MILDEWS, RUSTS AND SMUTS 
171 
GYMNOSPORANGIUM, Hedw. 
Aecidia. Peridium elongated or horn-like, in clusters; 
spores produced in basipetal chains, with alternating sterile 
cells, 
Teleutospores. Mass of spores more or less gelatinous 
when moist, horny when dry, usually forming rather large 
masses of a dull orange colour, and oozing out from the 
matrix ; spores i-septate, elongate, with 2—^4 germ-pores. 
The teleutospores of all species grow on Junipers, the 
m5^celium is perennial in the branches, and the teleutospores 
are produced in the spring. 
Gymnosporium sabinae. Winter ; Plowr., Ured., p. 230. 
Aecidia. Produced on orange, then reddish, more 01 less 
circular, thickened spots, elongated or flask-shaped, pale 
brown, finally splitting lengthwise into shreds, which remain 
for a long time fixed together at the tip ; spores subglobose, 
minutely warted, brownish, 30—45 [i. 
Teleutospores. Mycelium perennial, causing spindle- 
shaped swellings on the branches, spore masses irregularly 
cylindrical or club-shaped, often flattened, blackish and 
firm, then reddish-brown and gelatinous ; spores i-septate, 
spindle-shaped, usually constricted at the septum, 3^el- 
lowish-brown or chestnut-brown, 35—55 x 20—30 p, 
four germ-pores. Some teleutospores have a thin, colour¬ 
less wall, in others the wall is thicker and dark coloured, 
Aecidia on leaves of pear— Pyrus communis. 
Teleutospores on branches oi Juniperus sahina. 
Gymnosporium clavariaeforme, Winter ; Plowr., IJred., 
p. 233. 
Aecidia. Seated on yellow, thickened spots, at first 
flask-shaped, then cylindrical, pale brown, becoming torn 
into shreds at the tip ; spores subglobose, minutely warted, 
pale brown, 25^—45 p diam. 
Teleutospores. Mycelium perennial, causing spindle- 
shaped swellings of the branches, spore masses flattened, 
sometimes forked, firm, then gelatinous, pale orange ; 
spores spindle-shaped, constricted at the septum, dark 
yellow, 70—120 X 15—25 p. 
85/0. Tremella clavariaeformis, Jacq. 
Podisoma jiiniperi, Fries. 
Aecidiitm laceratum, Sow. 
Roestelia lacerata, Tul. 
Aecidia on Crataegus oxyacantha, and on pear— Pyrus 
communis. 
