Part 5, 1916] AGARICACEAE 303 
DOUBTFUL SPECIES 
Agaricus elatinus Pers. Myc. Eur. 3: 18. 1828. ‘The specimens from Cuba so deter- 
mined by Berkeley have been referred to Uvrospora subelatina. 
Lentinus friabilis Fries, Syn. Gen. Lent. 12. 1836. A temperate European species 
erroneously reported from Cuba, Guiana, and elsewhere in tropical America. 
Panus foetens Fries, Epicr. Myc. 399. 1838. Reported from Mexico and South Caro- 
lina. Specimens at Paris collected in South Carolina by Ravenel are hispid-tomentose, with 
distant gills, which are now reddish-brown, resembling Panus alliaceus. 
Pleurotus chioneus (Pers.) Sacc. Syli. Fung. 5: 384. 1887. (Agaricus chioneus Pers. 
Myc. Eur. 3: 28. 1828. Not A. chioneus Fries. 1815.) Reported from Massachusetts by 
Frost and from Alabama by Atkinson. The species is probably not distinct from G. septicum. 
Pleurotus cyphellaeformis (Berk.) Sacc. Syll. Fung. 5: 379. 1887. (Agaricus (Pleurotus) 
cyphellaeformis Berk. Outl. Brit. Fungol. 138. 1860.) Reported from South Carolina by 
Ravenel, but the American specimens do not seem to correspond with the types at Kew. 
Pleurotus flabéllatus (Berk & Br.) Sacc. Syll. Fung. 5: 369. 1887. (Agaricus (Pleurotus) 
flabellatus Berk. & Br. Jour. Linn. Soc. 11: 528. 1869.) A Ceylon species reported by 
Massee from St. Vincent. 
Pleurotus fluxilis (Fries) P. Karst. Bidr. Finl. Nat. Folk 32:90. 1879. (Agaricus fluxilis 
Fries, Syst. Myc. 1: 189. 1821.) Reported from North Carolina by Curtis. 
Pleurotus Hobsoni (Berk.) Sacc. Syll. Fung. 5: 382. 1887. (Agaricus (Pleurotus) Hobsoni 
Berk. Outl. Brit. Fungol. 138. 1860.) An English species reported from Dominica by Miss 
A. L. Smith. 
Pleurotus limpidoides P. Karst. Medd. Soc. Faun. FI. Fenn. 6: 7. 1881. Reported 
from Nebraska by Clements. 
Pleurotus limpidus (Fries) Sacc. Syll. Fung. 5: 364. 1887. (Agaricus (Pleurotus) 
limpidus Fries, Epicr. Myc. 135. 1838.) A temperate European species reported by Fries 
from Costa Rica. Oersted’s colored figure may be seen at Copenhagen, but no specimens 
were found. 
Pleurotus mitis (Pers.) Quél. Champ. Jura Vosg. 226. 1872. (Agaricus mitis Pers. Obs. 
Myce. 1:54. 1796.) Reported from New York by Peck on prostrate trunks of balsam. The 
lamellae of Peck’s specimens have been destroyed by insects. The specimens are nearly as 
white as G. candidissimum and about twice as large. 
Pleurotus perpusillus (Fries) Sacc. Syll. Fung. 5: 383. 1887. (Agaricus perpusillus 
Fries, Syst. Myc. 1: 192. 1821.) Reported from Connecticut by Sprague and from North 
Carolina by Curtis. Typical European specimens resemble G. candidissimum in form and size, 
but have much more distant lamellae. 
Pleurotus pinsitus (Fries) Sacc. Syll. Fung. 5: 374. 1887. (Agaricus pinsitus Fries, Syst. 
Myce. 1: 184. 1821.) Reported from Pennsylvania by Schweinitz and from Ohio by Lea. 
It is referred by some authors to Crepidotus mollis. 
Pleurotus planus (Alb. & Schw.) Quél. Ench. Fung. 149. 1886. (Agaricus planus Alb. & 
Schw. Consp. Fung. 230. 1805. Not A. planus Bolt. 1788.) Reported from North Caro- 
lina by Schweinitz. 
Pleurotus semisupinus (Berk. & Br.) Sacc. Syll. Fung. 5: 373. 1887. (Agaricus (Pleurotus) 
semisupinus Berk. & Br. Jour. Linn. Soc. 11: 529. 1869.) A Ceylon species reported from 
Dominica by Miss A. I. Smith. 
Pleurotus tremulus (Schaeff.) Quél. Champ. Jura Vosg. 79. 1872. (Agaricus tremulus 
Schaeff. Fung. Bavar. 4: Ind. 53. 1774.) Described from Bavaria and reported from Pough- 
keepsie, New York, by Gerard, and from Pennsylvania by Schweinitz. The species approaches 
G. petaloides, but is gray, with nearly globose spores, and occurs among mosses in moist places. 
Gerard’s two specimens at Albany are very thin, gray, attached to moss, about 3 X 2 cm., 
and resemble large forms of Diciyolus muscigenus Quél. Unfortunately, the lamellae are 
glued to the sheet and cannot be examined. 
Pleurotus Zippelit (Lév.) Sacc. Syll. Fung. 5: 382. 1887. (Agaricus Zippelit Lév. Ann. 
Sci. Nat. III. 2: 171. 1844.) A species native to Java, which has been reported from Santo 
Domingo. 
