DESCRIPTION OF PLATES. 59 



fungus grown in a pure culture. Fig 7. Asci from the same; a, cylindrical 

 form, with overlapping uniseriate spores; b, shorter subclavate form; c, 

 ascus from older culture, showing shorter stipe. Fig. 8. Fresh, mature 

 ascospores from the same. Fig. 0. Asci and fugaceous paraphyses from 

 culture of Glonierella rufotnaculans vaccimi. Fig. 10. Portion of an 

 acervulus of Gloeosporium mi mix, from a pure culture from a diseased New 

 Jersey berry. Fig. 11. Cornelia from the same. Fig. 12. A portion of a 

 cranberry leaf, showing the slightly elevated epidermis and the protruding 

 neck of Acantliorhynclius vaccinii. Fig. 13. A single perithecium of the 

 same fungus, taken from a pure culture on corn meal, showing portions of 

 the hyphse which form the thin, loose mycelial layer w r ith which the perithecia 

 are overgrown in artificial cultures. Fig. 14. Asci and paraphyses from 

 the same pure culture ; a, a young ascus, in which the mature ascospores 

 are surrounded by granular gelatinous matter ; ft, a slightly older stage ; c, 

 a nearly mature ascus, in which the granular protoplasm is shrunken about 

 the spores and attached to the apex of the ascus. A portion of it remains 

 as a thin gelatinous envelope about the spores after they are expelled from 

 the ascus. Fig. 15. Two aseospores of the same. Fig. 16. A germinating 

 ascospore, bearing the peculiar appressorium. Fig. 17. An appressorium 

 viewed from above. Fig. 18. A group of appressoria attached to the sur- 

 face of a cranberry leaf. Fig. 19. A germinating appressorium grown in a 

 poured plate. Fig. 20. A germinating appressorium from the midrib of a 

 leaf, showing superficial branching hypha?. Fig. 21. A section of a germi- 

 nating appressorium on a leaf ; a, a germ tube w r hich has entered the leaf 

 through a stoma. Fig. 22. Another germinating appressorium ; a, the germ 

 tube entering the leaf through a stoma. 



PLATE IV. Fig. 1. Ycnturia compacta. Massachusetts specimens on the under 

 surface of a leaf showing various aggregations of perithecia. (Natural 

 size.) Fig. 2. Group of perithecia magnified 24 diameters. Fig. 3. Single 

 perithecium, showing spines distributed over the upper half. Fig. 4. Two 

 asci, showing variability in shape and length. Fig. 5. A perithecium of 

 the same fungus from a Wisconsin specimen, showing fewer spines ar- 

 ranged about the apex. Fig. 6. Three asci from the same, showing varia- 

 tions in shape and arrangement of the spores. Fig. 7. A single ascospore 

 from the same. Fig. 8. A perithecium of Anthostomella destruens from a 

 pure culture of the fungus. Fig. 9. An ascus from the same. Fig. 10. 

 Two ascospores of the same. Fig. 11. A germinating ascospore of Antho- 

 stomella destruens. Fig. 12. Pycnidia of Scptoria longispora on under sur- 

 face of a cranberry leaf. Fig. 13. Section of a pycnidiuni of Septoria 

 longispora on a cranberry leaf. Fig. 14. Three spores of Septoria longi- 

 spora from a cranberry leaf. Fig. 15. Synchytrium vaccinii on pedicel, 

 bracts, and flower of a cranberry. (Natural size.) Fig. 1C. Synchytrium 

 vaccinii. A single gall enlarged. Fig. 17. Synchytrium vaccinii. A sec- 

 tion through a gall showing the hypertrophied tissue .and the sporocarp. 

 Fig. 18. Arachniotus trachyspermus on a decayed and shriveled cranberry. 

 Fig. 19. Arachniotus trachyspermus on the side of a culture flask. Fig. 

 20. Ascogenous hypha? and asci of the same from a pure culture. Fig. 21. 

 A single ascus of the same from a pure culture. Fig. 22. A single asco- 

 spore of the same. Fig. 23. Rclerotinia oxycocci Wor? Branching chain 

 of conidia, inverted ; a, a single conidium. Fig. 24. Cladosporium oxy- 

 cocci. Conidiophores bearing conidia from a cranberry leaf; a, a single 

 septate conidium from the same. 



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