IIYSTERANGIACEAIC 17 



greenish, subcylindrical, 4-5.5 x 1.5— 2a/, 6-8 on each basidium." The spores are 

 smooth; basidia elongated, club-shaped. 



r/iallogiister Whitci, described by Peck (Bull. N. Y. St. Mus. 116: 31. 1907) 

 from Connecticut, was based on small plants which in the opinion of Lloyd are a de- 

 pauperate form of this species. 



Illustrations: FiUpatrick. Ann. Myc. 11: pi. 4, figs. 8 and 9; and text figs. 1, 3, and 7. 1913. 

 Lloyd. Syn. Known Phalloids, figs. 93 and 94. 



Mattirolo. RealcAccad. d. Sci. di Torino, 2nd scr., 63: figs. 9-12. 1912. 

 Morgan. Journ. Cin. Soc. Nat. Hist. 15: pi. 2, 1892. 

 Thaxter. As cited above. 



Pennsylvania. Ohiopyle. Murrill, coll. (N. Y. B. G. Herb.). 



Buck Hill Falls. Mrs. Delafield, coll. (N. Y. B. G. Herb.). 

 New York. West Park. Earle, coll. (N. Y. B. G. Herb.). 



Onondago Co. Underwood, coll. (N. Y. B. G. Herb.). 

 Connecticut. West Goshen. Underwood, coll. (N. Y. B. G. Herb.). 

 Wisconsin. Blue Mounds. (Univ. Wis. Herb, and U. N. C. Herb.) 



Reported also from Massachusetts, Ohio, Kentucky, West Va., Iowa. See Lloyd, Myc. Notes, p. 1327, 

 and Martin, Iowa Acad. Sci. 32: 222. 1925. 



HYSTERANGIUM Vitt. 



Fruit body subterranean or partly exposed, subglobose, not stalked; peridium thin 

 and easily removable at maturity; gleba tough and elastic, finally deliquescing into a 

 slime; cavities irregular, elongated radially, extending to and abutting on the peridium, 

 with which the tramal plates are not continuous. Spores elongated, slightly or dis- 

 tinctly rough, and in all of our species furnished with a basal cup. 



Literature 

 Setchell and Watson. Some Ecological Relations of the Hypogaeous Fungi. Science 63: 313. 1926. 



Key to the Species 



Plants 3-15 mm. thick, surface fibrous and sandy or trashy; rooting by a bunch of fine fibers; basidia 

 mostly 2-spored 



Gleba distinctly olive; spores pointed at the distal end 77. dathroides (p. 17) 



Gleba not greenish; spores rounded at the distal end H. pompholyx (p. 19) 



Plants 1-2.5 cm. thick, surface smooth and even; rooting by a single basal cord; spores pointed at the 

 distal end; basidia mostly 3-spored B. sloloniferum var. americanum (p. 20) 



Hysterangium clathroides Vitt. 



Plates 16 and 105 



Fruiting bodies spherical to subspherical, 3-14 mm. wide by 4-11 mm. high, sessile 

 or partly buried, rooted by a more or less branched bunch of fibrils, some of which may 

 pass up on the side of the plant as in Rhizopogon; mycelium fibrous and obvious in the 

 soil. Peridium surface myceloid with numerous minute particles of earth and trash 

 adherent, rarely nearly smooth above, at times slightly areolate, whitish when young 

 with tints of flesh color, becoming buff to clay colored when maturing, consisting of a 

 single layer 145-190/i thick, composed of much entangled, closely packed threads which 

 in section appear like closely packed parenchvma cells; easily separable from the gleba. 

 Gleba tough-cartilaginous when young, becoming somewhat mucilaginous upon del- 

 iquescing, usually with a more or less central, branched columella which arises from the 



UJ LIBRARY 5 



