58 



A KEY TO THE NORTH AMERICAN SPECIES 

 OF LENTINUS— II* 



By F. S. Earle 



Section Lepidei 



1. Large ; pileus reaching 15 cm. or more. 

 Medium ; pileus 4-10 cm. 

 Small ; pileus less than 4 cm. 



2. Pileus straw-colored with black punctate scales. 

 Pileus white or whitish, areolate- scaly. 



3. Stipe excentric ; cespitose ; spores 13-16 fi X 5-6 H-- 

 Stipe central ; gregarious ; spores 8//X4/'. 



4. Pileus 5-10 cm., scales spot-like, brown ; spores 10-14 /" X 6/U. L. lepideus Fr 

 Pileus 4-6 cm., scales punctate, black ; spores 6-7 // X 3 1" 



L. tigrimts (Bull.) Fr 



5. Pileus sulcate-striate, reddish. L. sulcatus Berk 

 Pileus even on the margin. 6 



6. Cespitose ; pileus yellowish to ferruginous, pilose-squamose. 



L. pholiotoides Ell. & Anders 

 Scattered ; pileus brownish, punctate-squamose. L. Ravenelii B. & C 



2 

 4 

 5- 

 L. maximus Johns. 



3- 



L. Underwoodii Pk 



L. magnus Pk 



Section Cochleati 



1. Stipe glabrous. 

 Stipe velvety or strigose, at least below. 



2. Cespitose. 

 Scattered or only gregarious. 



3. Lamellae brownish, edge white ; stipe hollow. 

 Lamellae whitish ; stipe solid. 



4. Lamellae with the edge serrate. 

 Lamellae with the edge entire. 



5. Pileus deeply umbilicate ; stipe concolorous. 

 Pileus expanded or subdepressed ; stipe short, shining reddish-brown. 



L. haematopiis Berk 



6. Pileus infundibuliform. 7 

 Pileus depressed or umbilicate. 8 



7. Small ; pileus 12-13 mm .; lamellae entire. 



2. 

 6. 



3- 



5- 

 L. friabilis Fr. 



4- 



L. cochleatus Fr. 



L. cochleatus occidentalis Fr. 



L. umbilicatus Pk. 



Larger ; pileus 2-3 cm.; lamellae serrate. 



8. Pileus ochraceous ; stipe dark brown. 

 Pileus alutaceous-fuscous ; stipe pallid. 



* Continued from page 38. 



L. Curtisii. Sacc. & Cub. 

 = L. omphalodes B. & C, not Fr. ) 

 L. Aviericanus Pk. 



L. Michneri B. & C. 



L. detonsus Fr. 



