THE FLORA OF NEBRA8B L - , 



4. IIYIHtOI.I |{\ Wiggebs PI. Holsat. L10. L780. 



Sporangiophores simple, arising singly from swellings in the mycelium col. - 

 less or orange, above expanding into a large ellipsoid swellin 

 hemispherical or lens-shaped, many-spored; the membrane ai 

 andcuticulanzed,the Lower half quickly disappearing and leavii • 



upper part resting on the conical < tmella; both al maturity thrown off 



by tension of the terminal awelling of the sporangiophore; zygos, 

 naked, borne on ton- shaped branches. 

 Etymology: Greek wty>, water, and Latin gero, to carry. 



Hydrogera obliqaa (Scop.) ok. Rev. Gen. 855. L891, 

 Mucor obliquus Scopoli Plor. Carniol. II.. 194 [772. 

 Hi/drogera crystal /inn Wiggebs 1. c. 



Pilobolus crystallinus Tode Schrift. Naturf. Preund Ber] V 16 1784 ,r 

 Fischer). 

 Sporangiophores arising singly from a bladder-like swelling of the mycelium 

 5-10 mm. long, the terminal swellin- ellipsoid or ovoid, B5 L30x.60 - J . 



mm.; sporangia plano-convex, resting on the si« f the terminal swelling 



300-400x100-150 fi; columella conical; spores elliptical 5 10x3 6 color 

 less, but in mass greenish yellow. 

 On dung, on ground in greenhouse, not uncommon. PI. XIV . Fig. :,. a . 

 [Mortierella has a distinct fertile mycelium from which the sporangiophorea arise 

 singly or in groups, the bases being enveloped in a mass of short branches 

 The sporangia are many-spored and have no columella, The zygospores 

 are covered with a dense mass of hyphae, which branch off from the 

 suspensor-cells and the branches from whirl, the latter arise. V. ,„,/,, 

 cephala Coemans, distinguished among other thinga by ita branched 



sporangiophores, grows on dung and on decaying pore fungi It has I „ 



reported from the United States, and should be found here.] 



Subfam.— Chaetocladieae.— Asexual reproduction by conidia whirl, are borne 



singly (i. e., not in chains) in groups on the swollen middle portion of 

 branches of the conidiophores, the ends of which are sterile. 

 Through the Thamnidieae, one of the tribes of the If ucoreae, nol represei 

 in our flora, this group is connected with the Eumua grada 



tions shown by other forms and produced by cultivation make it reason 

 ably certain that the conidia are to be regarded aa reduced one ■ 

 sporangia. 



5. OHAETOCLADIIII Fbesenius Beitraege97. 1853. 



Parasitic upon other Mucoraceae, mycelium thin, colorless, forming olustera 



of short, thick haustoria at the poinl of attachment with the hyp!. 

 the host; sporangiophores creeping, verticillately branched, ending in a 

 long, sterile, pointed tip, the branches short with sterile tips, bearii 

 the swollen portion large numbers of single oonidia, 



Etymology: Greek \nirr;, hair, and .' 6 a , branch 



Chaetocladinm ItrHWriii Van Tiegh. I LeMon. Ann. Be. Nat. i;,.t ;,. \vn 

 342. is;:;. 

 Characters of the genus; conidia globose or globose elliptical, smooth, color- 

 less, 2 5 //. 



