MICHIGAN ACADEMY OF SCIENCE. 77 
7. Lycoperdon. ' 
Key to species.* 
(a) Mature spores purplish-brown, large, rough, 5-7 mic. diam (b) 
(a) Mature spores yellowish, brown, or olive, smooth or only minutely 
rough. 3.5-5 mic. diameter (f) 
(b) Cortex spinulose or shaggy (c) 
(b) Cortex not at all shaggy (e) 
(c) Gleba turning purple quickly when full-grown; cortex of long, cdfiver- 
gent spines .' (d) 
(c) Gleba olive or umber, slowly turning purple. Spines slender, cruciate, 
soon disappearing 1. Lycoperdon atropurpureum. 
(d) Spines block; the denuded peridium reticulate with circles of minute 
spinules 2. Lycoperdon echinatum. 
(d) Spines white, (brownish when old); denuded peridium smooth 
3. Lycoperdon pulcherrimum. 
(e) Cortex a soft floccose covering, cream-color or yellow when fresh. 
Threads as thick as the spores 4. Lycoperdon glabellum. 
(e) Cortex smooth and continuous, gray or bluish-gray. Threads always 
thinner than spores 5. Lycoperdon rimulatum. 
(f) Fruit-body decidedly yellowish, small. Sterile base of compact, 
minute cells 6. Lycoperdon eoloratum. 
(f) Fruit-body not yellowish, or only slightly tinged (g) 
(g) Growing on mosses, especially Polytrichum. Cortex of spinules and 
granules 7. Lycoperdon muscorum. 
(g) Growing in clusters on stumps, logs or very rotten wood, with long 
white, mycelial strands 8. Lycoperdon pvriforme and varieties. 
(g) Growing on the ground in woods (rarely on very rotten wood.) 
9. Lycoperdon gemmatum and varieties. 
(g) Growing in pastures, fields, roadsides or other grassy places (h) 
(h) Cortex of small spines, flaking off, but not in large pieces as in the 
next. Capillitium of thick, hyaline threads, 2-3 times thicker than 
spores 10. Lycoperdon Wrightii. 
(h) Cortex of strong, cruciate spines, peeling off in patches. Capillitium 
brownish, some hyaline, not much thicker than the spores 
11. Lycoperdon cruciatum Rost. 
1. Lycoperdon atropurpureum Vitt. (In sense of Lloyd.) 
(For varieties, see below.) 
Other names: 
Lycoperdon atropurpureum var. hirtellum. (In Peck.) 
Lycoperdon echinatum Pers. (Young stage, in Peck.) 
Lycoperdon Peckii Morg. (per Lloyd.) 
Lycoperdon perlatum Pers. (In Morgan.) 
Lycoperdon hirtum Pers. (per Lloyd.) 
Lycoperdon hirtum Mart, (per Morgan.) 
Very variable mostly as to the nature of the cortex. Hence described as 
a number of varieties. The spines are slender, 2 mm. long. Spores rough, 
mixed with fallen pedicels, 5-7 mic. Fruit-bodv medium size, obovate, etc. 
la. Var. Lycoperdon floccosum. (In sense of Lloyd.) 
Other name: 
Lycoperdon elongatum Berk. (In Morgan and Lloyd.) 
* Adapted from Trelease and Lloyd. 
