48 BULLETIN 175, U. S. DEPARTMENT OF AGRICULTURE. 



Dictyophora duplicata. 



Dictyophora duplicata is from 6^- to 9 inches high, with cap about 2 \ inches in 

 diameter and the stem one-half to three-fourths inch in thickness. The cap is cam- 

 panulate, and after the deliquescence of the gelatinous gleba appears recticulate 

 pitted. The long white veil, which is sometimes entire but often torn and shreddy, 

 is pendulent and consists of coarse, thick threads. Dictyophora duplicata is considered 

 edible if used before the volva has ruptured, and when cut in slices and fried or 

 stewed it is said to be fairly good. (PI. XXXV, fig. 1; from J. B. Rorer.) 



Dictyophora ravenelii. 



This species is readily distinguished from the preceding by the more slender stem 

 and the conico-b ell-shaped cap, which is wrinkled after the disappearance of the gleba 

 and does not present prominent reticulations. The veil is membranaceous and 

 not conspicuously netlike, as in Dictyophora duplicata. (PI. XXXVI, figs. 2 and 3; 

 from G. F. Atkinson.) 



ITHYPHALLUS. 



The genus Ithyphallus is similar to Dictyophora, but differs in not 

 having a netlike veil. 



Ithyphallus impudicus. 



The volva is globose or ovoid, white or pinkish, 2 to 3 divided. The cap is conic 

 to campanulate, the surface reticulate pitted, apex smooth, and the stalk cylindric- 

 fusiform, hollow, and widely perforate at the apex. This is a very common species, 

 and is found in considerable numbers about dead stumps, fence corners, yards, etc. 

 Its presence is readily detected by the strong, disagreeable odor which it emits when 

 mature. Mr. C. G. Lloyd, from his study and observations of types, considers our 

 American form a variety of Ithyphallus impudicus on account of the pink volva, and 

 he states that we do not seem to have the type form with the white volva. (PI. 

 XXXVII, fig. 2.) 



MUTINUS. 



In the genus Mutinus the receptacle or stalk is cellular or spongy, 

 simple, elongated, cylindric tapering, with the gleba-bearing portion 

 definite. The species of Mutinus are very similar in general form and 

 color, but are mainly separated by the character of the cellular 

 structure of the receptacle and the separation between gleba and stem. 

 The two species most commonly found are here described. 



Mutinus caninus. 



Stipe hollow, perforate or imperforate, fusiform, white or reddish; spore-bearing 

 portion flesh colored, sharply defined, cellular structure not uniform; e. g., the cells 

 or minute chambers composing the stem are larger than those of the gleba-bearing 

 portion. 



Mutinus elegans. 



Stipe hollow, perforate, tapering from base, white or pinkish; spore-bearing part red 

 not sharply defined, cellular structure uniform. 



L YCOPERDA CEM. 



Key to Lycoperdacese. 



Peridium with or without a sterile base, outer layer spiny, warty, or 

 papery: 



Dehiscence regular by apical mouth Lycoperdon. 



Dehiscence irregular. T . . , . r r . . , , Calvatia. 



