444 Bulletin 315 



Homothallic ; zygophores arise comparatively close together, almost 

 invariably originating from a single aerial hypha, usually unequal 

 Zygorrhynchus 



Absidia 



Absidia Orchidis (Vuill.) Hagem, Untersuch. ii. Norw. Mucorineen i : 

 40-43. figs. 16-18. 190S; reprint from Vid.-Selsk. Skr. I, Math. -Naturv. 

 Klasse No. 7, 1907. Lendner, Les Mucorinees de la Suisse, 138-140. 



fig. jo. 1908. 



Syn. Tieghemetta Orchidis Vuill., Bui. Soc. Myc. France 19: 1 19-126. 1903. 



This fungus varies somewhat with the substratum; stolons of different 

 sizes, depending on the concentration of the medium ; on rich substratum 

 very strongly and richly branched; on poorer, forming shorter and only 

 solitary new stolons; sporangiophores mostly two together, occasionally 

 3-4-5, always with a septum 10-20^ below the sporangium; sporangia 

 3 5-60/i high and broad (without consideration of apophysis) ; columella 

 hemispherical to conical, seated on the apophysis, without the apophysis 

 measuring 20-40/1 high and broad, or occasionally 5 ju broader than high; 

 spores globose, 2. 5-3. 5 m diameter, in mass weak yellow or with a trace 

 of brown. 



Heterothallic ; zygospores globose (8o-)ioo-i2o(-i5o)/x in diameter; 

 exospore with warty, starlike thickenings; suspensors fonned by the 

 stolons, with a circle of 10-14 one-celled, frequently brown appendages 

 that interweave with those of the opposite side and surround the Z3^gospore. 



Hab. Isolated frequently from forest and meadow, and garden soil 

 near Christiania, Norway, Hagem. 



Absidia glauca Hagem, Untersuch. li. Norw. Mucorineen i: 43-45. figs. 

 iQ-20. 1908; reprint from Vid.-Selsk. Skr. I, Math. -Naturv. Klasse No. 7, 

 1907. Lendner, Les Mucorinees de la Suisse, 136-138.^^5. 45'-4p. 1908. 



Colonies at first white, soon, however, more or less bluish green; stolons 

 of the first order very low and slightly bent, up to several centimeters 

 long, up to 25-30JU thick, ending for the major part with few rhizoids, 

 producing short (i-)2(-3) new stolons, blue-green, those of the last 

 orders frequently strongly bent; sporangiophores straight, erect, mostly 

 two together, occasionally also several, ioo-600/x high, 5-10/^ thick, fre- 

 quently producing one or two side branches, which are again branched. 

 Also occasionally instead of a branch a new stolon is formed, always 

 with a septum close to the sporangium; sporangium together with the 

 apophysis pyrifonn, with easily dissolving wall; columella hemispherical, 

 mostly without but occasionally also with a short, thick process, without 

 apophysis 20-30^1 high by 25-35^1 broad; spores very small, globose, 

 2. 5-3. 5 /i in diameter, in mass yellowish. 



