March 1905] Cultures of Uredineae in 1904. 
61 
ing specimen in his herbarium, unless one from Santa Cruz, 
Calif., collected by Dr. C. L. Anderson, November, 1875, could 
be the one intended. This specimen, however, is said to be 
upon Salix brachystachys. 
Although the type collection can not be accurately identi¬ 
fied or duplicated, there seems to be no reason to question the 
reference of the fungus described to the common willow rust 
growing throughout California and the other parts of North 
America. Dr. Farlow kindly sent me a part of his specimen 
on S. brachystachys , and also a specimen on N. Bigelozuii, col¬ 
lected in Washington by C. V. Piper in 1899, and they agree 
in all essential particulars with the eastern collections on willow. 
I have also had the privilege, through the kindness of Mr. 
Chas. H. Peck, of examining the type specimen of Lecythea 
macrosora Pk. (Bot. Gaz. 5:35. 1880), collected in Colorado 
by Brandegee, and thought to be on Epiliobium, and find that 
it is the uredostage of this same species of willow rust. An 
examination of type material of Melampsora paradoxa D. & H. 
shows no important deviation from the common form. The 
peculiar free teleutospores figured by Dr. Dietel (Hedw. Beibl. 
40:33. 1901) appear to be occasional reversional forms, due 
to disturbed nutrition or some such cause. Similar isolated 
teleutospores have been described by Klebahn in European ma¬ 
terial (Ztschr. f. Pf.-Kr. 9:98). The name, Melampsora mac¬ 
ulosa D. & H., is nomen nudum. It was applied to forms show¬ 
ing especially bright yellow discoloration of the leaf about the 
uredosori, but without other marked characters, as examination 
of type material shows. 
The species may be characterized as follows: 
Melampsora Bigelowii Thuem. 
0. Spermogonia amphigenous, scattered, or somewhat gregarious,, 
minute, punctiform, pale yellow, inconspicuous, subcuticular, conical, 60-80 
fi in diameter, 40-45 u high. 
I. Aecidia chiefly hypophyllous, scattered or somewhat gregarious,, 
small, .1-.2 mm. across, oblong, pale yellow fading to white, inconspicuous, 
formed between the epidermis and mesophyll, soon naked, pulverulent; 
aecidiospores globoid, 15-22 by 18-27 /*; wall colorless, 2-3 u thick, finely 
and evenly verrucose, with distinct papillae, pores scattered, noticeable. 
On Larix Lyallii Pari., Alberta, Can., and probably on other species 
of Larix in various parts of the United States and Canada. Cultivated 
on L. decidua Mill, and L. laricina (DuR.) Koch. 
II. Uredosori chiefly hypophyllous, usually on conspicuous yellow 
spots, scattered or gregarious, round, .3-.5 mm. across, orange-yellow 
fading to pale yellow, soon naked, somewhat pulverulent; uredospores 
globoid, 15—19 by 17-24 wall colorless, 2.5-3.5 ^ thick, sparsely and 
evenly verrucose, pores scattered, noticeable; paraphyses intermixed with 
the spores, capitate, smooth, 50-70 u long, heads 22-25 u broad, wall 
3-5 m thick, peripheral paraphyses thinner walled and more clavate. 
III. Teleutosori amphigenous, or sometimes partly or wholly epi- 
phyllous or hypophyllous, scattered, roundish or irregular, about .5 mm. 
across, often confluent, orange-yellow becoming yellowish or purplish 
