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Mycologia 



Hydnotryopsis Setchellii is one of the rarest forms found. It 

 was described from one of the Harkness collections and not re- 

 ported again until found with other rare forms at Guadaloupe. 

 The plants are small and of a clay color with a white gleba. 

 Found in wet clay soil at a depth of three inches. Material col- 

 lected here was sufficient to verify all details of the descriptions 

 which were made from long-preserved material. There have been 

 some additional collections and one that would indicate that the 

 species attains a size of over three centimeters, 



Delastria rosea has been collected twice, once in an earthy pocket 

 among rock ledges under laurel and once this last season under 

 pines. It is a small inconspicuous plant tinged with red and re- 

 sembles very much one of the small rosy-colored Hymenogasters. 

 It is, in spite of its color, a very rare and difficult plant to collect. 

 The last collection was made in a bed of purple mycelium which 

 was producing a large amount of a species of Elaphomyces. To 

 be expected under all kinds of trees. 



Hydnobolites calif omicus occurs in abundance apparently under 

 all kinds of trees and begins to develop very early in the winter 

 and remains up till the first of June. Very slow in maturing and 

 quickly riddled by the slugs. It appears in a vein of coarse white 

 mycelium, to which it is attached by a long, thick rhizomorph, 

 which breaks away very easily. The point of the attachment is 

 easily seen, however. It is a dirty white, compactly developed 

 globose or irregular ascocarp without a thick protecting peridium 

 as in the various species of Tuber. The venae externae open in 

 numerous places to the surface and are very conspicuous in the 

 young plants. It becomes dry and gristly in age, turning to a 

 light brown color. 



Several large plants collected late in the season possessed a very 

 strong musty odor without being in any way decayed. These were 

 found in a bed of mycelium about two inches below the surface 

 of the soil under oaks. As the plants matured they pushed farther 

 toward the surface and finally were severed from the mycelium 

 altogether as they reached the surface of the soil, where they were 

 covered very slightly with dry leaves. 



Pseudobalsamia magnata occurs early in the season in wet clay 



