460 Bulletin 315 



Hab. Isolated from soil of plant-breeding experimental plats, Ithaca, 

 N. Y., by the writer, in November, 1910; also by Hagem in Norway. 

 Plant pathology herbarium No. 5,902. 



Mucor sphaerosporus Hagem, Untersuch. ii. Norw. Mucorineen i: 22- 

 24. fig. 4. 1908; reprint from Vid.-Selsk. Skr. I, Math.-Naturv. Klasse 

 No. 7, 1907. Lendner, Les Mucorinees de la Suisse, 92. 1908. 



Colonies yellow-brown or brown; sporangiophores of very different 

 height, partly short only 1-2 mm. high, partly up to i cm. high; the latter, 

 however, frequently scattered or united in clusters, at first erect, soon, 

 however, especially in the upper half, sinking down, richly monopodially 

 branched with long, repeatedly branched branches; sporangia globose, 

 70-1 loju in diameter, yellow-brown, with easily dissolving wall; columella 

 ovate, toward the base somewhat attenuated, 40-65^ high by 30-55^ 

 broad, with mostly weak yellow-brown thick membrane; spores globose, 

 variable in size even in the same culture, io(6-8)/i in diameter, solitary 

 or in mass slightly yellow; chlamydospores in the sporangiophores with 

 a large central oil drop; zygospores unknown. 



Hab. Isolated from soil, Christiania, Nor\\'-ay, Hagem. 



Mucor dimorphosporus Lendner, Bui. Herb. Boissier 8: — . 1908; Les 

 Mucorinees de la Suisse, 93-94. fig. 34. 1908. 



Colonies on wort-gelatin grayish, attaining a height of 2 cm. above the 

 substratum; sympodially branched sporangiophores straight, 2 cm. long, 

 12/X thick. Near the substratum are found other sporangiophores that 

 are wavy and even circinate, carrying much smaller sporangia. Normal 

 sporangia spherical, maximum 8o)u, often wider than high, mean 60/x wide 

 by 58/i high; membrane diffluent; spores ordinarily globose, 8-io/i in 

 diameter, often also oval 6 by 8^t or 8 by lo/x, hyaline or light yellowish, 

 brilliant. Abnormal spores measure up to 30/x long by 8-io/x wide, very 

 irregular; eoliimella often much larger toward the basal part, 20 by 24/i 

 to 40 by 50/x, oval, surrounded by a collarette; chlamydospores ovoid. 

 Zygospores unknown. 



Hab. Soil of the Janssen Cabin, summit of Mt. Blanc, 4,810 m., 

 summer 1906, Lendner. 



Mucor geophilus Oudemans, Arch. Neerl. Sci. Nat. ser. 2, 7: 278. 

 P^- 5- fi^- ^- 1902. Lendner, Les Mucorinees de la Suisse, 97. 1908. 



Colonies at first white, later grayish, and finalh' dilute olive; vegetative 

 hyphas dichotomously branched, continuous, dilute olive, with hom.og- 

 enous protoplasm; fertile h3'phae concolorous, at first simple, then passing 

 to cymose-branched, branches usually few (2-3), continuous; sporangia 

 globose, at first yellowish, afterAvard olive, dissolves leaving a basal collar, 

 50-3 50iu in diameter, spiny; columella exactly spherical, large, ver}' dilute 

 fuliginous; spores plurifonn. globose, angular, or ellipsoidal, 4. 2-6. 5// in 



