IO 



BOTANICAL GAZETTE 



[JULY 



the base, as can be observed in sections, and new growth takes 

 place in an apical peripheral zone. This is also clearly shown 

 in text fig. 3^4-Z), where two basidiocarps were marked with 

 India ink, and the position of the lines observed on the older 

 fruit bodies. The outer zone of the peridium comes from the 



loosely interwoven tissue on 

 the outside of the youn«* 



A 



B 



£> 



undergone 



F 



G 



H 



Fig. 3. — A, basidiocarp marked with 

 India ink when 3 mm. high to determine 

 region of growth; B, same 10 mm. high; 



C, basidiocarp marked when 5 mm. high; 



D, position of marks at time of expansion; 



E, F, side and end views of basidiocarp 



knots, which has 

 little differentiation from the 

 condition in the mycelial strand 

 (figs. 11, 12, 17), the zone of 

 pseudoparenchyma, from the 

 closely interwoven filaments 

 within this; while the inner 

 layer is made up of more or less 

 gelatinized filaments which ap- 

 pear very differently at differ- 

 ent stages in the development of 

 the basidiocarp. The first dif- 

 ferentiation seen in the fruit 



marked just before expansion; G, H, same body is the beginning of gelati- 



basidiocarp with peridium breaking away nization of the filaments of this 

 and epiphragm showing in center. . 1 • ,1 



6 inner zone, and in the younger 



basidiocarps it constitutes the great bulk of the tissue (figs. 13, 15,17)- 

 As the fruit body matures, the continued enlargement of the glebal 

 region causes this inner zone to become more and more compressed, 

 until in a mature specimen it is seen as a zone no wider than the 

 middle zone (fig. 23). At all times the inner zone shows three 

 definite regions so distinctly that they might almost be considered 

 as separate zones. Next to the middle pseudoparenchymatic zone 

 the filaments are loosely interwoven, little if at all gelatinized, and 

 lie longitudinally, following the outline of the middle zone. To 

 the inside these give rise to the wide band of much gelatinized 

 filaments which extend centripe tally upward, and merge into the 

 interwoven filaments which border the gleba. 



The peridium covers all of the basidiocarp except the top. 

 To the inside of the abrupt angle shown at the top of the fruit 



