Gymnosporangium effusum F. Kern 1911

Gymnosporangium effusum Kern, Bull. N. Y. Bot
Gard. 7: 459. 1911.
O and I. Pycnia and aecia uncertain.
On Malaceae ;
Aronia sp., proven by culture as to host, but without maturing aecia. It is possible that no. 22 may belong here.
Telia caulicolous, from a perennial mycelium, usualiy appearing on branches 0.3-1.5 cm. in diameter, causing long slender fusiform enlargements 0.5-2.5 by 15-40 cm., extending into and causing some swelling of the smaller branches and twigs arising from the infected areas, sometimes on the larger trunks, usually breaking forth in series along the branch with the grain of the wood, unevenly disposed, hypertrophied scars of previous seasons frequently interspersed, when dry more or less wedge-shaped, but often irregular and lacunose, sometimes forked or divided and staghorn-like, when mature and expanded 2-3 mm. broad by 2-5 mm. long at base, 7-10 mm. high, the surface more or less rugose, dark chestnut-brown becoming cinnamon-brown after expansion ; teliospores 2-celled, oblongellipsoid, 16-22 by 45-55 /x, rounded or slightly narrowed both above and below, slightly constricted at the septum; wall dark cinnamon-brown, rather thin, 1-2/*, varying in thickness on different spores, the pores 1 or 2 in each cell, near the septum ; pedicel hyaline, cylindrical, uniform, 3-5 ju in diameter, very long.
On Juniperaceae :
Juniperus virginiana L., District of Columbia, New Jersey, New York, South Carolina. Type locality: Santee Canal, South Carolina, on Juniperus virgimana. Distribution : Along the Atlantic coast from New York south to South Carolina.