IOWA ACADEMY OF SCIENCE 
21 
16. Polyporus fissus Berk. 
A very large and conspicuous species which has been collected but once in 
the vicinity of Payette. The specimens were growing on a badly decayed log, 
probably elm. 
17. Geieola frondosa (Dicks.) S. P. Gray. {Polyporus frondosus Fries). 
A very beautiful species which has been collected once in humis at the base 
of an oak, near Payette. 
18. Pycnoporus cinnabaeinus (Jacq.) Karst. {Trametes cinnabarina Fries, 
Polystictus cinnabarinus Pries). 
A very conspicuous species easily recognized by its bright color. Fairly 
abundant on fallen wild cherry. 
19. Laetipoeus speciosus (Batt.) Murrill-. {Polyporus sulphurous Fries, P. 
cincinnatus Morgan). 
Quite common on various living and dead trees, especially oak, ash, and wild 
cherry. This is the only edible species of the family, at least in so far as 
local flora is concerned. 
20. Fun ALIA stuppea (Berk.) Murrill. {Trametes PecTcii Klachb). 
A very distinct species, easily recognized by its hirsute pileus and large 
very irregular pores. Not uncommon on poplar. 
21. Hapalopilus gilvus (Schw.) Murrill. {Polyporus gilvus Schw). 
A very common and rather constant species which is easily recognized by 
its Arm sporophore which is of a yellovv^ish or brownish tint. The individual 
sporophores are either scattered or imbricate and are produced in great 
abundance, much to the injury of our forests. The worst sufferer from its 
depridations is the oak. Various other trees are infected to a certain extent, 
among these being the cultivated cherry. 
22. Ischnodeema fulginosus (Scop.) Murrill. {Polyporus resinosus Pries). 
Common on dead wood, especially of the linden and red maple. 
23. Pomes roseus (Alb. &. Schw.) Cooke. 
On structural pine, Clermont, (C. D. Learn.) The rose colored sporophore 
easily distinguishes this from our other species. 
24. Pomes feaxineus (Bull.) Cooke. 
Not common on Fraxinus. Collected at Clermont and Fayette by C. D. 
Learn. 
25. POMES’ ohiensis (Berk.) Murrill. {Trametes ohiensis Berk). 
Rare on oak posts. 
26. Pomes populinus (Schum.) Cooke. 
This species does not appear to be very common as it has been collected 
only two or three times. It is parasitic on Acer skccharinum and A. saccharum. 
27. Pyropolyporus ignarius (L.) Murrill. {Pomes ignarius Gill., F. nigri- 
cans Gill). 
This is one of our commonest and most variable species of pasitic polypores. 
It causes no end of damage to certain of our forest trees. Two forms are 
recognizable; the first, or typical form, has the hymenium brown, the surface 
less rimose than in the second, and is more broadly shelving in habit; the 
other form being narrower and more nearly hoof-shaped, with a bluish hyme- 
nium. This is Fomes nigricans, which upon first acquaintance appears distinct 
enough to warrant its recognition as a distinct species. A collection made by 
