Clavarias of the United States and Canada 15 



Plants branched and more bulky, branches usually numerous and the stem 

 not slender or very distinct 11 



1. Long, threadlike and pliable; occurring in large colonies among leaves 



Typhula (p. 200) 



1. Elongated and pliable, but not threadlike and often thickened upward, 

 with a large hollow and very thin flesh; spores about 8-18/* long 



C. fistulosa (p. 87) 



1. Club-shaped, usually much thickened upwards, simple or lobed, color 

 usually reddish tan or fleshy brown but varying to chocolate or (in 

 youth) rosy; flesh pure white, soft and spongy, thick, often hol- 

 lowed in age; spores ovate-elliptic or long-elliptic, about 9-18/* long.. 2 



1. Texture and habit varied, if hollow then the flesh thick in comparison; 



spores, if elongated, smaller (except in C. argillacca) 3 



2. Large and thick, growing in deciduous or mixed woods, spores ovate- 



elliptic, about 7-11/* long C. pistillaris (p. 83) 



2. Smaller, growing in needles or twigs of conifers ; spores long-elliptic, 



about 11-19/* long C. ligula (p. 86) 



3. Growing on decorticated, rotting logs that are covered with green algae ; 



very small.... C. mucida (p. 30) 



3. Growing on rotten logs or pure humus ; stem yellow and distinct from 



the club ; spores subspherical, about 5 x 6/* 



C. appalachiensis (p. 53) 

 3. Growing as a parasite on live mosses Eocronartium* 



3. Growing on earth or humus or as a saprophyte in moss.... 4 



4. Odor of garlic (onion), at least when crushed ; spores 4.4-6x8-10/* 



C. fuscata (p. 23) 



4. No odor of garlic. ~ 5 



5. About 2-5.5 cm. high, white or pale yellow, stem distinct from the club ; 



spores 4.5-6 x 8-10.5/* ~C. subfalcata (p. 21) 



5. Like C. subfalcata except for the narrower spores, which are 3.6-4 x 



7.4-10/*.... - C. gracillima (p. 23) 



5. Like C. subfalcata but smaller and the spores about 4-6/* long on an 



average-.. C filipes (p. 20) 



5. Resembling C. filipes, but 3-7 cm. tall, pure white, and spores 6-9 x 7-10/* 



C. acuta (p. 25) 

 5. Dull white to cream color, thickened and rugose to lobed above ; spores 



subspherical, smooth, large C. rugosa (p. 68) 



5. Deep orange-red, cespitose or single ; spores subspherical, about 5x6/* 



C. aurantio-cinnabarina (p. 60) 

 5. Rosy or pink, cespitose or single; simple or flattened or toothed above; 



spores rod-elliptic, 3.5x6.6-7.5/* C. rosea (p. 40) 



5. Blackish brown (amber to dusky sepia), single or cespitose; spores 



ovate-elliptic, 2.7-3.2x5.5-6.3/* C. nigrita (p. 43) 



* Such plants have been considered as species of Clavaria until recently when Atkin- 

 son has shown them to belong to the Auriculariaccae (Journ. Mycol. 8: 106. 1902). For 

 a full study of this species {Eocronartium muscicola) see Fitzpatrick. Phytopathology 

 8: 197. 1918, and Amer. Journ. of Bot. 5: 397. 1918. According to Fitzpatrick there 

 is only one species, which has appeared under a good many names. 



