Color of pores. Pure cinnamon or ferruginous to dark (fuscus), sometimes 

 bright silvery, glaucous. 



At Kew there are ninety-two collections in these two covers and scarcely 

 any two of them exactly the same. Under these conditions it is only practical 

 to do as has been done and refer all to one or two species. 



The following we should consider as forms of Hexagona tennis, and we 

 could manufacture as many more if we were so disposed. 



Fig. 309. 

 Hexagona umbriiiella. Small oc 



is the type at Upsala 



HEXAGONA UMBRINELLA (Fig. 309). This has a dark reddish 

 brown, rugulose surface. 27 The same thing is also called Hexagona Dregreana. 

 Hexagona Boneana is also too close. 



HEXAGONA CONCINNA is a very thin plant with small, dark pores 

 and dark reddish pileus. 



HEXAGONA DISCOPODA is a plant with the reddish stain only par- 

 tially developed over the base of the pileus so that the plant is decidedly tivo- 

 colored. It seems to be a frequent form in Africa and abundant specimens 

 reached Hennings and were referred by him to Hexagona polygramma. It is 

 probably the same as tricolor named by Fries from Africa many years ago 

 (because of its color contrasts), but no specimen is known now. 



HEXAGONA SUBTENUIS was named by Berkeley from India, but I 

 think not published. It has ferruginous colored pores that to me under a lens 

 appear slightly pubescent. 



HEXAGONA PHAEOPHORA is a form with pale pileus and dark pores. 



All the preceding are thin plants, very similar to Hexagona tenuis, and 

 differing principally in color, pore color, and pore size. The four following, 

 rigida, similis, Muelleri, and nigrocincta, are thicker plants (relatively), but 

 with the same general characters and small regular pores. They differ among 

 themselves as do the forms of tenuis. All come from the same geographical 

 region, Australia, New Caledonia, and the Pacific Islands, and all, I think, are 

 better considered as forms of one species. 



HEXAGONA RIGIDA (Fig. 310). Pileus about 3 mm. thick, 

 with smooth or slightly rugulose zoned surface and small regular pores. 



27 The "co-type" that Fries sent Berkeley of Hexagona umbrinella is a much thicker 

 specimen than is to be found in his own herbarium. I think it is not the same species. 



