Comprehensive Description
provided by North American Flora
Phyllosticta minutissima Ellis & Ev. Proc. Acad. Phila
1891: 76. 1891.
Spots subcircular or irregular, reddish -brown, surrounded by a yellowish area which gradually grades off into the healthy tissues of the leaf, with no sharply defined border, reaching a diameter of 5 mm., visibly on both sides of the leaf but much paler on the under side; pycnidia numerous, minute, rather thickly scattered over the infected spot, often congested so that the spots appear blackish, prominent, restricted to the under side of the leaf; spores numerous, very minute, ellipsoid, 0.5-1 X 2 /*.
On Acreaceae:
Acer Douglasii Hook., Montana.
Acer glabrum Torr., Colorado, Nebraska, Wyoming.
Acer pennsylvanicum L., New York, Pennsylvania.
Acer saccharinum L., Wisconsin. Type locality: Sioux County, Nebraska, on Acer glabrum. Distribution: New York and Pennsylvania to Montana and Colorado.
- bibliographic citation
- Fred Jay Seaver. 1922. PHYLLOSTICTALES; PHYLLOSTICTACEAE (pars). North American flora. vol 6(1). New York Botanical Garden, New York, NY
