22 Bulletin 313 



ScLEROTiNiA FRUCTIGENA (Pers.) Schr. — On the fruit, flowers, 

 leaves and stems of peach, plum and cherry, and other drupaceous 

 fruits. Causes a rotting of the fruit; dying of blossoms, young 

 twigs and young shoots early in the season; and the formation of 

 cankers on the twigs and smaller branches. The conidial stage 

 {Monilia friictigcna Pers., page 114) is most conspicuous on fruits, 

 many of which cling to the tree as mummies. The conidiophores 

 and conidia in mass appear as a dense gray, bro\vnish or ochraceous 

 mold-like growth. The conidia measure about 20.9 x 12.1 /a. The 

 apotliecia are rare in Xew Jersey. They are produced from the 

 sclerotia on the fallen mummied fruits and measure about 0.5-3 cm. 

 in height; the stem is dark brown and the disk somewhat lighter 

 and measures about 5-8 or occasionally as much as 15 mm. in diame- 

 ter; asci 125-215 x 7-10 n; ascospores ellipsoidal and 10-15 x 5-8 /i. 



63. Infected peach twig showing cankers. 64. Chain of conidia, 1/6. 65. 

 Same, 1/12. 66. Germinating conidia, 1/6, 1/12. 67. Apothecia from mum- 

 mied fruit. 68. Ascus, 1/12. 



PsEUDOPEZiZA MEDiCAGiNis (Lib.) Sacc. — On leaves of alfalfa. 

 Causing irregularly distributed circular, yellowish to brown or 

 black spots which are visible on both surfaces of the leaf but most 

 prominent on the upper ; boundar}' slightly irregular and not sharply 

 defined; varying from mere specks to about 1.5 to 2 mm. in diame- 

 ter. The spots appear early in the season but the apothecia are 

 rather slow in forming and are usually most abundant in the fall. 

 The apothecia are ver}- small, amber or black shiny elevations. The 

 asci are elongated and contain 8 spores ; the paraphyses are filiform 

 to clavate; the spores are hyaline, non-septate, elliptical and 8-11 x 

 4-6 /Lt. 



69. Infected leaf of alfalfa. 70. Surface view of the apothecia, 2/3. 71. 

 Cross-section of same. 2/3. 72. Asci, 1/12. 73. Ascospores, 1/12. 74. Para- 

 physes. 1/12. 



PsEUDOPEZiZA RiBis Kelb. (= Gloeosporium ribis (Lib.) M. & D., 

 page 102). 



PsEL^DOPEZiZA SALicis (Till.) Pot. (= Gloeosporium salicis West., 

 page 102). 



PsEUDOPEZiZA TRiFOLiT (Pers.) Fckl. — On leaves of clover. 

 Causes brown or yellowish-brown oval or irregular spots, some- 

 times with light centers, and about 0.5 mm. in diameter. Conidia 

 in numerous small, light-brown cup-shaped pAxnidia, and are ovoid- 

 oblong and 5 /x, bi-guttulate ; asci and ascospores similar to those of 

 P. medicaginis and measure about 10-14 x 5-6 ^. Ascocarps de- 

 velop on the dead spots; ascospores elliptic, 10-14 x 5-6 jx. 



75. Infected leaf of clover. 76. Asci and paraphyses, 1/12. 77. Asco- 

 spores, 1/12. 



