THELEPHORACEAE 161 



A. Parasitic on algae 



1. Algae Chroococcus 



a. Algae in middle layer, medulla above and 



below Cora 6:685, Z 259 



b. Algae in upper layer, medulla below only Corella Z 261 



2. Algae Scytonema Dictyonema 6:687, Z 261 



B. Not parasitic on algae 



1. Pileus resupinate, effuse, rarely cupuloid when 



mature 



a. Pileus consisting of one layer 



(1) Spores hyaline 



(a) Basidia forming an even layer with the 



much branched paraphyses Asterostromella 21:381, K 142 



(b) Hymenial layer with projecting papillae 



or cystidia 

 X. Papillae present, of fascicled hyphae 

 (x) Papillae feathery Epithele 21:381, K 140 



(y) Papillae columnar, smooth or asper- 

 ate Bonia 11:123, K 140 

 y. Cystidia present, stellate or simple 

 (x) Cystidia stellate Asterostroma 9:236, K 140 

 (y) Cystidia simple 



m. Cystidia typically subulate Peniophora 6:640, K 138 



n. Cystidia spinose or short-branched, 



often blunt Aleurodiscus K 142 



(c) Cystidia lacking Corticium 6:603, K 136; 42 



(2) Spores dark 



(a) Cystidia present Coniophorella 17:183, K 141 



(b) Cystidia lacking Coniophora 6:647, K 140: 42 



b. Pileus consisting of several layers 



(1) Cystidia present, hyaline or dark Hymenochaete 6:588, K 144 



(2) Cystidia lacking Stereum 6:551, K 143; 42 



2. Pileus typically erect, funnelform, cupulate, 



terete or clavate, often stipitate 



a. Pileus leathery 



(1) Pileus urceolate, small, hard; hymenium 



smooth Hypolyssus 6:521; K 148 



(2) Pileus large, funnelform, flabelliform or 



clavaroid 



(a) Hymenium with ramose ribs; pileus 



funnelform Cladoderris 6:547, K 148 



(b) Hymenium smooth or roughened, not 



ribbed Thelephora 6:521, K 146; 42 



b. Pileus firm-fleshy or fleshy-gelatinous 



(1) Pileus clavate, margin involute; cystidia 



present Skepperia 6:603, K 148 



(2) Pileus scutellate to funnelform or clavate; 



cystidia lacking 



(a) Pileus scutellate; hymenium smooth Cytidia 21:380, K 142 



(b) Pileus funnelform to clavate; hymenium 



ribbed Craterellus 6:514, K 148; 42 



c. Pileus membranous, cupulate to cylindric 



(1) Pileus cupulate, single Cyphella 6:667, K 149 



(2) Pileus cylindric, cespitose Solenia 6:424, K 149; 42 



