[From the Bulletin of the Torkey Botanical Club, 31 : 593-610. November, 1904 



The Polyporaceae of North America— IX. Inonotus, Sesia and 



monotypic genera 



William A. Murrill 



Continuing the work begun in article VIII of this series upon 

 colored sessile forms, an attempt is here matie to treat in their 

 proper relations plants with brown context and spores, constituting 

 the genus Inonotus, and plants with brown context, hyaline spores 

 and daedaleoid or lamelloid tubes, constituting the genus Sesia. 

 A few genera are also added that contain only a single species each. 



Inonotus Karst. Medd. Soc. Faun, et Fl. 

 Fenn. 5: 39. 1879 



Inoderma Karst. Medd. Soc. Faun, et Fl. Fenn. 5 : 39. 1879. 



Inodermus Quel. Ench. 173. 1886. 



This genus was based upon four species, /. cutiailaris (Bull.), 

 /. hispidus (Bull.), /. unicolor (Schw.) and /. hvpococcinns (Berk.). 

 The two last can hardly be considered congeners of the first. The 

 type species is I. cutiailaris, not found in America. Karsten in 

 later publications included also /. fibrillosus, 1. vulpinus, I. tri- 

 quctcr, I radiatus and /. nidulans in the genus, although some 

 of them have hyaline spores. These he divided into two groups, 

 one in which the pileus is spongy-fleshy and anoderm and the 

 other containing species with a dry, thin, fibrous cuticle. To the 

 first group, such species as /. cuticularis and /. hispidus belonged, 

 while /. radiatus and /. fibrillosus were in the second group. 



This second group at first constituted the genus Inoderma 

 of Karsten, but the name is untenable, because preoccupied by 

 Inoderma of S. F. Gray for a genus of lichens. Quelet's genus 

 Inodermus was not only preoccupied so far as the name was con- 

 cerned,, but was founded upon /. hispidus (Bull.), one of the orig- 

 inal typical species of Inonotus Karst. The species here included 

 in the genus Inonotus are brown, sessile, usually anoderm, with 

 fibrous context and brown-tinted spores. There is considerable 

 variation in spore coloration, the spores of some species being 



593 



