REPORT OF the; STATE BOTAISTIST I9I7 79 



of Specimens, soon become much torn and lacerated so that the 

 hymenium at times comes to have somewhat the appearance of 

 specimens of H y d n u m o c h r a c e u m (plate 4, figure 3) , 

 although the color is not quite so deep. In some specimens there is 

 a very slight sheen or silkiness to the surface of the hymenium. 



The spores are the exact counterparts of those of P o r i a 

 m y c e 1 i o s a , except that they are slightly smaller. When seen 

 on basidia before maturity they appear more or less globose. When 

 mature they are ellipsoidal, hyaline, and measure 2 to 3 /a in length 

 and about 1.5 ^i in breadth (plate 5, figure 7). The basidia are rather 

 small, never exceeding 3 /a in diameter. There are abundant 

 cystidia in the hymenium. These project prominently into the 

 lumen of the tube (plate 5, figures i and 2). At times they appear 

 to be associated in small groups on certain walls of the tubes, but 

 at other times they are evenly distributed. They are hyaline and 

 rather heavily encrusted with small crystals. Their shape can best 

 be made out by reference to the illustration on plate 5 (figures 2, 

 5 and 6). Sometimes they are shap pointed and at other times 

 more blunt on the apex. They are 10 to 15 /a in diameter at the 

 thickest points and project 10 to 30 fx. beyond the basidia. A much 

 greater length is embedded in the tramal tissue, however, so that 

 the total length may reach 50 fx or more. The embedded portion 

 is usually free from crystals and appears as a large, thick-walled, 

 hyphalike structure. These cystidia are very much alike in both 

 sets of specimens on the herbarium sheet, though in KOH solution 

 those found in the one set are brownish in color. 



The hyphae of the subiculum are colorless and practically simple, 

 and no cross walls or clamp connections are apparent (plate 5, 

 figure 4). Their diameter is 2 to 4 ju,. Those of the trama are 

 somewhat smaller, somewhat more branched and more flexuous, 

 with a diameter of 1.5 to 3 /x (plate 5, figure 3). They are practi- 

 cally the same in both sets of specimens on the herbarium sheet. 



The relationships of this species are clearly those of P o r i a 

 m y c e 1 i o s a . The chief point of difference having diagnostic 

 value is the presence of cystidia in the former species and the 

 absence of cross walls and clamp connections. Another fact that 

 may be of some significance is that Poria myceliosa has 

 been collected only on the wood of coniferous trees while Poria 

 f i m b r i a t e 1 1 a is known only from the wood of deciduous trees. 

 The length of the tubes in Poria fimbriatella is some- 

 what greater and their diameter somewhat less than in the other 



