This is based on a collection by Spruce, Brazil, and is at Kew. The 

 collector states "Hymenium vinosum," hence Berkeley named it erubescens. 

 The pores have lost all vinous color now. The strong character of the species 

 for me is its rigidity, both of pileus and pores. The species is found in Sac- 

 cardo in section "Hirtae." The type has not a sign of a hair of any kind. There 

 is a collection at Kew, however, that was referred to erubescens, and which 

 has appressed fibrils, but I think it quite another (and a "new") species. I 

 should prefer that some one else name it. 



Fig 301. 

 Hexagona erubescens. Type at Kew. 



Fig. 302. 

 Hexagona amplexens. 



HEXAGONA AM- 

 PLEXENS (Fig. 302). 

 Pileus small, ungulaform, 

 gibbose, smooth, with sul- 

 cate zones. Context brown, 

 suberose. Pores 5-6 to cm., 

 5-8 mm. deep, concolorous, 

 with thin walls, no setae. 



This little species is unique in size and shape. It is known from one col- 

 lection in the herbarium of Patouillard, and came from New Caledonia. It 

 evidently grew on small branches which it partially encircled. 



SECTION 5, TENUIS. 



This group is the most important of all for it embraces the only common 

 species that grows in many warm countries, viz. : Hexagona tenuis. They are 

 thin plants, rarely over two or three mm. thick, with smooth, concentric-zoned 

 pilei. The pores are small and shallow. Sometimes the plants are called 

 membranaceous, but I think are not thin enough to be called membranes. 



