New species of Uredineae—XIII* 
JosEPH CHARLES ARTHUR 
The present paper in the author’s series of new species is 
made up partly of newly discovered species and partly of old species 
requiring a change of specific or generic names. There is also 
a substitution of two new generic names and one old one for un- 
tenable ones. When preparing the classification of the Uredinales, 
announced by the writer before the Vienna Botanical Congress 
in 1906, it was necessary to work with much imperfectly studied 
material. As the classification was based upon life histories, and 
as the life cycle of the majority of species was then unrecorded 
and largely unknown, a number of errors were made due to erron- | 
eous assumptions. These errors are being corrected as knowledge: 
of the rusts increases, and a number are taken in hand at this 
time. The genera to which attention is now directed are Lyso- 
spora, Telospora and Dasyspora, as they were given in the Vienna 
paper. 
Puccinia pacifica Blasdale, sp. nov. 
II. Uredinia amphigenous, more abundant beneath, thickly 
scattered, irregularly rounded, 0.3-1 mm. across, at first bullate, 
soon naked, somewhat pulverulent, dark chestnut-brown, rup- 
tured epidermis very conspicuous; urediniospores ellipsoid or 
obovate, 22-26 by 26-32 4; wall chestnut-brown, 2-3 u thick, 
finely echinulate, the pores 2, equatoria 
III. Telia similar to the uredinia but somewhat darker and 
less pulverulent; teliospores oblong or obovate-oblong, 20-24 by 
38-48 », rounded or obtuse above, obtuse or narrowed below, 
somewhat constricted at septum; wall chestnut-brown, lighter 
below, 1-1.5 « thick, thicker above, 3-7 », smooth; pedicel color- 
less, fragile, once or twice length of spore when unbroken, 7-9 u 
in diameter. 
On Plantago maritima L., Montara Point, San Mateo County, 
California, August 7, 1920, W. C. Blasdale 1108. A specimen of 
demamlnrone PRES the Botanical Department of Purdue University Agri- 
cultural Experiment Station. 
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