1894.] Papers Read Before Section G, A. A. A. S. 375 
were seen which showed the transition stages. On August 
8th and 9th the plants were gathered and every conceivable 
gradation between the fertile and sterile leaves was present, 
as illustrated in over thirty specimens. Some leaves of the 
fertile kind were expanded to a size equal to that of large 
sterile leaves, but usually the venation was coarser and a few 
rudimentary indusia could usually be found on the basal pin- 
nules of the lower pinnze. Some leaves were found which it 
was impossible to properly correlate. The number and per- 
fection of the sporangia as well as the indusia varied in ac- 
cordance with the variation of the leaves. On those leaves 
or parts of leaves where but few or rudimentary sporangia 
were developed, there were frequently cases of apospory, 
rudimentary prothallia being developed from the placental re- 
gion. 
Ruspy, H. H.: Lophopappus, a new genus of mutisiaceous 
Composite, and Fluckigeria, a new genus of Gesneriace@.— 
The author gave the general characters of the groups to which 
the new genera belong, their positions in such groups, the 
occurrence of the plants on which the new genera are based, 
and the description of the latter. 
ATKINSON, GEO. F: Preliminary note on the swarm spores 
of Pythium and Ceratiomyxa.—Recent study of the ‘‘damp- 
ing off” fungus from fern prothallia and green house cuttings 
of dicotyledons has served to show that considerable confusion 
exists concerning our knowledge of the swarm spores of the 
genus Pythium, or that the genus is a very heterogeneous one. 
In DeBary’s? earlier work he says that P. proliferum possesses 
eval uniciliate zoospores, and that occasionally double zoo- 
d arm spores with twolateral cilia. Schroeter* characterises 
lias: 
Syters Saprolegnieen, Prings. Jahrb. f. wiss. Bot. 2: 185. 1860. 
nd. ee Pa Rie 
. - 2. Morph. u. Phys d. Pilze 4: 93. 1881. 
Engler u. Prantl’s Natiirlich. Pflanzenfam. 1: —. —- 
