221 
stance the transition between Boletus and Polyporus is made. Out of 
the 110 described, 18 species and 2 varieties are recorded as edible; but 
of these the three we have marked by Roman type are regarded with 
suspicion. The edible species are as follows: 
Boletus elegans , Schum.; B. Clintonianus , Pk.; B. luteus , L.; B. grauu- 
latus, L.; B. Collinitus , Fr.; B. badius , Fr.; B. bovinus , L.; B. rubinellus , 
Pk.; B. miniato-olivaceus , Frost.; B. miniato olivaceus, var. sensibilis , Pk.; 
B. chrysenteron, Fr.; B. subtomentosus , L.; B. edulis , Bull.; B. aestivalis , 
B. impolitus , Fr.; B. versipellis, Fr. B. scaber , Fr.; B. castaneus , Bull.; 
Strobilomyces strobilaceus , Berk. 
Students will not find many Boleti , any more than any other kinds of 
fleshy fungi, during a dry season or during the dry part of any season. 
They are a moist, fleshy group of plants, and only thrive well where 
there is plenty of atmospheric humidity. Professor Peck’s experience 
has been that a few common species of Boleti may be found from June 
to October, hut that most of them occur only in July and August, the 
warmest part of the season, and that they are most abundant of all in 
very warm showery weather. 
It was a happy thought which induced the author to prepare this 
useful monograph; and let us hope that its publication will serve as a 
stimulus to Rocky Mountain and Pacific coast botanists in the study of 
the Boleti of this vast and too-much ueglected region. — F. W. Ander¬ 
son and F. D. Kelsey. 
Thaxter, Roland. A New American Phytophthora. Botanical Ga¬ 
zette, Vol. XIV, No, 11, p. 273. 
Dr. Thaxter’s note in the last Gazette will be of interest to all who 
know the peculiarities of this somewhat isolated genus. This new spe¬ 
cies of Phytophthora was found in the vicinity of Xew Haven, Conn., 
growing upon and destroying large quantities of lima beans. The 
pods, both young and old, seem to be best suited to the growth of the 
fungus, upon which it appears as a u clear white felted coating,” partly 
or entirely covering both sides of the pods. Like its near relative, it 
seems to be a rapid disorganizer, soon opening the way for numerous 
saprophytic forms. It differs from P. infestans, DBy., in its larger and 
proportionately broader conidia, and the distinct appearance and mode 
of branching of the conidiophores. In its large size it seems to resemble 
the P. cactorum of Europe, but Dr. Thaxter, although not able to ex¬ 
amine specimens of the latter, has decided that it differs specifically 
from the European species. He has accordingly named it Phytophthora 
phaseoli , n. s., and adds a concise description, which it may be well to 
repeat: 
Mycelial hyplim branched, rarely penetrating the cells of the host by irregular 
hanstoria. Conidiophores slightly swollen at their point of exit through the stomata, 
arising singly or one to several in a cluster ; simple or once dichotomously branched 
and once to several times successively inflated below their apices. Conidia oval or 
