358 MuRkiLL : Polyporaceae of North America 



The type of this species at Kew is very old and partially de- 

 stroyed by insects, so that little can be known of the plant until 

 new collections are made in the type locality. 



6. Coriolopsis gen. nov. 



Type : Polyporus occidentalis Kl. Linnaea 8 : 486. 1833. 



Hymenophore thin, flexible or rigid, annual, epixylous, sessile, 

 dimidiate, often largely resupinate ; surface light-brown, zonate, 

 anoderm, hairy, margin thin : context thin, coriaceous to woody, 

 pale ferruginous, sometimes almost white ; hymenium concolorous, 

 tubes small, regular, thin-walled, entire : spores smooth, hyaline. 



Synopsis of the North American species. 



1. Pores conspicuous. 2. 

 Pores inconspicuous, pileus papery, thin, very flexible. 



I. C. crocata. 



2. Pores yellowish-brown, pileus usually rather thick and firm. 



2. C. occidentalis. 



3. Pores white or pallid, pileus thin, often narrowly reflexed or entirely resupinate. 



3. C. gibbjsrulosa. 



i. Coriolopsis crocata (Fr.) 



Polyporus crocatus Fr. Epicr. 477. 1836-38. 



Polyporus byrsinus Mont. PI. Cell. Cuba 391. pi. ij. f.j. 1842. 



Polystictus crocatus Fr. Nov. Symb. 91. 185 I. 



Described originally from plants collected on trunks in Mexico 

 by Liebmann. Confused with C. occidentalis by many, but plainly 

 distinct. The species has until recently been but sparingly col- 

 lected in tropical America, as the following specimens at hand will 

 indicate. 



Colombia, Baker; Nicaragua, Wright 237, Smith; Mexico, 

 Smith; Cuba, Wright jo6 J U ; Underwood & Edrle ij8o, Earle & 

 Murrill 121, 123, 237, jji, jyp, 499, 644. 



2. Coriolopsis occidentalis (Kl.) 



Polyporus occidentalis Kl. Linnaea 8 : 486. 1833. 

 Polyporus leuis Lev. Ann. Sci. Nat. Bot. III. 9 : 123. 1848. 

 Polystictus cyclodcs Fr. Nov. Symb. 90. 1851. 



This species was first described from plants in Hooker's her- 

 barium, collected on trunks in the island of St. Vincent by Guild- 

 ing. Polyporus lenis was assigned to specimens collected on 



