412 THE FUNGI WHICH CAUSE PLANT DISEASE 



S. pedicillata (Schw.) Pat.«" 



Resupinate, effused, byssoid, subcompact, light cinnamon- 

 yellow to white, hymenium smooth. 

 On oak, palmetto, tupelo, apple, etc. Cosmopolitan. 



Clavariaceae (p. 402) 



HjTnenophore fleshy, leathery, cartilaginous or waxy, cylin- 

 dric-clavate, simple or branched often quite large and conspicuoiis 

 hymenium with cystidia; basidia clavate, with 1 to 4 sterigmata; 

 spores elliptic or fusiform, hyaline. 



There are about five hundred species. One genus only is para- 

 sitic. 



Key to Geneba of Clavariaceae 



H}anenophoFe small, simple 

 Basidia with 1 or 2 sterigmata 



Spores colored 1. Baumaimiella. 



Spores hyaline -t- 



Hymenophore expanded aboVe into a 



cap, basidia with 1 sterigma. . . .'' 2. Glceocephala. 

 Hymenophore clavate, basidia with 



2 sterigmata 3. Pistillaria. 



Basidia with 4 sterigmata 



Hymenophore clavate or filiform. ... 4. Typhula, p. 412. 



Hymenophore capitate, hollow 5. Physalacria. 



Hymenophore usually large, branched, 

 rarely simple 

 Hjrmenophore mostly round, branches 

 never leaf-like 



Hjonenophore fleshy 6. Clavaria. 



Hjrmenophore not fleshy 

 Hymenophore cartilaginous or homy. 7. Ptenila. 

 Hjrmenophore leathery and hairy .. . 8. Lachnocladium. 

 Hymenophore leaf-like 9. Sparassis. 



Typhula gra m inum Karst. has been reported as injuring wheat. 



Hymenophore fleshy or waxy, delicate, simple or rarely branched, 

 filiform or cylindric, clavate; spores colorless. Sometimes forming 

 sclerotia. Fig. 297. 



T. variabilis Riess. is regarded as a parasite of beets. 



