ARTHUR: NEW UREDINEAE 589 
On Petalostemon oligophyllus (Torr.) Rydb., Pecos, New Mex- 
ico, 1903, Z. D. A. Cockerell. Both the pycnia and telia of this 
| species are most abundant and conspicuous. It differs from Uro- 
| pyais Petalostemonis (Farl.) DeToni in the absence of uredinia and 
| paraphyses, and in other less evident characters. 
_ Aecidium Petalostemonis Kellerman & Carleton, sp. nov. 
__ O. Pycnia amphigenous, sparsely disposed in indefinite groups, 
_ inconspicuous, subepidermal, globoid, 70-100 # in diameter by 
_ 90-100 p» high; ostiolar filaments 30-45 y long. 
: I. Aecia amphigenous, gregarious, irregularly arranged in in- 
- definite groups, on discolored spots occupying all or part of a leaf, 
short, about 0.2 mm. across; peridium colorless, margin some- 
_what lacerate, spreading or somewhat recurved, peridial cells 
| thomboidal, overlapping, outer wall rather thick, 5—7 y, not con- 
 Spicuously striate, smooth, inner wall medium thin, 3-4 y, rather 
_ finely verrucose ; aeciospores broadly ellipsoid or globoid, 18-24 
X 20-28 y, wall colorless, rather thin, 1-1.5 4, evenly and rather 
- finely verrucose. 
On Petalostemon candidus (Willd.) Michx., Manhattan, Kansas, 
_ June, 1886, W. A. Kellerman (Ellis & Ev. N. Am. Fungi 7845), 
Lincoln, Nebraska, May 27, 1902, John L. Sheldon ; P. purpureus 
: (Vent.) Rydb. (2. violaceus Michx.), Manhattan, Kansas, June 6, 
_ 1887, Kellerman & Swingle, Stockton, Kansas, June 6, 1906, 
E. Bartholomew (Bartholomew, Fungi Colum. 2296); ?. seas 
_ Nutt., Merriman, Nebraska, July 11, 1899, /. 2. Bates. It is also 
: recorded on P. multiforus Nutt. from Kansas (Trans. Kansas 
- Acad. Sci. 10: gt. 1887), and on an undetermined species of 
_ Petalostemon, above Big Horn, Wyoming (Proc. Davenport Acad. 
Sci. 7: 252. 1889). This name was used by Kellerman and 
Carleton over twenty years ago in a “ Second list of Kansas para- 
- Sitic fungi, together with their host plants,” contributed to the tenth 
Volume of the Proceedings of the Kansas Academy of Science, but 
_ Without a description. The name was written “ Aecidium Petalos- 
_ monis Farl.,” and during the year following the type collection 
was issued in Ellis & Ev. N. Am. Fungi as “ /uccina Petaloste- 
| Monis Farl.” Since that time it has been variously ascribed to 
_ Farlow and to Kellerman & Carleton, or as “I” of Puccinia Petal- 
_ %Stemonis or Uropyxis Petalostemonts. Under the last name Sy a 
_inhis Monog. Uredinearum appends a partial description, ee wit a 
Cut using a distinctive name Or positively referring it to Uropyats. 
= s Bates eh 
aE Se aaa en ee 
