I Vol. 1 

 198 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



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

 shaped with tlie margin free Hirneolina 



1. Basidia cruciate as in Trtnuilodendron; fructification always resupinate. Se?>acma 

 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 Septobasidium 



1. Basidia simple, usuallj- 4-spored 2 



2. Spores colored; fructification pileate Thelephora 



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



Hypochnus 

 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 hjTnenium; 



fructifications range from pileate to resupinate H ymenochaele 



3. Cylindiic teeth composed of many consohdated hypha; protrude from the 

 hj-menium but are not covered by it. Our southern species was originally 



described as a Hydnum Mycohonia 



3. Neither setae nor teeth present in the hj-menium 4 



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

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

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

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

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

 branched paraphyses; (4) racemose organs in the hjonenium 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. Fructification like that of an urn-shaped Stereum but hard and stuffed. 



One tropical species Hypolyssus 



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. 2^Subhy menial tissue contains conspicuous brown stellate organs composed of 



several radiating arms Asterostroma 



5. Such brown stellate organs not present 6 



6. Cj^stidia present in hymenium, or in subhymenial tissue, or in both; 



structure may be compact or hj-pochnoid Peniophora 



6. Cj'stidia not present; structure compact or hypochnoid Corticium 



? > 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. 



