120 Wisconsin Academy of Sciences, Arts and Letters. 



— PI. 3, f . 6. — Grass land or in mossy dry woods. Also sent me from Sparta 

 {Miss Schuster) and River Falls {King), and reported by Bimdy. 



Our "Western form, as I have seen it at Madison and about St. Louis, is of- 

 ten smooth except for the simulate areolation referred to, in this respect 

 differing from a common Eastern and European form, which is also de- 

 cidedly yellow, but it is undoubtedly a form of the same polymorphic 

 species. The S. verrucosum of Bundy's list is presumably the rougher 

 plant, which is shaggy with coarse scales, often free and recurved above. 



Scleroderma Bovista Fr., named in Bundy's list, differs from vulgare in its thinner perid- 

 ium, and from both of the preceding species in the more olive spore-mass with inter- 

 mingled yellow flocci; otherwise it closely resembles 8. vulgare, from which, like Caspary 

 (I. c. 204), I often find it hard to separate it. 



Elaphomyces, one of the Tuberaceae, developing underground, when mature resembles a 

 Scleroderma: but its spores are borne in asci that are evident in j-oung plants. We 

 have as yet found no representative of this genus, which should be looked for in pine woods,, 

 etc. 



EXPLANATION OF PLATES. 



The plants are represented of the natural size, and their spores uniformly- 

 enlarged 2000 diameters. 



PLATE VII. 



1, Geaster hygrometricus and spore; 2, G. saccatus and spore; 3, G. Ra- 

 benhorstii and spore; 4, G. hmbatus and spore; 5, Bovista plumbea and 

 spore; 6, B. pila and spore; 7, Lycoperdon pedicellatum (small specimen)' 

 and spore; 8, L. Wrightii, two plants and spore; 9, spore of L. caelatum: 



PLATE VIII. 



1, Lycoperdon gemmatum and sj)ores; 2, L. coloratum and spore; 3, L* 

 oblongisporum and spore; 4, L. ericetorum and spore; 5, L. pyriforme and. 

 spoi'e; 6, L. molleand spore; 7, Secotium acuminatum, in section, and spore. 



PLATE IX. 



1, Lycoj)erdon pulcherrimum and spore; 2, L. atropurpureum, three- 

 plants and spore; 3, L. rimulatum and spore; 4, L. constellatum (?) and spore;. 

 5, L. glabellum and spore; 6, Scleroderma vulgare and spore; 7, S. verruco- 

 sum, — subsessile and stipitate forms. 



