4-5/x in diameter; zygospores not observed. 



Hab. Isolated from forest soil near Christiania, Norway, Hagem; 

 Switzerland, Lendner. 



Mucor genevensis Lendner, Bui. Herb. Boissier No. 1,8: — . 1908; Les 

 Mucorin6es de la Suisse, 80-82. fig. 27. 1908. Hagem, Neue Unter- 

 such. xi. Norw. Mucorineen. Ann. Myc. 8: 275-277. ^g. 7. 1910. 



Colonies with rich or sparse formation of sporangiophores ; sporangi- 

 ophores erect, monopodially branched with longer or shorter side branches, 

 rather thin, 8-1 5/x thick, usually 1-2 cm. high, ending in sporangia. 

 Sporangial membrane easily dissolving in water, usually there remains 

 on the columella an irregular basal collar. Columella colorless, hyaline, 

 either more or less spherical or also oval to obovate, 20-40^1 high, 20-35^ 

 broad. Spores small, ellipsoidal, usually twice as long as broad, (4-) 

 5-7(-9-io)/x long and (2-) 2. 5-3. 5 (-4) m broad, almost hyaline. 



Homothallic; zygospores produced between especially low (i mm. 

 high) zygophores. Suspensors as well as gametic cells almost of the same 

 size and form, or slightly different. Zygospores spherical or laterally 

 somewhat compressed; immature ones yellow-brown, transparent, mature 

 ones black and opaque with rather high, starlike, thickened tubercles 

 (6o-)7o-9o(-ioo)m high and (45-)6o-7o(-9o)m wide. 



Hab. Found in Norway but once. Isolated from the soil of a fir wood 

 in the neighborhood of Hauersaeter railroad station, Hagem; by Lendner 

 in neighborhood of Geneva, Switzerland, from soil. 



This species claims an especial interest because of the monoecious nature 

 of its mycelium. The zygospores are always richly developed in cultiire. 

 Hagem established this by repeated cultures from a single spore. 



Cymo-mucor 



Mucor botryoides Lendner, Nouvelles Contributions a la Fl. Crypt. 

 Suisse. Bui. Soc. Bot. Geneve ser. 2, 2: jg-Si. fig. 4. 1910. 



Sporangiophores nonerect, incurved, forming a cobwebby network, 

 attaining 1.5 cm. in height, not varying far from 16 to 2 Oju in diameter, 

 ending in a large sporangium and producing at a short distance below the 

 sporangium more or less closely clustered branches that are terminated by 

 sporangia; secondary branches are sometimes dichotomous or sometimes 

 in sympodia; sporangia globose, clear gray, with membrane of the large as 

 well as the small sporangia diffluent in water, average size of the terminal 



