(Vol. 13 



176 annals of the missouri botanical garden 



Key to the Species 



I. Substance not appreciably colored, no gloeocystidia. 



1. Hymenium white or whitish when growing 1-23 



*With antler-shaped paraphyses or color change from yellow to 



white in fruiting 1,2 



**Spore8 globose or subglobose. 



a. Imbedded spores (chlamydospores) usually present 3,4 



h. Imbedded spores not yet observed 5-0 



•**Spore8 more elongated. 



a. Spores large, more than 6 /x long 10, 11,33 



h. Spores small, hyphae incrusted or among obscuring mineral 



matter 12-16 



c. Spores small, hyphae not incrusted 15-23 



2. Hymenium colored when dry and not known to be white at first — 



usually some shade of buff, yellow, red, brown or blue 2^-56 



*Spores globose or subglobose, less than 5 m in diameter 24-26 



**Spores globose or subglobose, more than 5 m in diameter 27-29 



***Spore8 more elongated. 



a. Spores very large, 10-18 m long SO, 31 



b. Spores large, 6-12 m long 52-44, 90 



c. Spores small, hyphae somewhat incrusted 12, 45-48 



d. Spores small, hyphae not incrusted, fructifications separable. 49 



e. Spores small, hyphae not incrusted, fructifications closely 



adnate or only small pieces separable 50-56 



II. Gloeocystidia present or structure vesicular, or some tissue note- 



worthy, substance colored or not colored. 

 *GIoeocystidia present or shown by vesicular structure or by colored, 



resinous-appearing masses 57-86, 107 



a. Gloeocystidia not colored, elongated, imbedded spores nu- 



merous 57-58 



b. Gloeocystidia not colored, elongated, lacking chlamydospores. 



fSpores globose, subglobose or broadly ovoid 59-66 



ttSpores more elongated 66-71, 79 



c. Gloeocystidia not colored, pyriform to globose 72-79 



d. Gloeocystidia colored, elongated 80-83 



e. Gloeocystidia colored, subangular or globose, resinous-ap- 



pearing 66, 84-86 



**Di8tingui8hed by antler-shaped branching of some hyphae or para- 

 physes, or other branching of paraphyses, or unusual form of other 



tissues 1, 17, 23, 29, 36, 38-40, 60, 72, 76, 80, 87, 88, 92-94, 107 



***Numerous imbedded spores or other than basidiospores. . . .3, 4, il, 37, 57, 58 



****Spore8 green, even 106 



*****Spores usually white but finally becoming ochraceous 34 



III. Substance colored, no gloeocystidia 87-106 



•Fructifications ranging from gray to drab. 



a. With paraphyses having slender branches, spores small 87, 88 



b. Paraphyses not noteworthy, spores larger, 7-10 n long 89-91 



**Fructification8 ochraceous to wax-yellow and red. 



