1915| CURRENT LITERATURE 417 
The forms investigated are Puccinia Podophylli, P. suaveolens, and Uromyces 
Glycyrrhizae. Early in spring Puccinia Podophylli usually produces teleuto- 
spores on the bud sheaths at the base of the stems of the host plant (Podophyi- 
lum peltatum). These teleutospores are produced before any other spore 
forms and also before the plants are fully developed. Sometimes, according 
to OLIVE, traces of aecidia also, but no spermagonia, are found on the bud 
sheaths. Later, spermagonia and aecidia develop abundantly on the leaves. 
These aecidia have been shown by SHARP’ to arise from a binucleate mycelium. 
Teleutospores are produced on the leaves in late summer. OLIVE finds that 
the teleutospores on the bud sheaths and the aecidia, both here and on the 
leaves, arise from a perennial sporophytic (binucleate) mycelium which extends 
throughout the plant. Intermingled with the sporophytic mycelium is a 
perennial gametophytic (uninucleate) mycelium which gives rise to spermagonia 
and to incepts of aecidia which, however, are soon invaded by the sporophytic 
mycelium whose hyphae give rise to basal cells and rows of binucleate aecidio- 
spores. The mycelia of these two generations are generally commingled 
throughout the plant, but in the young parts the gametophytic mycelium 
is somewhat in advance of the sporophytic. Besides these perennial forms, 
local binucleate mycelia, originating from aecidiospores and giving rise to 
teleutospores, occur on the leaves. In Puccinia suaveolens on the Canada 
thistle and in Uromyces Glycyrrhizae on Glycyrrhiza lepidota three conditions 
of mycelial distribution have been observed by the author: first, perennial 
gametophytic mycelium giving rise to spermagonia and perennial sporophytic 
mycelium giving rise to secondary uredospores and to teleutospores are com- 
mingled throughout the same plant; second, perennial sporophytic myce- 
lium giving rise to secondary uredospores and to teleutospores occurs alone; 
third, annual local mycelium occurs which also produces uredospores and 
teleutospores, but the sori in which these are produced ar: rarely confluent 
like those of the perennial mycelium. Perennial — mycelium 
alone or local colonies of gametophytic mycelium have not observed. 
In all these cases no spore forms resulting from sy ate cell fusions 
have been found. The aecidiospores of Puccinia Podophylli and the uredo- 
spores of P. suaveolens and Uromyces Glycyrrhizae are all regarded as secondary 
in nature. They arise apogamously, solely from sporophytic mycelia. The 
author has not observed aecidiospores nor primary uredospores arising as 
the result of fusions between gametes in these forms. 
Dawson? has studied the distribution of the mycelium of Puccinia fusca 
and Aecidium leucospermum in the rhizomes, buds, and leaves of A 
nemorosa. The mycelium of these fungi is found in the rhizomes and buds of the 
7 SHarp, L. W., Nuclear phenomena in Puccinia Podophylli. Bort. GAz. 51:463- 
464. IgiI. 
§ Dawson, W. J., Uber das Mycel des ait leucospermum und der Puccinia 
fusca. Zitache. Pflanzenkrank. 23:129~-137. 
