294 OUTLINES Ob- BRITISH FUNGOLOGY. 



Under trees. Bristol, Dr. Stephens. Sometimes half ex- 

 posed, as pointed out to me at Bristol by Mr. Broome and 

 Mr. Tlnvaitcs. Colour exactly that of a carrot. Communi- 

 cating to paper a lemon-coloured stain. 



56. HYSTERANGIUM, Fitt. 



Peridium indchisccnt, distinct, separable. Cavities at first 

 empty. Substance cartilaginco-glutinous. Spores minute. 



1. H. nephriticum, /^. ; depressed, springing from a white, 

 flat, branched, membranous mycelium ; peridium firm, elastic, 

 distinct, tomentose ; substance pale blue or grey, here and 

 there greenish ; cavities radiating from the base ; spores mi- 

 nute, oblong, pale clay-colour. — Ann. Nat. Hist. xiii. p. 350. 



Under trees. Clifton, C. E. B, Smell at first like that of 

 some Hypericum, then exactly that of a decaying Puff-ball. 

 The spores in the closely allied H Pomjiholyx, Tul., are rose- 

 coloured. 



2. H. Thwaitesii, B. and Br. , subglobose, white, rufous 

 when bruised ; peridium membranaceous ; spores oblong api- 

 culate. — Ann. of Nat. Hist. ser. 2. ii. ^. 267. 



Under trees. Bristol, C. E. B. Alycelium white, fibril- 

 lose. Seldom flattened. Cavities brownish-olive. The hy- 

 menium of Hysterangium is very like that of a young Phallus. 



57. RHIZOPOGON, Tul. 



Peridium continuous or cracked, adhering to creeping 

 branched fibres, which traverse its surface. Cavities distinct, 

 at first empty. Spores smooth, oblong-elliptic. 



I. R. rubescens, Tid. ; white, then reddish, and at length 

 livid-olive, furnished with a few fibrillje ; substance very lacu- 

 nose, dirty-white, then olive ; cavities always empty. 



