Classification . 8 7 



branched, often transversely septate ; sporangium 

 globose or subglobose, columella present j sexual 

 branches straight. 



Mucor, Mich. Nov. Gen. Plant, p. 215 ; Sacc. Syll. 

 vii. p. 190. 



The species of Mucor usually form a more or less 

 dense vegetative layer of mycelium, the hyjohasma, on 

 putrid or decaying organic matter. The sporangi- 

 ferous hyphae are erect, and the sporangium usually 

 globose. Zygospores are comparatively rare, and in 

 most species are up to the present unknown. 

 A. Sporcmgia coloured at maturity, 



Mucor miicedOf Linn. 



Sporangiferous hyphas simple, erect, dirty yellow or 

 brownish, sporangia spherical, minute, yellowish or 

 greenish-grey, dusky brown when dry, very minutely 

 rough j columella ovoid, yellowish-brown ; spores 

 elliptical, 6-9 x 3-4 fju, tinged yellow ; zygospore 

 spherical, epispore black, with large irregular pro- 

 tuberances, 99-214 fi, / 



Mucor mucedo, Linn. Sp. pi. ii. 1655 ; Sacc. Syll. 

 vii. n. 615; Cke. Hdbk. n. 1884. 



On various decaying organic substances, as fruit, 

 paste, preserves, &c., also on dung. Common. Stem 

 i — 1 in. long, very slender, at length collapsing. 



Yar. caninus. 

 Sporangiferous hyphse simple, whitish, elongated, 

 lax, erect ; sporangium spherical, at first yellow, then 

 blackish-brown, minute, columella globose, yellowish ; 

 spores elliptical or elliptic-ovoid, 7-13 x 8-9 //-, sub- 

 hyaline. 



