488 HOWARD A. BURT ON A 



gleba (Fig. 2) until the plant reaches its maturity. Then deliquescence of the gleba 

 occurs — accompanied by a fetid odor which is, however, perceptible for a distance of 

 only a few feet — and the arms, upon becoming bared from their covering of spores, 

 disclose a surface marked by irregularly branching transverse wrinkles, which do not 

 cross the backs of the arms (Fig. 1). 



Upon splitting the mature fungus longitudinally, the stipe is found to be thick-walled 

 and with a large central cavity. The surface of this cavity is cross wrinkled 

 (Fig. 4). A longitudinal radial section of the wall (Fig. 4) shows a cavernous structure 

 of about three series of cavities running longitudinally and almost separated from each 

 other, and cut up by plates and folds of the pseudoparenchymatous tissue of the wall. 



Near the' plane of union of the stipe with the arms a thin diaphragm, having an 

 aperture of variable size and position, but often central, separates the main central 

 cavity of the stipe from a dome-shaped cavity above (Fig. 4). The dome-shaped 

 cavity is closed above, and differs from the central cavity of the stipe in having a wall 

 with an even inner surface. Thin sheets of white tissue pass out laterally from the 

 wall of the dome into the spaces between neighboring arms and extend vertically 

 upward through the gleba. The plane of section for Fig. 4 is a nearly median one 

 between neighboring arms, and cuts these sheets longitudinally in areas marked T, Fig. 4. 

 The gleba is here marked g. The hymenial surface is borne upon a very complicated 

 system of folds and pockets, or closed chambers, of this tissue (h, Fig. 20), as will be 

 described further on. 



The spores (Fig. 12) are apparently olive-green, simple, ellipsoidal, 3-4 fx X 1 1-2 /a. 

 They are borne in clusters of from 5 to 8 at the ends of slender basidia which are 

 divided into 4 or 5 short cells and are constricted at the septa (Fig. 11). But this is 

 also considered again further on. 



A median longitudinal section through the arm and the dome (Fig. 5) shows that 

 the inner face of the arm is adnate to the dome for about one sixth of the length of the 

 arm. This results in confining the gleba in this lower portion of the arm to the spaces 

 between the lateral faces of the arms (Fig. 8). There exists here in the lower portion 

 of each arm the condition which Patouillard 1 has shown to exist in Lysurtis mokusin 

 (Cibot) Fr. throughout the entire length of the arm. 



Each arm is hollow (Fig. 5). Its outer and inner surfaces are approximately parallel, 

 the wall being really thrown into transverse folds rather than merely wrinkled in its 

 (inter surface as seems to be the case when viewed externally after the deliquescence of 

 the gleba. 



"^itouillard : Fragments mycologiques ; X. Organisation clu Lysurus mokusin Fr., p. C3-70. Ami also Journal do 

 1(3 Juillct, lS'JO, p- 252. 



