ARTHUR AND JOHNSTON: UREDINALES OF CUBA 115 
10-13 by 48-61 и, usually obtuse at both ends; wall pale cinnamon- 
brown, thin, about ти, smoo 
A distinctive species, appearing in abundance over the large 
leaves of the host. The form of the uredinial envelope is especially 
interesting, free paraphyses being a novelty in the genus. 
A uredinial specimen on the same host was collected by Lager- 
heim near Quito, Ecuador, June, 1890, which was given a her- 
barium name by the collector not established by description or 
publication. 
It is doubtful if this is a heteroecious rust, like the members 
of the genus occurring in northern regions. Information to com- 
plete the life history will be of special interest. 
The species is named in recognition of the botanical services of 
Mr. Percy Wilson of the N. Y. Botanical Garden in making known 
the flora of Cuba, and especially the rust flora. Mr. Wilson's 
numerous collections of Cuban rusts, made largely in 1916, added 
much to previous knowledge, and his patient and critical examina- 
tion of the hosts for most of the collections in this list has added 
immensely to the accuracy and value of their citation. 
I4. Cionothrix Cupaniae sp. nov. 
ON SAPINDACEAE: 
Cupania americana L., Ceballos (Prov. Camagüey), 
March 24, 1916, Johnston 668. 
Cupania glabra Sw., Paso Estancia (Prov. Oriente), May 3, 
I916, Johnston 679, 694 (type), 696. 
Telial columns hypophyllous, in groups on discolored and some- 
what thickened areas, 3-5 mm. across, a mammiform swelling 
forming the base from which each column arises, cylindrical, 
short, rigid, 0.3-0.5 mm. long, 19-354 wide, colorless; teliospores 
fusiform, 7-15 by D tapering at both FUN wall colorless, 
thin, ти or less, colorless 
No indication of жы. were found on the type, ло. 694, 
or other collections, and for this reason the species is issued under 
the short-cycle genus, Cionothrix, even though pycnia were not 
seen. Sections of young telia show the young catenulate spores 
arising in a layer, like cylindrical hyphae with transverse septa, 
and with no indication of peridium or paraphyses. | 
