170 



Mycologia 



rust is the plumbeous appearance of the teha which are found on 

 the leaves and stems. When the telia rupture, powdery, choco- 

 late colored spores appear which upon microscopic examination 

 are found to be finely but conspicuously verrucose. This surface 

 marking of the teliospores is most pronounced upon the host 

 genera Microsteris (Collomia) and Phlox and less evident upon 

 the host genera Leptodactylon and Linanthus, although on the 

 latter genera the verrucose markings are easily seen when the 

 spores are examined dry under the higher objectives of the micro- 

 scope. Teliospores from the type material measure 19^25 by 

 3 1-40 /X with the apex 5-7 /x thick and the pedicel fragile, color- 

 less and fugaceous. 



Both hosts mentioned by Peck in the original description are 

 correct, but there is a discrepancy in the dates. The type ma- 

 terial on Microsteris (CoUomia) in the Peck collection bears the 

 date May 5, 1880, and the "co-type" on Phlox bears the date 

 June 6, 1880. There is no collection by Jones on Collomia in the 

 Peck herbarium bearing the August date. We must therefore 

 conclude that the dates in the original description should have 

 been May and June. 



Puccinia Wilcoxiana Thiim. Myc. Univ. 20^2. 1881 



The original description of this rust is in Latin printed upon 

 the exsiccatum label. The type was stated to be on some unde- 

 termined species of Gilia collected at Boise City, Idaho Territory, 

 April, 1881, by J. E. Wilcox. 



A small portion of the type material has been examined and 

 appears identical with Puccinia plumbaria as that fungus ap- 

 pears on Microsteris. While the host material is rather scanty it 

 has been possible to determine the host as Microsteris humilis 

 Greene an annual plant clearly distinct from Gilia Nuttallii A. 

 Gray which is perennial. 



The question of priority of name arises with respect to this 

 and the preceding species. In the New York Botanical Garden 

 Herbarium there is a letter from Dr. W. G. Farlow to Mr. J. B. 

 Ellis with regard to this matter. Dr. Farlow is of the opinion 

 that Century XXI of Thiimen's Mycotheca Universalis was not 

 issued until after June and that Peck's name has precedence. 



