Phyllosticta saccharina

Phyllosticta saccharina Ellis & Martin, Jour. Myc. 2: 130. 1886
■
Spots minute, scarcely exceeding 1 mm. in diameter but occasionally several coalescing and giving rise to a compound spot several mm. in diameter, white or whitish, surrounded by a circular or subcircular brownish border, the whitish center very thin and often breaking out and giving the leaf the appearance of having been stuck full of pin-holes; pycnidia few,
i
rarely exceeding 2 or 3 to each spot, occurring on either side of the leaf, reaching a diameter of 100-125 m, the ostiola indistinct; spores numerous, short-cylindric, the ends rather blunt, reaching a length of 15-16 m or rarely as long as 20 /jl and as broad as 2-3 p, straight or occasionally slightly curved (also smaller ones described, 1.5 X 3ju).
On Aceraceae:
Acer saccharum Marsh. (A. saccharinum Wang, not L-), Missouri.
Acer platanoides L., Columbia, Missouri. Type locality: Missouri, on Acer sacc -.arinum. Distributi -n: Missouri.