SECTION PETALOIDES. 



seen no authentic specimens of obovatus, but teste Bresadola, dilatus 

 (bis) of Berkeley is a synonym and there is an abundance of that 

 at Kew. 



PET ALIFORMIS. Usually cuneate, tapering to the base. I 

 judge from specimens I saw at Berlin that it has a rooting stem. Usu- 

 ally faintly zonate and marked with striations. Close to mutabilis and 

 of the same distribution, but is quite different I think. 



STEREINUS. Pileus thin, attenuate behind and sometimes with 

 a short stem, evidently soft and watery when fresh but drying thin, 

 rigid, incurved, and turning black. It seems very common in tropical 

 America, also from the East. 



HOLOTEPHRUS. Spathulate, attenuate at the base but hardly 

 stipitate. Pores minute. Color almost black with metallic zones, and 

 I think has not changed in drying. Known from the type at Kew 

 from Cuba. 



ARMENICOLOR. Pileus thin, minutely pubescent, brown- 

 zoned, tapering to a short but distinct stipe. Pores small, white. Ex- 

 cept as to its distinct stem this plant is more closely allied to the versi- 

 color group. It is known from one collection at Kew from Cuba. 



ANTILOPUS. This is quite a frequent plant in the museums, 

 and I found it also in Samoa, that had been misdetermined either as 

 russogramme or rasipes or palensis. It is referred by Bresadola to 

 "vibecinus var. antilopus, Kalch." and it agrees with the cotype at 

 Kew. No specimens of vibecinus are preserved and I think no one 

 knows what it was. 



23. POLYSTICTUS-MICROPORUS. LATERAL STEM. 



(Cfr. also pleuropodal species page 173.; 



The section Microporus, which has been held to be a genus, is characterized 

 by its thin, rigid context, reddish brown color and minute pores in a very thin 

 layer. We have published a "Synopsis of the section Microporus" with illus- 

 trations of the species. 



AFFINIS (Fig. 447). Stipe lateral, smooth, dark bay or black. 

 Pileus smooth. Frequent throughout the East. 



LUTEUS. Same as affinis but more obese and thicker. Fre- 

 quent and runs into affinis. 



MAKUENSIS. Same as luteus but with distinctly larger pores. Referred 

 in my Synopsis as a synonym for luteus, which I think on re-examining the type 

 is an error. Known from one collection at Kew from Africa. 



PORPHYRITIS. Probably the same as luteus, but from America, where 

 all of this section are rare. 



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