110 ArrheniaNyctalis. 



* * Pileus sessile. 



[tenella, Fr. P. '5 1 cm. effuso-reflexed, thin, soft, blackish, 

 becoming lobed ; g. vein-like, simple, with shorter ones, dark 



[cupularis, Fr. P. 2 3 mm. resupinate, soft, orbicular, outside 

 even, downy, grey; g. vein-like, simple, radiating from centre. 



Resembles young condition of Pleurotus applicatus. 



[flmicola, Bagl. P. resupinate, thin, concavo-patellate, flesh- 

 colour, with a byssoid border ; veins very slight, distant. 



NYCTALIS, Fr. 



A. SPELEAE. Gills crowded, more or less coalescent. 

 Very doubtful, probably morbid forms of Agarics. 



[verpoides, Fr. P. campan. obtuse, glabrous, brown; g. very 

 thick, coalescent ; s. equal, rigid, striate, glabrous. 



[cryptarum, Seer. Foetid. P. conico-deformed, brown ; g. 

 adnexed, undulate, subcoalescent, flocculose, fleshy-grey; s. unequal, 

 flexuose, hoary-fibrillose. 



[canaliculata, Pers. P. pallid white, oblique, subumbil. almost 

 glabrous ; g. crowded, distinct, almost simple, edge slightly canalicu- 

 late ; s. solid, subundulate, naked. 



caliginosa, W. G. Sin. P. subumb. edge incurved, greyish, white 

 and silky when dry, 1 cm.; g. subdecur. thick, narrow, branched, 

 grey; s. 35 cm. often inflated, whitish, silky, hollow, rusty inside; 

 sp. 5x3. 



B. PARASITAE. Gills distinct from each other, 

 distant. Growing on decaying fungi. 



[nauseosa, Weinm. Smell nauseous. P. fleshy, globose then 

 hemisph. ochraceous, pulverulent, edge involute; g. distant, forked, 

 pallid; s. fistulose, thick, obliquely sulcate and twisted, pallid. 



Larger than N. asterophora. 



asterophora, Fr. P. 1 1'5 cm. conical then hemispher. fawn, 

 mealy with large stellate cpnidia ; g. adnate, distant, rather forked, 

 dingy ; s. 1 1'5 cm. whitish pruinose then brownish, twisted ; 

 sp. 3x2. 



parasitica, Fr. P. 1 2 cm. conical then exp. irreg. with grey 

 meal formed of large, elliptical, smooth conidia; g. adnate, thick, 

 distant, then forked and anastomosing, dusky; s. 2 6 cm. whitish, 

 floccosely downy ; sp. 5 x 3'5. 



[microphylla, Corda. P. hemispher. soft, glabrous, naked, white ; 

 g. adnate, entire, dingy white ; s. glabrous, bluish. 



[vopiscus, Fr. P. cup-shaped, reflexed then recurved, pallid ; g. 

 thick, radiating from centre ; s. short, excentric, curved, flocculose, 

 pallid. 



