Phyllosticta apocyni

Phyllosticta apocyni Trel. Prel. List Fungi Wis. 17
N 1884.
Phyllosticta Apocyni Ellis & Martin, Am. Nat. 18: 1264. D 1884.
Spots nearly circular in form, brown or yellowish-brown, becoming whitish with age. surrounded by a very narrow, blackish, slightly elevated border, reaching a diameter of 2-3 mm., visible on both sides of the leaf but more distinct on the upper surface; pycnidia few, scattered over the infected spot, black, reaching a diameter of 75-100 /jl, restricted to the upper side of the leaf; spores large, rather variable in form, ellipsoid, ovoid, pyriform, or subglobose, usually about 6-7 X 10 i t granular within.
On Apocynaceae:
Apocynum androsaemifolium L., New York.
Apocynum cannabinum L., New Jersey, Wisconsin. Type locality: LaCrosse, Wisconsin, on Apocynum cannabinum. Distribution: New York and New Jersey to Wisconsin.