July 1905] Gomphidius Rhodoxanthus Once More 105 
% 
rot develops the more regular are the rings of pustules. In many 
cases the decaying areas are found near the basin and cup ends 
of the apple along with apple scab fungus, in codling moth bur¬ 
rows, and in bruised places but over 50 per cent, of the cases 
observed show that the fungus enters directly through the epider¬ 
mis of the fruit. 
Moisture and temperature exert a marked influence on the 
development of the rot. In cool, dry weather the.spots increase 
in size, but few pustules are developed. During cool, damp 
weather an abundance of pustules were found. There is also a 
tendency for varieties of fruit to decay more rapidly than others. 
Examination of the fungus in numerous collections of in¬ 
fested bark gave forms that did not fully agree with the descrip¬ 
tions by Cordley and Peck. The description of the fungus as 
observed in these investigations is as follows: 
Parasitic in the bark and saowood of the trunk and the 
X 
branches and on the stored fruit of the cultivated apple. 
In the Bark. — Infested areas depressed, dark brown to black¬ 
ish, oblong in outline one-fourth to six inches in length or longer; 
sometimes merging together when fully grown, free from the 
sapwood and bounded by a ragged fissure; acervuli (pustules) 
abundant, irregularly but quite equally distributed; round to ob¬ 
long 200-900 mmm. in length, averaging 400-700 mmm., ruptur¬ 
ing the epidermis, exposing a creamy white mass, later becoming 
black; pycnidia absent ; stroma usually flattened rarely concave, 
bearing numerous simple or branched, septate conidiospores as 
long as, or longer than the conidia; conidia borne acropetally, 
non-septate, hyaline or rarely with a greenish tint, oblong, genicu¬ 
late or usually curved 3.8-5 mmm. x 15-20 mmm. 
On the Fruit. — Decaying spots light to dark brown, con¬ 
cave, dry and leathery; acervuli numerous, usually larger than 
those in bark, usually concentrically arranged; stroma as de¬ 
scribed above; conidiospores longer, usually much branched, co¬ 
nidia varying much in size and shape, as long as 30 mmm. 
GOMPHIDIUS RHODOXANTHUS ONCE MORE. 
D. R. SUMSTINE. 
Agaricus rhodoxanthus Schweinitz, Syn. Car. p. 83. 1822. 
Gomphus rhodoxanthus Schweinitz, Syn. N. A. F. p. 151. 1834. 
Paxillus flavidus Berk. Decades N. A. F. 116. 
Flammula rhodoxanthus Lloyd. Mycolog. Notes. Herbst, Fung. Flora 
Lehigh Valley. 
Schweinitz changed the name from A. rhodoxanthus to 
Gomphus rhodoxanthus in his Synopsis in 1834. Fries in his 
