32 ARTHUR: NEW SPECIES OF UREDINEAE 
this interesting new rust was sent to the writer immediately upon 
its discovery, with the name and permission to publish. It was 
found in considerable abundance on a bluff overlooking the Pacific 
Ocean. 
Puccinia irrequisita Jackson, sp. nov. 
II. Uredinia amphigenous, scattered, round, 0.3-0.5 mm. 
across, early naked, pulverulent, cinnamon-brown, ruptured epi- 
dermis conspicuous; urediniospores globoid or broadly ellipsoid, 
20-23 by 23-26 w; wall cinnamon-brown, 1-1.5 » thick, moder- 
ately and finely echinulate, the pores three, equatorial. 
III. Telia amphigenous, chiefly epiphyllous, scattered, round, 
0.3-0.5 mm. across, tardily naked, pulvinate, blackish brown, or 
grayish from the overlying epidermis; teliospores irregularly ellip- 
soid, somewhat angular, 24-29 by 34-40, rounded or obtuse _ 
above, rounded or truncate below, scarcely constricted at septum; 
wall chestnut-brown, 3-3.5 u thick, not appreciably thickened 
above, obscurely and very finely verrucose; pedicel colar 
short, deciduous. 
On Centaurea americana Nutt., Austin, Texas, April 6, 1901) 
Il (Ellis & Ev. Fungi Columb. 1642); same, June 5, 1901, II, III 
(type) (Barth. N. Am. Ured. 1338). Both collections were made 
by W. H. Long. This species is similar to Puccinia Centaureae 
Mart., with which it has been listed. It differs from that species 
in the more irregular teliospores with their considerably thicker 
walls, and in the tardily naked telial sori. These differences, 
taken together with the fact that the host is not an introduced 
one but native, makes it seem best to consider the species strictly 
American. The particular study of it has been made by Professor 
H. S. Jackson, who has supplied the diagnosis. 
Puccinia additicia Jackson & Holway, nom. nov. 
Puccinia Coreopsidis Jackson & Holway; Arth. Am. Jour. Bot. 
5: 536. 1918. 
My attention has been called by Professor H. S. Jackson to the 
publication of Puccinia Coreopsidis Wakefield, from tropical Africa, 
in the Kew Bulletin for 1918, page 209. The part in which this 
name, with description and illustration, appears was issued in 
August, 1918, thus antedating the publication of the Guatemalan 
name by four months. The two rusts are entirely distinct, thus 
