- 
1917] SAW YER—PHOLIOTA 207 
rotten coniferous wood, presumably Picea rubra. Material of all 
3 species was very abundant in several different localities, and in 
each case the young stages selected were identified beyond the 
possibility of a doubt by mature specimens associated with them. 
An abundance of material in all stages of growth was fixed in 
Carnoy’s fluid and carried into cedar oil before returning to Ithaca, 
where it was imbedded, some in paraffin and some in collodion, and 
sectioned for study. 
Pholiota squarrosa 
Young fruit bodies, in the stage of development shown in fig. 1, 
are elliptical or elongate in outline and composed of hyphae loosely 
interwoven in the basal region, but more compact toward the apex, 
with some of the threads radiating from the summit. Scattered 
through the tissue of the fruit bodies are hyphal threads, somewhat 
straighter and more even in diameter than the ordinary hyphae, 
which are Cepines because of het property of inking a very 
deep stain. Thesed ly in the 
youngest basidiocarps, but in successive stages of riage and 
in all 3 species studied. Their function is unknown, but probably 
they serve some special purpose in nutritio ‘ les oe has been 
shown to occur in large q (Phallus, et al.) asa_ 
reserve food material, utilized during growth, ‘and it may be that > 
these peculiar threads owe their deep-staining sci ea to ced ) 
presence of this substance. - 
DIFFERENTIATION OF STEM FUNDAMENT. in the ‘frait bly 
shown in fig. 1 a small, deeply staining area occurs in the central 
and in 
‘verve eal, the : ah 
apical Part; this i is a region of active penth, with ee a c 
fruit body. ‘This region marks | 
would i in all probability be pacary : 
fruit body,as shown in fig. 25 f ot peieinete 
