200 AGARICACE^E Psathyrella 



912. P. arata Sacc. (from the furrowed pileus ; aro, to plough) a. 



P. attenuato-conical, deeply sulcate, sienna-brown. St. smooth, 

 whitish or faint sienna-white. G. ascending free, purplish- 

 black. 



Hedgerows. Autumn, ij x 5| X J in. 



913. P. trepida Gill, (from its trembling habit ; trepidus, trembling) 



a b c. 

 P. obtuse, smooth, fuliginous ; mid. date-brown. St. naked, 



tan-whitish. G. adnate, crowded, fuliginous-black. 

 Moist ground, bases of trunks, gardens. Oct. £ X 3J X -^ in. 



914. P. hydrophora Quel, (from its hygrophanous substance ; Gr. 



hudor, water, ft hero, to carry) a b c. 

 P. expanded, obtuse, then cracked-revolute ; mid. rufous; marg. 



paler. St. white, studded with drops of moisture. G. adnate, 



crowded, black. 

 Gardens. Autumn, if X 3J X \ in. 



915. P. eaudata Quel, (from the tail-like base of the stem ; cauda, a 



tail) a b c. 



P. gibbous then flat, smooth, sometimes areolato-cracked, 



atomate, date-brown or umber. St. with rooting base, 



undulate on surface, white. G. adnate, ventricose, ashy-black 



or dull purplish-brown. 



Wooden pavement, rotten wood, rich soil, gardens, amongst dead leaves. 

 Sept.-Dec. 2§ x 4f X £ in. 



916. P. prona Gill, (from its frequent prostrate state ; promts, 



prostrate) a b c. 



P. subexpanded, obtuse, subsilky, fuliginous, atomate and hoary 



when dry. St. smooth, whitish. G. adnate or adnexed, livid 



fuliginous, black-dotted. 



Grassy places ; rare. May-Oct. f X i|x ^ in. Var. Smithii Mass. P. 

 hemispherical J in. in diam. 



917. P. empyreumatiea Sacc. (from its odour of burning; Gr. 



empuros, scorched) a b. 



P. hygrophanous, atomate, rufous, becoming pale. St. silky- 

 furfuraceous, pale sienna. G. adnate with a tooth, distant, 

 veined, rufous to brown-purple ; edge pallid. Flesh colour as St. 



Wooden pavement. Oct. if X 2 J x \ in. Resembles 591. 



918. P. atomata Quel, (from the atomate pileus) a b c. 



P. obtuse, hygrophanous, livid, tan or pale flesh-colour, sometimes 

 reddish. St. white. G. adnate, cinereous-blackish or purple- 

 brown. 



Solitary or gregarious. Woods, hedgerows, waysides, amongst leaves ; 

 common. June-Jan. I X 2§ X ^ in. 



919. P. erenata Gill, (from the scalloped margin of the pileus; 



crenatus, scalloped) a b. 

 P. hygrophanous, atomate, subochreous, rufescent or flesh-colour, 

 then pale; mid. sometimes sienna. St. attenuate below, 



