49 
before. So far as I am aware no Ustilaginere have been observed on 
Malvaceae, and on this account I think a short description of Doassan- 
sia gossypii will not be without interest. 
The fruiting bodies form minute black points in the leaf substance. 
They appear to originate in the same way as Fiscli* has described for D. 
sagittarice , (West) Fisch. The ripe spores are oval, elongated, or 
pointed, 21-30// long, 12-15// broad, often somewhat angular and are 
firmly bound together. Their membrane is somewhat thick and of a 
slightly yellowish color, often rather strongly thickened at the corners of 
the spore. The outer cells are somewhat smaller than the spores, with¬ 
out contents, and with a brown membrane. This species has larger 
spores than any species of Doassausia known up to this time. Below 
is a description of the fungus : 
Doassansia gossypii, ft. s. —D. soris rotundatis punctiformibus, 
minimis, sparsis, atris sporis arete coujuuctis, ovalibus vel oblongis, 
21-30/a Ion gis, 12-15/a latis, episporio levi, dilute luteolo, tegumento com- 
muni e cellulis minoribus, membrana fusca, levi coustituto. 
Hab. in foliis Gossypii, spec, ad Balsapamba. Prov. de los Rios, 
iEquatorise. 
A NEW PERONOSPORA ON GONOLOBUS FROM SOUTH CAROLINA. 
While examining a Leptopuccinia collected on an Asclepiad at Quito, 
and comparing it with Puccinia gonolobi , Rav., I found a new Perouo- 
spora in considerable quantity on the specimens bearing this fungus (S. 
C. Mellichamp, Herb. Farlow). 
The fungus forms large angular spots bounded by the nerves on the 
lower surface of the leaves. On the upper side they appear yellowish. 
The conidiophores are very slightly swollen at the base, several times 
dichotomously branched, with straight branches pointing obliquely 
upward. The lower part is 8.5-11/a in diameter. Its membrane is thin 
and colorless. The end branches are straight and conical, G-9/a long. 
The conidia are roundish, ovate, with a pointed end and light violet gray 
membrane; their length measures 18-24/a and their breadth 16-21/a. 1 
have not found oospores. The characteristics of the species are as 
follows: 
Peronospora gonolobi, ft. s. —P. conidiophoris arborum modo 
repetite dichotomis ramulis rectis, membrana achroa, ad basim parum 
. inflatis 8.5-11/a latis; ramulis terminalibus rectis 6-9//Iongis; conidiis 
globoso-ovatis membrana pallide griseola 18-24/a longis, 16-21 latis; 
oosporis ignotis. 
Hab. in foliis Gonolobi in South Carolina, U. S. parasitica. 
Quito, Ecuador. 
* C. Fiscli, Entwickelungsgescliiclite yon Doassansia sagittarice (Ber. d. Deutsch. 
Botan. Ges. Bd. n, 1884.) 
4289—No. 1-4 
