I04 Field Columiuan Museum — Botany, Vol. i. 



Spots 4 to 6 mm. diameter, deciduous, grayish-white, with a nar- 

 row black border. Perithecia epiphyllous, scattered, iootoiio,a 

 diameter, convex-prominent above, visible also below.* Sporules 

 narrow-elliptical, hyaline, 2-nucleate, 5 to 6 x 2 to 3 ,a. 



Differs from P. toxica, E. & M., in its larger deciduous spots 

 with a narrow border, and its narrow-elliptical sporules. 



P. lindericola E. & E., Proc. Phila. Acad., 1894, 354. 



Type habitat: On leaves Benzoin Benzoin, Aug. 26, 1894 i^Nutt- 

 all, discov. 1688, 593). 



Spots various; punctiform and minute without any definite 

 border, often irregular in shape i mm. to i or 1.5 cm. diameter, or 

 marginal, forming a narrow strip along the edge of the leaf for 

 half its length, pale brown, nearly the color of weather-beaten 

 wood, with a dark (almost black) border. Perithecia epiphyllous, 

 hemispherical, 100 to 120 p. diameter, covered by the blackened 

 epidermis which is raised into pustules barely pierced at the 

 apex. Sporules oblong-elliptical, hyaline, 4 to 7 x 2 to 3 //. 



This differs in almost every respect from Pli. Linderce E. & E. 



P. Smilacis subeffusa E. & E. 



On Sniilax rotitndifolia, Sept. 21, 1894 {Nuitall, 1701, 594). 

 Perithecia scattered over surface of dead dry leaves of the host. 



P. Oxydendri E. &. E., sp. nov. 



Type habitai: On leaves of Oxydendron arboreiini, Oct. 10, 1894 

 {Nutiall, discov. 171 7, 605). 



Spots suborbicular or elliptical, reddish-gray, 3 to 8 mm. diam- 

 eter, with a narrow, slightly raised dark red border, beyond which the 

 leaf is generally shaded reddish-purple. Perithecia epiphyllous, 

 subapplanate, 100 to 120 , a diameter. Sporules oblong-elliptical, 

 2-nucleate, hyaline, 7 to 8 x 2.5 to 3 //. The spots finall}' become 

 of a lighter, dirty-white color. 



P. Celastri E. & E., sp. nov. 



Type habitat: On leaves Celasirus scandens, Oct., 1894 {N^utt- 

 all, discov. 1718, 606). 



Spots mostly marginal, 8.5 to i cm. diameter, ferruginous, defi- 

 nite, with a narrow, darker border. Perithecia epiphyllous, subap- 

 planate, 150 II. diameter. Sporules oblong, 7 to 10 x 2 to 2.5 //. 

 hyaline, 2-nucleate. 



P. globifera E. & E., sp. nov. 



Type habitat: On leaves Cornus florida, Oct. 24, i^<^\{Nnttall, 

 discov. 1728, 615). 



Spots marginal, light-brown, continuous, extending across the 

 tip of the leaf and partly down each side, 5 to i cm. wide, sepa- 

 rated from the green part of the leaf by a narrow, purple margin. 

 Perithecia amphigenous, discoid, black, 100 to 1 12 //. diameter. 

 Sporules globose or short-elliptical, h^^aline, granular, 6 to 8 x 5 

 to 6 //. 



P. Negundinis Sacc. 



On Acer Negiindo, '\\x\y 5, 1894. Sporules 5 to 10 x 3 to 7.5 // 

 {Nut tall, 1 63 1, 560, 561 ). 



