[Vol. 1 

 198 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



1. Basidia cruciate as in Tremellodendron; fructification effuso-reflexed or cup- 

 shaped with the margin free Hirneolina 



1. Basidia cruciate as in Tremellodendron; fructification always resupinate . *Se&aana 

 1. Basidia simple but with such large sterigmata as to resemble longitudinally 



divided basidia^ Tulasnella 



1. Basidia at first globose and simple, at length elongated and transversely sep- 

 tate, straight or curved, bearing sterigmata on the convex side; fructification 



resupinate Septohasidium 



1. Basidia simple, usually 4-spored 2 



2. Spores colored; fructification pileate Thelephora 



2. Spores colored, rough-walled to echinulate; fructification resupinate. .... 



HypochniLs 

 2. Spores ochraceous, ferruginous or fuscous, even; fructification resupinate . . 



Coniophora 



2. Spores white or rarely bright colored, even or rarely uneven 3 



3. Setae (brown, cylindric, rigid, even-walled bodies) present in the hymenium; 



fructifications range from pileate to resupinate Hymenochoete 



3. Cylindric teeth composed of many consolidated hyphse protrude from the 

 hymenium but are not covered by it. Our southern species was originally 



described as a Hydnum Mycohonia 



3. Neither setse nor teeth present in the hymenium 4 



4. Fructification coriaceous, erect, clavariform; stem often hairy . . Lachnocladium 

 4. Fructification cup-shaped, resupinate with free margin or simply resupi- 

 nate; hymenium pulverulent; with some two or three of the following 

 characters: (1) large white spores ranging from 14-34 x 12-20 m 5 (2) much 

 granular matter in the fructification; (3) prominent moniliform or 

 y' branched paraphyses; (4) racemose organs in the hymenium which pro- 

 duce a crop of conidia before basidiospores develop Aleurodiscus 



4. Fructification pileate ranging from infundibuliform and flabelliform to 

 very narrowly reflexed forms; hymenium even. Some reflexed species 



may occur resupinate Stereum 



4. FructificatioD like that of an urn-shaped Stereum but hard and stuffed. 



One tropical species Hypolyasus 



4. Fructification like that of Stereum but with the hymenium hardened and 



with radiating branched ribs. Species tropical Cladoderris 



4. Fructification always resupinate; structure not as in Aleurodiscus 5 



5.\^Subhymenial tissue contains conspicuous brown stellate organs composed of 



several radiating arms Asterostroma 



5. Such brown stellate organs not present 6 



6. Cystidia present in hymenium, or in subhymenial tissue, or in both; 



structure may be compact or hypochnoid Peniophora 



6. Cystidia not present; structure compact or hypochnoid Corticium 



i ^ With regard to the nature of these bodies see H. O. Juel, Bihang till K. Sv. Vet.-Akad. Handl. 

 23": Afd. III. 3-27. 1897. 



