366 KUNKEL: PROMYCELIUM OF CAEOMA NITENS 
5.. The production of a promycelium by these aecidiospores 
suggests that Caeoma nitens is a short-cycled rust and casts doubt 
on the connection supposed to exist between this fungus and 
Puccinia Peckiana. 
6. Caeoma nitens is the only rust of the caeoma type, having 
aecidiospores that are known to produce a promycelium. The 
other rusts having aecidiospores that are known to function as 
teleutospores, belong to the one genus Endophyllum. 
I am greatly indebted to Dr. R. A. Harper and Dr. W. G. 
Marquette for advice and criticism while engaged in this work. 
COLUMBIA UNIVERSITY, NEw York CIty. 
BIBLIOGRAPHY 
1. Clinton, G. P. Orange rust of raspberry and blackberry. III. Agr. 
Exp. Sta. Bull. 29: 273-300. 1893. 
2. Clinton, G. P. Relationship of Caeoma nitens and Puccinia 
Peckiana. Bot. Gaz. 20: 116. 1895. 
3. Hoffmann, A. W. H. Zur Entwicklungsgeschichte von Endo- 
phyllum Sempervivi. Centralbl. Bak. 2 Abt. 32: 137-158. 1912. 
4. Kurssanow, L. Zur Sexualitat der Rostpilze. Zeits. Bot.2: 81-93- 
TQIO. 
5. Maire, R. L’évolution nucléaire chez les Endophyllum. Jour. de 
Bot. 14: 369-382. 1900. 
6. Newcombe, F. C. & Galloway, B. T. Perennial mycelium mt the 
fungus of the blackberry rust. Jour. Mycol. 6: 106-107. 1890. 
7. Olive, E. W. Sexual cell fusion and vegetative nuclear divisions 
in the rusts. Ann. Bot. 22: 331-360. 1908. 
8. Sappin-Trouffy, P. Recherches histologiques sur la famille des 
Urédinées. Le Botaniste 5: 59-244. 1896. 
9. Tranzschel,W. Culturversuche mit Caeoma interstitiale Schlechtd. 
(= C. nitens Schw.). Hedwigia 32: 257-259. 1893. 
Tulasne, L. R. Second mémoire sur les Urédinées et les Ustilaginées. 
Ann. Sci. Nat. IV. 2: 77. 1854. 
m4 
9 
