236 Proceedings of Indiana Academy of Science 



Phyllosticta Labruscae Thuem. On living leaves of Avipelopsis ti-i- 

 cuspidata, Monroe County, June 14, 1920. 3801. 



Phyllosticta melaleuca E. & E. On living leaves of Ubnus americana, 

 Monroe County, July 13, 1923. Hawkins. 3957. This species, de- 

 scribed in North American Phyllostictas, p. 43, in 1900, was ap- 

 parently not placed in Saccardo. The spots are small and circular. 

 Pycnidia, 75 to 150, with pore 25 to 30. Spores, 2.5 to 3 by 5 to 6, 

 elliptical, dark olive and appearing dark yellow in mass. Very 

 numerous. A close observation of our specimens suggests a Conio- 

 thyriuni rather than a Phyllosticta. 



Phyllosticta minima (B. & C.) E. & E. On living leaves of Acer riibrum, 

 Kerr Creek, June 22, 1922. 3783. Griffey Creek, June 18, 1923. 

 3947. Also on Acei- sacchai-inuin on small bushes mixed with num- 

 ber 3947, and on the latter host on small bushes near ground on the 

 Campus. 3949. This is one of our most common leaf diseases and 

 abounds in early June on maples particularly on north hillsides. 

 This species seems to be identical with P. acerioola C. & E. Our 

 description which varies somewhat with the original is as follows: 

 Spots usually few and small, 1 to 5 mm. in diameter, sometimes 

 larger or by confluence spreading over a large portion of the leaf, 

 cii-cular or angular, olive brown to sepia above, with small (1 mm.) 

 pale center, hair brown below; pycnidia almost wholly epiphyllous, 

 scattered over the entire spot but not occurring to any extent in 

 the light-colored center of the spot, 65 to 120 microns, usually 

 about 90, with a distinct pore averaging 12.5 in diameter; spores 

 5 to 7 by 8 to 10, ovate, elliptical or subspherical (tending to 

 angular sometimes when dried) granular, hyaline and surrounded 

 by a thin coat of slime. 



Phyllosticta Paviae Desm. On leaves of seedlings of Aescuhis glabra, 

 Marion County, April 30, 1921. 3897. Monroe County, August 1, 

 1920. 3820. This is among our earliest Imperfects to develop and 

 should be collected in the early spring months to assure the finding 

 of an abundance of spores. It is occasionally quite destructive to 

 the leaves of .small plants. (See specimen number 97, Underwood's 

 Indiana Flora, collected in Brown County. For a detailed account 

 of this species, see Phytopathology, VI, pp. 5 to 19, by V. B. Stewart.) 



Phyllosticta solitaria E. & E. On leaves and fruit of apple, Monroe 

 County, August 1, 1922. 3929. July 4, 1923. Hawkins. 3956. The 

 single, or at most, two or three pycnidia, in all examinations made 

 (upon loaves from specimen 3956) contained spores. According to 

 111. Circ. 241, "Within the spots on the leaves pycnidia are formed, 

 but according to most authorities remain sterile, that is, no spores 

 are produced". The small spots on leaves are often triangular, 

 quadrilateral, etc., detei-mined by leaf veins which limit them. Our 

 spores from fruit and leaves are 8 to 10 by 5 to 7 making them 

 broader than usually given. The pycnidia range from 75 to 100. 

 Pore, 10 to 13, in diameter. Within the past decade, this has grad- 

 ually become one of the most important apple diseases in this sec- 

 tion of Indiana, where it does great injury to leaves, fruit and 



