Clavarias of the United States and Canada 47 



Peck has a collection from Sand Lake, N. Y., labelled C. fragilis 

 var. solida, but he does not seem to have published this name. No 

 difference appears in the dried plants. A collection in the Curtis 

 Herbarium from E. P. Fries, Upsala, (as C. fragilis), is like ours 

 and has similar spores. Quelet distinguishes between C. vermicu- 

 lata and C. fragilis, the former being entirely white, the latter a 

 little yellowish at the apex and smaller. He does not refer to the 

 solitary habit at times. There seems to be nothing to distinguish 

 Ouelet's C. nivea from the yellowish tipped form of this except 

 the slightly longer spores. Rosenvinge finds that in C. vermicu- 

 laris the cells of the flesh may contain one to four nuclei, and that 

 the mature spores have regularly two nuclei (Ann. Sci. Nat. Bot. 

 Series 7, 3: 75, pi. 1, figs. 1-3. 1886). He finds that the spore 

 of C. fragilis has but one nucleus (no figures) and thinks that in 

 these cases as in others the number of nuclei in the spore is of 

 systematic importance. One cannot be sure what plants he de- 

 termines as C. vermicularis and C. fragilis. Juel (cited under C. 

 cristata), on the contrary, finds the spore of what he calls C. 

 fragilis to have two nuclei (pi. 3, figs. 87-90), resulting from a 

 division in the maturing spore. He further finds the basidia 4- 

 spored, the basidia and hymenium much as in C. muscoidcs and C. 

 subtilis. The latter author has sent us (as C. fragilis) a collection 

 from Upsala which is like ours; spores smooth, oval, 3-3.7 x 3.8- 

 5.4(1.. 



Illustrations: Barla. Champ. Nice, pi. 41, figs. 14-16. 1859. 



Bolton. Hist. Fung. Halifax, pi. Ill, fig. 1 (as C. gracilis). 1789. 

 Britzelmayr. Hymen. Stidb., Clavariei, figs. 58 (as C. fragilis) and 56 



(as C. vermicularis) . 

 Buller. Researches on Fungi 2 : fig. 62. 1922. Photograph by Miss E. M. 



Wakefield. 

 Bulliard. Herb. France, pi. 463, fig. 1 (as C. cylindrica). 1789. 

 Clements. Minnesota Mushrooms, fig. 76 (as C. juncea). 

 Flora Danica, pi. 1783, fig. 2; pi. 1966, fig. 2 (as C. vermiculata) ; and 



pi. 775, fig. 2. 

 Hard. Mushrooms, fig. 395 (as C. vermicularis). 1908. 

 Holmskjold. Beata Ruris 1: pis. 2 and (yellow form) 3 (both as C. 



fragilis). 1790. Photographed in part by Burt in Ann. Mo. Bot. Gard. 



9 : pi. 9, fig. 74. 1922. ' 

 Gillet. Champ. France 5: pi. 103 (109) (as C. fragilis, both white and 



yellow forms). 1874-78. 



