CYLINDROSPORIUM ON STONE FRUITS 
28. Sturgis, W. C. On the carpological structure and development of the Colle- 
maceae and allied groups. Proc. Amer, Acad. Arts and Sci. 25: 15-52, pis. 
1-8. 1890. 
29. Vines, S. H. Tryptophane in proteolysis. Ann. Bot. 16: 1-22. 1902. 
30. Wehmer, C. Pflanzenstoff. (Phanerogamen). 191 1. 
DESCRIPTION OF PLATES XIII-XIV 
Plate XIII 
Fig. I. Photograph of leaf of Prunus avium with ascocarps, magnified about 
2 diameters. 
Fig. 2. Photograph of a portion of same leaf showing ascocarps opening by 
stellate slits, magnified about 6 diameters. 
In the following three plates the figures are from camera lucida drawings and 
the magnification is indicated after each figure. 
Plate XIV 
Fig. 3. Section of leaf of Prunus avium showing the subepidermal acervulus 
bearing microconidia (spermatia ?) while still covered with macroconidia of Cylin- 
drosporium. X 250. 
Fig. 4. Pycnidium of Septoria pruni Ellis in leaf of Prunus americana, from 
"North American Fungi" II, 1151. X 1,300. 
Fig. 5. Section of leaf of Prunus serotina showing subepidermal conidia bearing 
acervulus of Septoria cerasina Peck ( = Cylindrosporium), from type material. 
X 250. 
Fig. 6. Ascocarp of Coccomyces hiemalis in leaf of Prunus avium, showing 
remains of epidermal cells above and below and lignified cells of host vascular bundle 
near center of ascocarp. X 250. 
Fig. 7. Ascocarp of Coccomyces prunophorae. X 250. 
Fig. 8. Young ascocarp of Coccomyces hiemalis in leaf of Prunus avium 
showing portions of three ascogonial (?) coils and two trichogynes. The pseudo- 
parencyhmatous covering of the ascocarp is beginning to form and conidiophores 
(microconidiophores) are beginning to disintegrate above the center of the young 
fruit body. X 250. 
Fig. 9. Coiled ascogonial (?) branch from a slightly later stage in which the 
trichogyne is disintegrating. 
Fig. 10. Young asci and portions of ascogenous hyphae from a section of 
developing ascocarp of Coccomyces hiemalis. 
Fig. II. Old ascocarp of Coccomyces hiemalis producing "apothecial conidia." 
X 250. 
Plate XV 
Fig. 12. Section of leaf of Prunus virginiana showing entrance of germ tube 
of Cylindrosporium spore through a stoma and subsequent growth of mycelium. 
From artificial infection under bell jar four days after inoculation. X 450. 
Fig. 13. Early stage in the development of stroma and acervulus of Cylindro- 
sporium beneath the upper epidermis of same host, five days after inoculation. Two 
haustoria have entered an epidermal cell. X 450. 
