ARUM MACULATUM AND ITS CROSS-FERTILIZATION. 235 
at the extremity, where four or five short branches form a little 
bel. The tips of these branches produce spores by division, as 
in Penicillium 
a structure will not, I think, come under any of the 
existing genora 0 of Hyphomycetes ; hence I venture to propose a new 
one as follows 
ios ra, nov. gen.—Flocci erect, bearing a oo head 
from which depend delicate hyphe clustered with spor 
A. Sapucaye. ing a dense velvety Slacker felt ; 
central columella areolate; basidial cells elongated and densely 
acked, forming a thick out at. Sporiferous threads septate, 
spores; spores clustered on threads as well, resembling hanks of 
onions, globose, ‘0002 inch; purple-brown. On decaying Bisthiie 
nut, Jan., 1282, 
ARUM MACULATUM AND ITS CROSS-FERTILIZATION. 
By Rosert Miter Curisty anp Henry Corper. 
Most of the following observations have been made by both of 
us in common, but our respective names are attached to any Sgr 
one which seemed to require it. e are aware that many of o 
observations are not new, although we believe that some of rhs 
are so. In any case so few persons seem to be aware of the inte- 
resting peculiarities connected with this plant that we make no 
excuse for sittin ing them in de 
ayin ing the summer a large stock of nutritious matter 
in its great hare corm, the Arum forms undergroun g 
the autumn its next year’s leaves"and spathe, and is thus ready to 
appear above ground as soon as the frosts of winter have taken 
even earlier.* These leaves have a very rapid growth, and the 
three or four which each plant bears ak their full size about the 
beginning or middle of April, according to the season. The petio. rs 
are whitish, with a delicate = of pink at the bottom, and ar 
enclosed in a sheath of four parts, which are in pairs, opposed to 
hus we found woes f ng Sond above ground on the 26th of December, 
18s, ve Chelmsford, and at Saffron Walden on the Ist of January following ; 
18th of the same month in the followin ng year, after a hard and late winter, some 
at Bardfield were eg about two inches high, snack others at Walden on the 
28th were six inc 
