36 



THE SLIME-MOULDS OF PENNSYLVANIA 



By D. R. Sumstine 



Of the 200 or more species of slime-moulds recognized in the 

 United States, 103 or about one half have been reported from 

 Pennsylvania. No doubt this number will be largely increased 

 when the state is thoroughly explored. 



The following list is necessarily incomplete but it provides a 

 basis for future investigation of this interesting flora. 

 Arcyt'ia cincrca (Bull.) Pers.* Cratcriuin Iciicoccplialniii (Pers.) 



demidata (L.) Sheld.* 



digitata (Schw.) Rost.t 



incarnata Pers.* 



incarnata nodulosa Macbr.f 



magna Rex X 



nutans (Bull.) Grev.* 



Ocrshdtii Rost.t 

 Badhaniia dccipicns (Curt.) 

 Berk.t 



lilacina (Fr.) Rost.f 



viacrocarpa (Ces.) Rost.f 



orbicidata Rex ;j; 



papaveracca B. & R.f 

 Brefclda maxima (Fr.) Rost,* 

 Clastodcrma Dcbaryaniim 



Blytt.t 

 Comatriclia acqualis Peck f 



longa Peck f 



nigra (Pers.) Schroet.f 



Persoonii Rost.t 



pulchclla {\\?Lh>i Ro.st.f 

 Crater ium aurcum (Schum.) 

 Ro.st.t 



Ditm.f 

 Crihraria argillacca Pers.f 

 aurantiaca Sch rad . * 

 dictydioides Cke. & Balf.f 

 elegans B. & C.f 

 intricata (Schrad.) Rost.f 

 m icrocarpa (Schrad.) 



Pers.f 

 minutissim a S c h w . f 

 purpurea Schrad. f 

 toiclla Schrad. f 

 violacea Rex || 

 Diaclica leucopoda (Bull.) Rost.* 



spUndens Peck f 

 Dictydiaetlialium plumbeum 



(Schum.) List.* 

 Dictydium cancellatum (Batsch) 



Macbr.* 

 Didcrma cinereum Morg.f 

 crustaceum Peck* 

 reticulatum (Rost.) 



Morg.f 

 stellare (Schrad.) Pers.f 



* Specimen in the writer's herbarium, 



I Macbride, North American .Slime Moulds. 

 X Proc. Acad. Nat. Sci. Philadelphia, 1893. 

 g Proc. Acad. Nat. Sci. I'hiJadelphia, 1891. 



II Proc. Acad. Nat. Sci. Philadelphia, 1889. 

 *! Proc. Acad. Nat. Sci. Philadelphi.n, 189O. 



