186 NORTH AMERICAN FLORA [Vo_umE 10 
Berk. & Curt. Proc, Am. Acad. 4: 116. 1858.) Described from specimens collected.on damp 
hillsides, Bering Strait. Type not seen and description inadequate. 
Naucoria pusiola (Fries) Gill. Champ. Fr. 546. 1876. (Agaricus pusiolus Fries, Syst. 
Myce. 1: 264. 1821.) Incorrectly reported from South Carolina by Ravenel. 
Naucoria pygmaea (Bull.) Gill. Champ. Fr. 544, 1876. (Agaricus pygmaeus Bull. Herb. 
Fr. pl. 525, f. 2; hyponym. 1791; DC. Fl. Fr.2: 166. 1805.) Reported from Ithaca by Atkin- 
son on Bresadola’s determination. 
Naucoria reducta (Fries) Sace. Syll. Fung. 5: 849. 1887. (Agaricus reductus Fries, 
Monogr. Hymen. Suec. 379. 1857.) Reported from Greenland by Rostrup. : 
Naucoria segestria (Fries) Quél. Champ. Jura Vosg. 234. 1872. (Agaricus segestrius 
Fries, Syst. Myc. 1: 262. 1821.) Reported from New Jersey by Ellis as occurring among 
mosses in a swamp, whereas the species occurs in Sweden on twigs and wood. 
Naucoria sideroides (Bull.) Quél. Champ. Jura Vosg. 99. 1872. (Agaricus sideroides 
Bull. Herb. Fr. $1. 588; hyponym. 1793; Bull. & Vent. Hist. Champ. Fr. 1: 574. 1809.) 
Reported by Berkeley from Wright’s Cuban collections, but evidently a wrong determination. 
Naucoria siparia (Fries) Gill. Champ. Fr. 542. 1876. (Agaricus siparius Fries, Syst. 
Myce. 1: 261. 1821.) Reported from Michigan by Kauffman, as occurring there on soil 
or among mosses. 
Naucoria subglobosa (Alb. & Schw.) Sace. Syll. Fung. 5: 830. 1887. (Agaricus sub- 
globosus Alb. & Schw. Consp. Fung. 169. 1805.) Reported from South Carolina by Ravenel. 
See N. pascuensis. 
Naucoria tabacina (DC.) Gill. Champ. Fr. 547. 1876. (Agaricus tabacinus DC. FI. Fr. 
5:46. 1815.) Reported from Massachusetts by Davis and from Michigan by Kauffman. 
Naucoria vervacti (Fries) Quél. Champ. Jura Vosg. 100. 1872. (Agaricus vervacti Fries, 
Syst. Myc. 1: 263. 1821.) Reported from Rhode Island, Ohio, and Kansas by the older 
mycologists, but probably confused with N. semiorbicularis. 
68. PLUTEOLUS (Fries) Gill. Champ. Fr. 549. 1876. 
Agaricus § Pluteolus Fries, Hymen. Eur. 266. 1874. 
Pileus fleshy, putrescent, the margin straight and appressed when young; lamellae free, 
rarely adnexed; spores ochraceous, ferruginous, or fulvous; stipe central, slender, tubular, 
cartilaginous; veil none. 
Type species, Pluteolus reticulatus (Fries) Gill. 
I. SPECIES OCCURRING IN TEMPERATE NORTH AMERICA, EXCEPT THOSE CONFINED TO THE 
PAciFIC COAST 
Pileus 1-2 cm. broad. 
Pileus olivaceous, the umbo chestnut-colored. 1. P. callistus. 
Pileus grayish-stramineous, fuscescent. 2. P. glutinosus, 
Pileus 2.5-8 cm. broad. 
Pileus white. 3. P. albus. 
Pileus pale-yellow, sometimes brownish-tan-colored. 4, P. versicolor. 
Pileus pinkish-gray. 5. P. coprophilus. 
Pileus brownish-yellow. 
Stipe 4-7 cm. long, 2-4 mm. thick. 6. P. flavellus, 
Stipe 7.5-10 em. long, 2 mm. thick. 7. P. expansus. 
Pileus brown or fuliginous. 
Pileus hygrophanous; species occurring in sandy Iqam. 8. P. brunneus. 
Pileus viscid; species occurring on rotten logs. 9. P. mucidolens. 
II. SPECIES CONFINED TO THE PACIFIC coast 
Pileus stramineous or cremeous. 
Pileus 1-2.5 em. broad. 10. P. cremeus. 
Pileus 2.5—5 em. broad. 
Stipe 2.5-5 cm. long. ll. P. californicus. 
: Stipe 10 cm. long. 12. P. stramineus, 
Pileus luteous, 2-3.5 em. broad. 13. P. luteus. 
Pileus dark-avellaneous, 1 cm. broad. 14. P. parvulus. 
Ill. SPECIES CONFINED TO TROPICAL NORTH AMERICA 
Pileus isabelline, paler on the margin. 15. P. jamaicensis. 
