KEY TO THE GENERA OF FAMILY CLAVARIACEAE 513 



Hymenium in the form of radiating, sometimes reticulate, ridges or folds or as 

 obtuse, forked lamellae. Cantharellus (Gomphus) 



Fruit body very thin and delicate, stipe small or rudimentary. 

 Spores hyaUne. Leptotus (Dichjolus) 



Spores tawny to incarnate. Arrhenia 



Key to the Genera of Family Clavariaceae 



(Based on Doty, 1948) 



Spores hyaline (rarely tinted), mostly smooth and thin- walled; basidia two- or 

 four-spored. 

 Fructification with broad, flattened terminal portions of the branches (probably 



better in Family Thelephoraceae). Sparassis 



Fructification not as above. 



Spores large (7 fx or over), globose; basidia two-spored; hymenium white or 

 gray; not staining green with Fe2S04 solution. 



Clavulina 

 Spores distinctly smaller or ellipsoid; basidia typically four-spored if spores 

 spherical; hymenium often colored otherwise or staining 

 green with Fe?S04 solution. 

 With stout hyphae in the trama producing setae or gloeocystidia in the 

 hymenium or subhymenium, or the apices of the branches 

 truncate or cup-shaped; spores under 8 ju long; not staining 

 green with Fe2S04 solution. 

 Apices of some branches truncate to cup-shaped, with gloeocystidia in 



the hymenium layer. Clavicorona 



Apices of branches acute; with strong setae in the hymenium or sub- 

 hymenium. 

 Setae loosely dichotomously branched (dichophyses). 



Eriodadus 

 (Lachnocladiu m ) 

 Setae closely dichotomously branched (asterophyses). 



Stelligera 

 Without such hyphae or apices; spores various; or staining green with 

 Fe2S04 solution. 

 Fructifications branched. 



Very finely branched (under 1 mm.) ; toughish. Pterula 



Branches larger; flesh fragile or putrescent. 



Hymenium staining green with Fe2'^04 solution. Clavariella 

 Hymenium not staining green with Fe2S04 solution. 



Clavaria 

 Fructifications simple or rarely branched above. 



Fructifications enlarged above or over 1 cm. in diameter above; spores 

 ellipsoid. 

 Minute (not over 5 mm. tall) ; or with an abruptly inflated head ; not 

 staining green with Fe2S04 solution. 

 With an inflated, down-turned head. Physalacria 



With the apex merely enlarged. 



Hymenium on the expanded blunt apex. Pistillina 



Hymenium on the sides of the club. Pistillaria 



Large (over 2 cm. tall); or turning green with Fe2S04 solution. 



Clavariadelphus 



