BOLETI OF THE UNITED STATES 123 
there is some reason for supposing that all are forms of a 
single polymorphous species. The peculiar character and 
the great similarity in the stem of all of them are at least 
suggestive of a common origin if not of a unity of species. 
A better knowledge of these forms may perhaps lead to 
their union, but for the present it seems best to keep them 
distinct. 
CALOPODES 
Stem stout, at first bulbous, typically venose-reticulated. 
‘Tubes adnate, their mouths not reddish. 
The reticulate stem and adnate tubes of one color dis- 
tinguish the species of this tribe. Inthe Luridi the mouths 
of the tubes are differently colored and in the closely re- 
lated Edules the tubes are more or less depressed around 
the stem or subfree, and their pores are commonly stuffed 
when young. Fries did not admit species with whitish tubes 
into this tribe, but we have done so in those cases in which 
this was the only character to exclude them. 
MubesmclowsOlevellowishvensmas: se) aaa eel a se I 
Tubes white or whitish, at least when young ....... ai 
I. Tubes or flesh changing to blue where wounded. 2 
1. Tubes or flesh not changing to blue where wounded. . 5 
ZENS Ged .at least when young.) 9) os4.-/46: 3 
2. Pileus some other color.. OSE ee Neen eta 4 
Sh SUSI ASL Se peat Oo sn Ao ee ena ee ti a B. Peckii. 
3. Stem yellow or reddish only at the DASE OARS AAReree ts B. speciosus. 
Ahubes anomlara piles, OlivaCeCOUS\aa-)- acc. -)-i1- a) B. calopus. 
4. Tubes rotund, pileus not alice. Bibeaiis (ete vr atorse B. pachypus. 
Bo PAUKSTIS AWMGVENC IS Satie be neat Iker 0 Ate At eb ae oh eae B. Curtisii. 
SlcucHpmiverulenty stems CeespllOSG.- sei... ee. 2-5 B. retipes. 
PlcCuS Mel Nem viscid nOmpulventlent ce. -t.eneas. . 6 
GRESLE mmc lOwis te sia oer ace Molen ale kek ok B. ornatipes. 
OMSL CINGOT OMIM sae ye sie ao /cvcn stele leisegecs sce uy. Sais so ties B. modestus. 
Gr Stemmyellawish=wihites ws) ci eaden.e = ots ses sccne B. rimosellus. 
Fo IEMs Sonne “Slancl Oli wel 425 d5cdqq aacousoo ues lode 8 
7 rileusisome shade on brOwIMOnetay..1.. 22. 2.2 es: 
SwIStemuypallidion- yellowish eer ss o-12 fat. eo sie B. rubiginosus. 
Sp SUS CETAK IOMONIT Is Ses cc dBOe te UO OOD Ee tee ae B. ferrugineus. 
g. Pileus pale-brown, stem flexuous . .. 1 ee Da he xUOsIpess 
g. Pileus gray or grayish-black, stem semen. a Nsrwar AR tevedtere B. griseus. 
