56 
Mycologia 
2. PoLYSCYTALUM SERicEUM Sacc. Michelia 1 : 86. 1879 
Effused or cespitose, white to sordid white ; sporophores short 
or somewhat elongated, septate; spores concatenate, cylindric, 
ends obtuse, hyaline, 2.5-3 X 
On oak leaves. 
Specimens examined; Canada, Harkness; New Jersey, Fung. 
Columb. /J57; Pennsylvania, Sumstine. 
GeoTRicHUM Link, Berl. Mag. 3: 17. 1809 
Original description : Thallus e floccis caespitosis septatis, 
ramosis, decumbentibus. Sporadia ovalia, utrinque truncata, 
inspersa. 
Mycelium scanty, floccose, septate, effused or cespitose; sporo- 
phores short, simple or branched ; spores borne on the ends of the 
sporophores in chains, short cylindric, hyaline or light-colored. 
Type species. Geotrichum candidum Link. 
Key to the Species 
Pulvinate, spores 5-12 /x long. i. G. candidum. 
Effused, spores shorter. 2. G, cuboideum. 
1. Geotrichum candidum Link, /. c. 
Small white tufts; mycelium scanty, creeping; sporophores 
erect, simple or branched, septate, hyaline ; spores short cylindric, 
hyaline, 3-4 X 5-12 /u,; the length varies but the thickness is rather 
constant. 
On various substrata. 
Specimens examined: New Jersey, Ellis. 
2. Geotrichum cuboideum (Sacc. & Ellis) 
Oospora cuboidea Sacc. & Ellis Michelia 2 : 576. 1880. 
Effused, forming a thin powdery coat over the substratum, 
white; mycelium branching, interwoven ; sporophores erect, short ; 
spores in chains, cuboid, irregular, 2^3 X 3~4 f»- 
On decaying wood. 
Specimens examined: New Jersey, Ellis. Probably part of 
the original collection. 
