142 



Mycologia 



Substrata: On dung of lion, horse, jaguar. • 

 Specimens examined: New York, Sumstine; Pennsylvania, 

 Sumstine. 



Illustrations: Van Tieghem & Le Monnier, /. c. pi. 21, 

 f. i8-2s; Bainier, £tude, pi. 6, f. Bainier, Bull. Soc. Myc. 



Fr. pi. y, f. 10. 



10. Thamnidium Link, Ges. Naturf. Freunde 

 Berl. Mag. 3:31. 1809 



Original description : Sporangium globosum. Stipes tubu- 

 losus, septatus, basi ramosissimus, ramorum apicibus sporidia 

 nuda sustentantibus. Hoc genere series quae a Mucedinibus in- 

 cipiebat, iterum ad Mucedines redit. Sporangium mucoris, peri- 

 dio tenuissimo, aqua adfusa rumpente et sporidia majuscula, 

 globosa effundente. 



Stipes Mucedinum basi quoque in ramis dichotomis vera Muce- 

 dinum sporidia nuda profert, ita ut revera ambigua sit planta. 



Type species, Thamnidiuip, elegans Link. 



Sporangiophores erect, terminated by a sporangium, with 

 several dichotomously divided branches ; the terminal sporangia 

 many spored with columella ; sporangioles on the dichotomous 

 branches with few spores and without columella; zygospores 

 formed on the mycelium, naked, copulating branches straight. 



I. Thamnidium elegans Link, /. c. 1809 



Melidium subterraneum Eschweiler, De Fruc. Gen. Rhiz. 33. 

 1822. 



Mticor elegans Fries, Syst. Myc. 3 : 322. 1829. 

 Ascophora elegans Corda, Ic. Fung. 3 : 14. 1839. . 



This beautiful species is easily recognized by the two kinds of 

 sporangia and by the dichotomous branches. It is seldom re- 

 ported from this country. 



Bachmann (Bot. Zeit. 107. 1895) describes six different 

 typical forms cultivated on different substrata. 



Substrata : On dung of tiger and horse. 



Specimens examined : Pennsylvania, Sumstine. 



Illustrations: Link, /. c. pi. 2, f. 45; Eschweiler, /. c. pi. f. 10; 

 Corda, /. c. pi. 2, f. 4^; Bref. Bot. Unters. 9: pi. 2, f. 1-8; 

 Bainier, fitude, pi. 8, f. 1-5; Nees, Sys. der Pilze, pi. 6, f. 75. 



