354 
Journal of Agricultural Research 
Vol. I, No. 4 
DESCRIPTION OF SPECIES OF GYMNOSPORANGIUM 
Gymnosporangium chinensis, n. sp. 
.Ecia unknown. 
Telia epiphyllous or caulicolous, appearing on the very small green twigs between 
the leaves, not causing a fasciation of the young shoots; scattered; usually hemis¬ 
pheric; about i mm. in diameter; hazel in color when desiccated. 
Teliospores 2-celled; spores with colored walls, oval to broadly ellipsoid, 19 to 22 
by 35 to 40 jtz (average for 10 spores, 21 by 36.7 jtz), slightly but plainly constricted at 
septum. The two cells are usually subequal; spores rounded at both ends, walls 
thin, about 1 to 1.5 ji, pedicel cylindric; pores, one to two in each cell near septum, 
or rarely only one in upper cell and apical. 
Spores with thin colorless walls, ellipsoid, 17 to 19 by 47 to 52 fi (average for 10 spores, 
18 by 49 /z), plainly constricted at septum. The two cells are unequal, the lower being 
from 3 to 7 n longer than the corresponding upper cell; apical cell rounded or only 
slightly narrowed toward apex, lower narrowed toward base; wall thin, colorless, 
about 1 fi thick; pores, one to two in each cell near septum, or usually only one in 
upper cell and apical. 
Host plant.—On Juniperus chinensis in the Elm City Nursery, Westville, Conn., 
March 28, 1911, on stock just imported from Japan. In same packet with Gymno¬ 
sporangium japonicum on the same host. From the herbarium of Dr. G. P. Clinton. 
Gymnosporangium japonicum Syd. 
Telia caulicolous on fusiform enlargements, 4 cm. or more long, of the woody stems,, 
irregular tongue or wedge shaped, about 3 mm. or more long, often in rows. 
Teliospores 2-celled, occasionally 3-celled; spores with thick colored walls, ellipsoid, 
22 to 24 by 48 to 63 /z (average size for 10 spores 22 by 54.7 /z), cells subequal or lower 
longer and more narrowed at base, not constricted at septum, narrowed at both ends; 
walls 1.5 to 2 g thick, pores near septum, two in each cell. 
Spores with thin colorless walls, elliptic fusiform to linear oblong, 16 to 19 by 57 to 
70/z (average for 10 spores 16.8 by 65 /z), walls 1 jtz thick, not constricted at septum;, 
pores, two in each cell near septum. 
Host plant.—On Juniperus chinensis from Japan. 
Gymnosporangium haraeanum Syd. 
(Sydow, H., and Sydow, P. Novae fungorum species—VIII. Ann. Mycol., v. 10, 
no. 4, p. 405, 1912.) 
Telia epiphyllous or caulicolous on the very small green twigs, not causing a fascia¬ 
tion of the young shoots; scattered; hemispheric to short conic; one-half to 1 mm. 
in size. 
Teliospores 2-celled; spores with very thick colored walls, ellipsoid, 25 to 28 by 
35 to 44 fi (average size for 10 spores 25.7 by 39 fi), not or but very slightly constricted 
at the septum; spores rounded or somewhat narrowed at both ends; the two cells 
subequal or the lower often larger $nd more narrowed toward the base than the upper 
one; walls very thick, 3 to 4 ft; pores, two in each cell near septum; pedicel cylindrical. 
Spores with walls moderately thick and colored, elliptic oblong, 22 to 26 by 48 to 57 /z 
(average for 10 spores 23.6 by 52 fi), not or but slightly constricted at septum; spores 
usually much narrowed at both ends; upper cell often with a mammillate apex; 
lower cell often longer than upper; walls 2.5 to 3 /z thick; pores, two in each cell near 
septum. 
Spores with walls thin and colorless, oblong to oblong fusiform, 16 to 19 by 48 to 57 fi 
(average size for 10 spores 17 by 51 jtz), rarely constricted at septum; cells subequal, 
rounded or narrowed at both ends; pores, two in each cell near septum; walls about 
1 fi thick. 
* Host plant.—On Juniperus chinensis from Japan. 1 
1 This description was made irom a portion of the type material which Dr. Sydow kindly sent to the 
writer. * 
