116 MISSOURI BOTANICAL GARDEN. 
UREDINEAE. 
(MR. M. A. CARLETON, ) 
Uromyces Evrnorsiar Cooke & Peck, Rep. State Bot. 
N. Y. 28: 90. 1878. 
On leaves of Huphorbia heterophylla L. Fortune Is- 
land. Nov. 1890. 
Only uredospores present in these specimens. 
Pucorra Latertres Berk. & Rav. GrevilleaS: 52. 1874. 
On leaves of Ruellia clandestina L. Streets of Kings- 
ton. Dec. 9, 1890. 
Pucornta Giupertit Spegazz. Ann. Soc. Cient. Argent. 
10: 8. 1880, 
On leaves of Hyptis suaveolens (L.) Poit. Constant 
Springs, Jamaica. Dec. 10, 1890. 
Only uredospores present in this collection. 
Pucomn1a EmacuLata Schwein. Trans. Amer. Phil. Soc. 
4:295. 1831. 
On leaves of Panicum brevifolium L. Port Antonio, 
Jamaica. Dec. 1890. 
Pucornta HETEROSPORA Berk. & Curt. Journ. Linn. Soc. 
10: 356. 1869. 
On leaves of Abutilon crispwm (L.) Don. Fortune Isl. 
1890. 
Mesospores greatly predominate. 
Pucornta ARECHAVALETAE Spegazz. Ann. Soc. Cient. Ar- 
gent. 11: 22. 1881. 
On leaves of Cardiospermum Halicacabum L. Lucea, 
Jamaica. Jan. 1891. 
The author says, concerning this species, in the description above 
cited: ‘Species sporis valde ludentibus, et inter Uromycetem et Puc- 
cintiam nutans, ac vere inter duo genera intermedia.” The specimens 
of this collection show a great majority of mesospores ( ?). Butitisa 
question whether these should really be called mesospores, and whether 
the species may not be a Uromyces rather than a Puccinia, At times 
the same question would seem to apply almost equally as well, also, 
to the above species, P. heterospora. It is simply another instance 
among many, showing the uncertainty of purely morphological charac- 
ters, alone, as a basis of classification. 
