10 
Journal of Mycology 
[Vol. 9 
Experiment 23 demonstrated the correctness of the identifi¬ 
cation of the Rust (Puccinia caricis [Schum.] Reb.) on Carex 
riparia, whose alternate form is Aecidium urticae Schum. 
PUCCINIA CARICIS (SCHUM.) REB. FROM CAREX STRICTA. 
Exp. 24. May 2. Teleutospores sown on Urtica gracilis. 
— Abundant aecidia May 15. 
Exp. 25. May 2. Teleutospores sown on Impatiens biflora. 
— No infection. 
The above experimentally verifies the identification of the 
common Rust on Carex stricta, its aecidial form being Aecidium 
urticae Schum. 
PUCCINIA ANDROPOGONIS SCPIW. FROM ANDROPOGON SCOPARIUS. 
Exp. 11. April 26. Teleutospores sown on Pentstemon hirsutus. 
— Spermogonia May 10. (Host killed by Damp¬ 
ing-off.) 
The material for making the inoculation was kindly furn¬ 
ished by Dr. J. C. Arthur, Lafayette, Indiana. The result is 
a corroboration of work previously done by him. 
PUCCINIA WINDSORI.E SCPIW. FROM TRICUSPIS SESLERIOIDES. 
Exp. 36. May 11. Teleutospores sown on Impatiens biflora 
— No infection. 
Exp. 39. May 11. Teleutospores sown on Lycopus sinuatus. 
— No infection. 
Exp. 40. May 11. Teleutospores sown on Pentstemon pubescens. 
— No infection. 
Exp. 41. May 11. Teleutospores sown on Ptelea trifoliata. 
— Abundant spermogonia May 19; aecidia May 25. 
Exp. 42. May 11. Teleutospores sown on Ptelea trifoliata. 
— Spermogonia May 18; aecidia May 25. 
Exp. 43. May 11. Teleutospores sown on Ptelea trifoliata. 
— Spermogonia May 18; aecidia May 25. 
Thanks are extended to Dr. J. C. Arthur for the culture 
material and for the host plants used in Experiments 42 and 43. 
The results obtained when the teleutospores were sown on Ptelea 
trifoliata corroborate the work by the same experimenter. The 
aecidia obtained were not only excessively abundant but spore- 
formation continued vigorously for about three weeks. 
AECIDIUM OSMORRHIZ^E PECK FROM WASHINGTONIA CLAYTONI 
(OSMORRHIZA BREVISTYLIS.) 
Exp. 9. April 26. Aecidiospores sown on Chaerophyllum procumbens. 
— Teleutospores May 17. 
Exp. 10. April 26. Aecidiospores sown on Chaerophyllum procumbens. 
— No infection. 
Exp. 13. April 27. Aecidiospores sown on Chaerophyllum procumbens, 
out doors. 
— No infection. 
Exp. 28. May 5. Aecidiospores sown on Washingtonia claytoni. 
— No infection. 
