FUNGI OF IMPORTANCE IN THE DECAY OF TIMBERS. 23" 
Trametes serial is: 
Secondary mycelium — 
Submerged. 
Colorless ; 3.3 to 6.3 fi ; septa relatively few, far apart in some 
hyphse, close together in others ; clamps very few and small ; branch- 
ing more frequent than in aerial vegetative mycelium, may begin as 
close to growing tip as 150 fi, but usually farther back; contents of 
young hyphse homogeneous, with occasional angular crystals ; chlamy- 
dospores fairly common, varying more or less with age of culture, 
very abundant in old cultures ; colorless, ellipsoid, fairly thick walled, 
4.5 to 10X7 to 21 /*, occurring intercalarily. 
Aerial. 
Vegetative mycelium : Colorless ; 1.5 to 3.6 ^ ; septa and clamps 
fewer than in fruiting mycelium, but fairly abundant ; branching 
irregular, not abundant, not necessarily at right angles, with forking 
common ; hyphse straight for the most part, contents homogeneous ; 
anastomosing occasional; chlamydospores few, similar to those on 
submerged mycelium. 
Tertiary mycelium (aerial) — 
Fruiting mycelium : Colorless ; 4 to 6.6 /x ; of unequal thickness, much 
of it with contents gone and only walls left ; abundant protuberances, 
round or bluntly pointed ; branching common, usually at clamps ; septa 
and clamps abundant ; anastomosing common ; chlamydospores as above. 
Fomes roseus: 
Secondary mycelium — 
Submerged. 
Colorless ; 0.8 to 3.6 /t, occasionally 4.6 fi, with much small my- 
celium ; septa and branching not abundant ; clamps not observed ; 
branching begins near tip of young growing hyphse; no secondary 
spores observed. 
Aerial. 
Colorless; smallest hyphse 0.8 to 1 ft, more commonly 2 to 3.1 n, 
occasionally 3.8 to 4.7 ^; septa not abundant; branching not abun- 
dant ; may or may not be at septa ; clamps few ; anastomosing of 
smaller hyphse occasional; no secondary spores observed. 
Tertiary mycelium (aerial) — 
Colorless, pinkish in mass; 2 to 3 /x ; no branches or clamps; stiff, 
hairlike. 
Lentinus lepideus: 
Secondary mycelium — 
Submerged. 
Colorless ; 3.5 to 4 /* ; septa abundant, hyphse constricted at septa ; 
branching may begin near tip of growing hyphse, not necessarily at 
septa or clamps ; clamps fairly abundant ; anastomosing occasional at 
clamps ; chlamydospores colorless, thick-walled, usually ellipsoid, oc- 
curring intercalarily or terminally on short lateral branches ; 8 to 
14 X 10 to 20 p. 
Aerial. 
Colorless ; 2 to 3 /x ; branching common, also septa ; clamps few ; 
chlamydospores colorless, 8 to 14 X 10 to 29 fi, usually ellipsoid, oc- 
casionally ovoid or ellipsoid-oblong, usually terminal, but occasionally 
intercalary, commonly empty, commonly showing secondary walls due 
to contraction of contents. 
