ГУ ог. 5, 1918] 
32 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
EXPLANATION OF PLATE 
PLATE 1 
Fructifications of species of Rhizopogon (natural size). 
Fig. : R. Ае showing the prominent, free fibrils. 
Fig. R. graveolens showing the characteristic surface and 
usual PRÉ of the fructifieations. 
Fig. culatus showing fibrils. 
Fig. 4. R. сома showing the innate fibrils. 
Fig. 5. В. roseolus showing the dark peridium and scanty fibrils. 
ig. R. pannosus showing the “patches” or remains of the 
outer peridium, 
Fig. 7. R. occidentalis showing the prominent, innate-appressed 
fibrils. 
A fruetifieation of R. pachyphloeus showing both the 
black cut surface and the external surface with reticulated, innate 
fibrils. 
Fig. 9. R. rubescens var. Vittadinii showing the nature of the 
fibrils, 
