10 THE DECAY OF TIES IN STORAGE 



Key to the Fungi Described in the Present Paper 



A. Fruiting-bodies provided \vith gills on the lower surface. 



1. Plants of the mushroom type with cap and central stem: 



a. Fruiting-bodies fleshy-fibrous, yellowish; upper surface sticky when 



moist and covered with brownish scales; on hardwoods. Pholiota 

 adiposd. 



b. Fruiting-bodies tough, fleshy-fibrous, white; upper surface of cap 



covered with brown scales. Lentinus lepideus. 



2. Plants with only a short lateral stem: 



a. Fruiting-bodies small, tough, flexible, grayish to tan colored; gills 

 not split at edge; on hardwoods. Panus stipticus. 



3. Plants without a stem : 



a. Fruiting-bodies small, thin, white, tough and leathery when moist; 



gills split longitudinally at edge and halves rolled back; on hard- 

 woods, pines and other conifers. Schizophyllum commune. 



b. Fruiting-bodies medium large, shelving, corky, flexible when moist; 



buff to clay colored or light brown; often concentrically zoned 

 above; on hardwoods. Lenzites betulina. 



c. Fruiting-bodies corky, flexible, medium sized, and russet to dark 



brown in color; upper surface usually velvety to hairy; on conifers 

 only. Lcnzites sepiaria. 



d. Fruiting-bodies as above but near to cinnamon brown; upper surface 



usually not velvety; on hardwoods. Lenzitcs trabea. 



B. Fruiting-bodies with pores on the lower surface. 



1. Plants shelving, densely clustered, thin, tough and flexible when moist; 



upper surface concentrically banded with shades of buff, brown or blue; 

 under surface white; pores small and shallow; on hardwoods. Poly- 

 stictus 1-crsicolor. 



2. Plants as above but usually more loosely clustered; upper surface white, 



hairy; under surface violet in young specimens, becoming brown in 

 older; pores break up into flattened teeth in age; on conifers. Poly- 

 stictus abietinus. 



3. Plants as above; upper surface velvety, whitish to creamy or buff in 



young specimens, becoming concentrically banded and gray behind in 

 age, and losing velvety covering in part; under surface violet in young 

 specimens, becoming brown. Plant splits radially and becomes lacerate 

 at the margin as it matures and weathers; pores break up .into flattened 

 teeth in age; on hardwoods. Polystictus pargamenus. 



4. Plants as above but usually smaller and frequently running together where 



attached to surface of wood; under surface brownish-drab with pores 

 visible to unaided eye: in fresh specimens pore layer stretches like rub- 

 ber when fruiting-body is torn apart; on hardwoods. Gloeoporus con- 

 clioides. 



5. Plants corky, flexible, medium sized, near to cinnamon brown; upper sur- 



face usually not velvety; under surface either with gills or radially 

 elongate pores. Lenzitcs trabea. 



6. Plants tough-fibrous to corky, usually joining at the sides to form long 



fruit bodies which are shelving, thick where attached to wood and 

 project out usually less than half an inch; white when fresh, becoming 

 pale buff in drying; pores large, easily seen by unaided eye; usually on 

 oaks or chestnut. Trametes sepium. 



7. Plants large, shelving, tough, rigid when dry, 3 to 6 inches across and 



y 2 to 24 inch thick, light brown; upper surface often rough to the 

 touch; pores radially elongate or sinuous, easily visible to unaided eye; 

 mainly on willow. Daedalea confragosa. 



8. Plants shelving, tough, corky, becoming woody; pinkish to rosy through- 



out. Fames roseus. 



C. Fruiting-bodies provided with distinct teeth* which project downward. 



1. Plant white, fleshy, succulent, more or less globose; usually on oak. 

 Hydnum erinaceum. 



D. Fruiting-bodies smooth (without gills, pores or teeth) beneath when shelving, 



or on outer exposed surface when spread out flat on the wood: 

 1. Plants shelving, arranged one above the other: 



a. Fruiting-bodies thin, flexible; upper surface clay colored to slate 



colored; lower surface light brown; on hardwoods. Stereum 

 fasciatum. 



b. Fruiting-bodies as above but usually much smaller; lower surface 



orange-yellow; upper surface paler; on hardwoods. Stereum 

 rameale. 



* Polystictus pargamenus and Polystictus abietinus also have flattened tooth- 

 like plates, due to the breaking up of the walls of the pores in age. 



