12 BOTAMCAL GAZETTE [july 



Cultures of C. striatus were made at various times, from material 

 collected near Lincoln, Nebraska, by the same method as used for 

 C. fascicularis. An abundant development of mycelium resulted, 

 which was structurally much like that of C. fascicularis. The 

 mycelium was at first white, but soon became a dirty brownish color, 

 with many strong mycelial strands. In a few cases small knots 

 appeared upon the mycelium, but mature basidiocarps were never 

 developed. 



Young basidiocarps. — The youngest fruit bodies obtained 

 were 2 . 5-4 mm. high, and the differentiation had advanced to a 

 considerable degree, so that the peridial and glebal regions were 

 well defined. Figs. 34 and 35 show very low and figs. 37 and 

 38 higher magnifications of fruit bodies of this type. They show 

 about the same condition as is shown by Tulasne (9, pi. 3, fig. 5). 

 The peridium has the same structure as in the mature basidiocarp 

 (see fig. 48, the outside to the right), but it is not quite so much 

 hardened. It is made up of three definite zones. The outer of 

 these is made up of loosely interwoven, generally longitudinal 

 filaments, which give rise on the outside to the dense covering of 

 large, stiff, septate hairs about 6-10 ju in diameter; the middle is 

 a pseudoparenchymatic layer which is much wider than the 

 corresponding zone in C. fascicularis; while the broad inner layer 

 is composed of more or less gelatinized filaments extending to the 

 central top -shaped primordium of the gleba. This inner zone 

 shows the three definite regions as described for C. fascicularis. 



At the upper portion of the fruit body is an annular, deeper 

 staining region where the peridial and glebal portions meet (figs. 

 37-40). This is the region of greatest growth, where new elements 

 are added, both to peridium and gleba, during the elongation of 

 the basidiocarp, just as in C. fascicularis. The top of the basidio- 

 carp is covered densely with coarse hairs. The filaments from 

 which these arise are much smaller and lie almost parallel to each 

 other, thus forming a very definite zone over the upper portion 

 of the gleba. The glebal region consists of closely interwoven 

 filaments about 2 ju in diameter, resembling that of C. fascicularis. 



Origin and development of peridioles and funiculus. 



The section shown in figs. 36 and 39 are of a basidiocarp 5 mm. 



