Wilson: Studies in North American Peronosporales 193 
two genera we may characterize Kawakamia as Basidiophora with- 
out the apical clavate enlargement of the conidiophore which bears 
one instead of several conidia. 
Peronospora Borreriae Lagerh. ; Pat. & Lagerh. Bull. 
Soc. Myc. France 8: 123. 1892 
Like many of the other species of fungi which Professor Lager- 
heim collected in Ecuador the present one appears not to have been 
reported from additional localities. Nor is this the only point of 
interest in connection with this species, as it is neither a Peronos- 
pora in the strict sense of the word, nor does its host belong to the 
genus Borreria. Although the original description calls for dich- 
otomously branched condiophores the specimen in the Ellis collec- 
tion at the New York Botanical Garden shows only monopodially 
4-5-times branched condiophores with the pronouncedly conic and 
narrowly pointed ultimate branchlets which are so characteristic 
of that section of the genus Rhysotheca which contains the species 
R. Viburni, R. ribicola , and R. Gonolobi. 'Indeed it approaches 
the last named species quite closely in both size and habit. The 
conidia are also nearest to those of that species, but their ovoid 
outline readily distinguishes them from those of any of the other 
species just mentioned. The present species should stand next to 
R. Gonolobi. An examination of the host shows it to be Mitro- 
earpus hirsutus (L.) DC., a species common throughout tropical 
America. We may, therefore, look for future collections of this 
fungus from other localities. The species should be known as 
Rhysotheca Borreriae (Lagerh.) G. W. Wilson. 
Rhysotheca Heliocarpa (Lagerh.) G. W. Wilson 
Bull. Torrey Club 34: 402. 1907 
This species was described by Lagerheim from Ecuador on 
Heliocarpns. So far as the present writer has been able to learn 
it has not been reported in any subsequent paper. It was with 
considerable pleasure and surprise that a packet of material from 
Cuba from the collections in 1903 by the late Professor L. M. 
Underwood and Professor Earle was examined and found to be 
.this species. The material was collected at the base of El Yunque 
