194 
Erysiphe liriodendri, Schw., is fully described for the first 
time. All mycologists will doubtless be pleased to find the trouble- 
some Lrysiphe Marti referred, for reasons stated, to &. com- 
munis. .cichoraceorum DC. (=E£. lamprocarpa), is recorded as 
occurring on twenty-nine hosts. 
Uncinula spiralis, B. & C., is referred to U. ampelopsidis, 
Pk. The former name has priority to the latter and should have 
been adopted. It was first published with a figure in Berkeley’s 
Cryptogamic Botany. Uncinula circinata, C. & P., which usually 
grows on Acer rubrum, is here given only on A. saccharinum. 
This and Microsphera semitosta were collected only by Mr. M 
B. Waite, who is now a botanist of the State Laboratory. Un- 
cinula salicis (DC.) Wint., includes the forms on both Salix 
dnd Populus. & 
Under Podosphera oxyacanthe (DC.) De By., are included 
the forms recognized in Europe under that name, P. ¢ridactyla 
and P. myrtillina. The American specimens show intermediate 
forms uniting them all. 
Microsphera alni (DC.) Wint., includes a number of forms 
that have stood as species until now, though always troublesome, 
and recognized by little besides the host. They are: M. pul- 
chra, platani, Van Bruntiana, viburni, Hedwigii and Friesii, in 
addition to W. penicillata. Microsphera quercina (Schw.), Bur- 
rill, receives the forms on oaks ahha known as MV. extensa and 
M. abbreviata. 
The names mentioned above are the principal ones reduced 
to synonyms, and the number of species is thus diminished by 
twelve. Botanists have long felt the need of such a step, and 
the abundant material and years of study have enabled the 
authors to do it well. ALES: 
Flora Ottawaensis—Additions to the. (Ottawa Nat., i.. p. 77-) 
Two indigenous species and four colonists are reported, ad- 
ditional to previous lists. - 
Germination, of Cucurbitaceous Plants.—Byton D. Halsted. 
(Agric. Science, i., pp. 149-154.) 
Gymnogramme triangularis, Kaulf. (Garden, xxxii., p. 44; il- 
lustrated.) 
Halesia tetraptera, L. (Garden, xxxi., p. 520; illustrated.) 
