DESCRIPTION OF PLATES. 



All drawings show a magnification of 417 diameters unless otherwise indi- 

 cated. 



Plate I. Species of Cercospora from various hosts, No. 1. Fig. 1. — Three 

 spores of Cercospora vignae Racib. on cowpea {Vigna unguiculata (L.) 

 Walp.). Fig. 2. — Three spores of C. cruenta Sacc. on Vigna unguiculata 

 (L.) Walp. Fig. 3. — Conidiophores and spores of C. florieola Heald and 

 Wolf on Yucca rupicola Sheele; also three spores above. Fig. 4. — Conidio- 

 phores and spores of C. atricincta Heald and Wolf on zinnia (Crassinoi 

 elegans (Jacq.) Kuntze). Fig. 5. — Conidiophores and spores of G. lythra- 

 cearum Heald and Wolf on pomegranate (Punica granatum L. and Var.). 

 Fig. 6. — Conidiophores and spores of G. lythracearum Heald and Wolf on 

 crape myrtle (Lagerstroemia indica L.). Fig. 7. — Conidiophores and spores 

 of C. macromaculans Heald and Wolf on Syringa sp. Fig. 8. — Conidiophores 

 and spores of C. aurantia Heald and Wolf on orange (Citrus aurantium 

 sinensis L.). 



Plate II. Species of Cercospora from various hosts, No. 2. Fig. 1. — Conidio- 

 phores and spores of Cercospora nasturtii Pass, on water cress (Radicula 

 nasturtiwn-aquaticum (L.) Britten and Rendle). Fig. 2. — Conidiophores 

 and spores of G. lanuginosa Heald and Wolf on Bumelia lanuginosa 

 (Michx.) Pers. Fig. 3. — Conidiophores and spores of C. nepheloides Ell. and 

 Holw. on Mexican blue-bell (Eustoma russellianum (Hook.) Griesb.). 

 Fig. 4. — Conidiophores and spores of C. xanthicola Heald and Wolf on 

 Xanthium sp. Fig. 5. — Diagram of a portion of a cross section of leaf 

 showing abundance and distribution of conidial tufts of C. canescens Ell. 

 and Martin on the Lima bean (Phaseolus lunatus L.) X 73. Fig. 6. — 

 Conidiophores and spores of C. canescens Ell. and Martin on the Lima 

 bean (P lunatus L.). Fig. 7. — Spores of Cercospora oolleana (Thm.) 

 Speg. on the fig (Ficus carica L.). Fig. 8. — Conidiophores and spores 

 Cercospora fici Heald and Wolf on the fig (F. carica L.). 



Plate III. Species of Cercospora from A*arious hosts, No. 3. Fig. 1. — Conidio- 

 phores and spores of Cercospora adusta Heald and Wolf on California 

 privet (Ligustrum ovalifolium Hassk.). Fig. 2. — Conidiophores and spores 

 of C. prosopidis Heald and Wolf on mesquite (Prosopis glandulosa Torr.). 

 Fig. 3. — Conidiophores and spores of C. perniciosa Heald and Wolf on 

 buttonbush (Cephalanthus occidentalis L.). Fig. 4. — Conidiophores and 

 spores of C. chrysanthemi Heald and Wolf on Chrysanthemum sp. 

 Fig. 5. — Conidiophores and spores of C. pustula Cke. on Virginia' creeper 

 (Psedera quinquifolia (L.) Greene). Fig. 6. — Conidiophores and spores 

 of C. ooscura Heald and Wolf on globe artichoke (Cynara scolymus L.). 

 Fig. 7. — Conidiophores and spores of C. fulvella Heald and Wolf on crown- 

 beard (Verbesma tecoana Buckl.). Fig. 8. — Spores of C. viticola (Ces.) 

 Sacc. on Vitis sp. Fig. 9. — Conidiophores and spores of C. personata (B. 

 and C.) Ell. on the peanut (Arachis hypogaea L.). 



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