Murrill : Clitocybe in North America 
281 
NORTH AMERICAN SPECIES OE MONADELPHUS 
Monadelphus caespitosus (Berk.) Murrill, Mycologia 3:192. 
1911 
Lentiniis caespitosus Berk. Loud. Jour. Bot. 6:317. 1847. 
Agaricus (Pleurotus) caespitosus Berk. Jour. Linn. Soc. 10 : 287. 
1868. 
Agaricus monadelphus Morgan, Jour. Cine. Soc. Nat. Hist. 6:69. 
188^. 
Clitocybe monadelpha Sacc. Syll. Fung. 5:164. 1887. 
Pleurotus caespitosus Sacc. Syll. Fung. 5 : 352. 1887. 
Clitocybe aquatica Banning & Peck ; Peck, Ann. Rep. N. Y. State 
Mus. 44:180 (68). 1891. 
Armillaria mellea exannulata Peck, Ann. Rep. N. Y. State Mus. 
46:134 (54). 1893. 
Clitocybe parasitica Willcox, Okla. Agric. Exper. Sta. Bull. 49 : 
18. 1901. 
This species has been much discussed both in America and 
Europe, some claiming that it is distinct and others that it is 
only a variety of Armillaria mellea. Bresadola says it is the 
same as Agaricus tabescens Scop., figures of which appear to be 
darker throughout than our plant, although very similar. Peck 
says it differs from Armillaria mellea in its decidedly decurrent 
lamellae, solid stipe, more agreeable flavor, and the absence of an 
annulus. Both Curtis and Peck considered it edible, but Sterling 
said it made him very ill on three different occasions and was a 
dangerous species. It occurs in dense clusters about old stumps 
from New York to Kansas and south to Alabama and British 
Honduras, being more common in the southern United States. 
Specimens at Kew from Cuba bearing this name are entirely 
distinct. 
Monadelphus illudens (Schw..) Earle, Bull. N. Y. Bot. Card. 
5 : 432. 1909 
Agaricus illudens Schw. Schr. Nat. Ges. Leipzig 1:81. 1822. 
Agaricus (Pleurotus) facifer Berk. & Curt. Ann. Mag. Nat. 
Hist. II. 12:421. 1853. 
Clitocybe illudens Sacc. Syll. Fung. 5: 162. 1887. 
