LEUCOSPORI. 



IX. Agaricus (Omphatid) urn- 

 belliferus. Natural size. 



its gills. Stature and history the same. Species of the same Omphalia. 

 stature also occur among the Cantharelli and Marasmii. The 

 pileus is most frequently indeed um- 

 hilicato-infundibuliform, but this fea- 

 ture is in no wise constant or essential, 

 nor is it a mark of more importance 

 that the gills are often branched. Fr. 

 Hym. Eur. p. 154. 



The species are generally well 

 marked. They prefer a moist situation, 

 and stand changes of temperature well. 

 The larger ones are peculiar to moun- 

 tainous regions. They are inodorous, 

 and none are known to be edible. 



I. Collyhiarii. Pileus at the first dilated, 

 with the margin inflexed. These are divided 

 by their gills into three very distinct groups. 



* Hydrogrammi (A. hydrogrammus). 

 Commonly comparatively large, gills nar- 

 row, very crowded. Besides the essential mark afforded by the stem, they 

 differ from the cyathiform Clitocybas by their gills, which are truly decurrent 

 at the first, very crowded and arcuate. 



** Pyxidati (A. pyxidatus]. Intermediate, gills slightly distant, narrow, 

 attenuated at both ends. 



*** Umbelliferi (A. umbelliferus). Gills very distant, broad, commonly 

 thick. (Xerotus turfosus is likely to be looked for here.) 



II. Mycenarii. Pileus at the first campanulate, margin straight, pressed to 

 the stem. 



* Campanellae (A. campanella). Gills broad, perfect, unequal. 

 ** Integrelli (A. integrellus). Gills fold-like, narrow. 



I. COLLYBIARII. 



* Hydrogrammi. Gills narrow, 'very crowded. 



322. A. hydrogramnms Fr. Of one colour, livid or whitish- 

 livid when moist, whitish when dry. Pileus 5 cent. (2 in.) and 

 more broad, somewhat membranaceous, flaccid, deeply umbilicate, 

 remarkably hygrophanous, border spreading, somewhat undulated, 

 striate. Stem 7.5 cent. (3 in.) long, 6 mm. (3 lin.) thick, remark- 

 ably cartilaginous, hollow-fistulose, smooth, rooted and white- 

 bearded at the base, sometimes shorter, round, straight, sometimes 

 elongated, often decumbent and caespitose, commonly compressed 

 and undulated, livid, naked at the apex. Gills deeply decurrent, 

 very crowded, narrow, arcuate, quite entire, very unequal, livid- 

 whitish. 



Somewhat csespitose. When in the dry state it has been confounded by 

 most authors with A. phyllophilus. 



