446 
J. C. ARTHUR 
100. Uromyces BiDENTicoLA (P. Henn.) Arth. (on Carduaceae) . 
Bidens heterophylla Ort., Quezaltenango, Jan. i8, 1917, II, 747. 
Bidens Holwayi Sherff & Blake, Quezaltenango, Jan. 31, 19 17, o, 
III, II2, iii, 816. 
Bidens pilosa L., San Rafael, Dept. Guatemala, Jan. 7, 1915, II, 27. 
Bidens squarrosa H.B.K. (B. tereticaulis DC), Guatemala City, 
Dec. 31, 1914, II, III, 4\ Solola, 7000 feet alt., Jan. 25, 1915, 
II, III, i/o; Zunil, Dept. Quezaltenango, Jan. 28, 1917, o, II, 
786. 
A long-cycle rust, having pycnia, uredinia, and telia, common in 
the American tropics, especially in the uredinial stage. It has gener- 
ally been listed as U. Bidentis Lagerh., a name that properly belongs to 
the similar short-cycle form. The rust in the uredinial stage was 
collected at Amatitlan, on B. pilosa, date not given, by Heyde and Lux, 
and on B. leucantha Willd., in January, 1876, place not given, by 
Bernoulli and Carlo. 
101. Uromyces Montanoae Arth. & Holw. (on Carduaceae). 
Montanoa hibiscifolia Benth., San Felipe, Dept. Retalhuleu, Jan. 
13, 1917, II, 705. 
Montanoa Pittieri Rob. Sc Greenm., Antigua, 5300 feet alt.. Dept. 
Sacatepequez, Jan. 12, 1915, II, 77; San Lucas Tollman, 5100 
feet alt.. Dept. Solola, Feb. 2, 1915, II, III, 176] Moran, Dept. 
Amatitlan, Dec. 22, II, III, 625. 
A rust similar to Uromyces bidenticola, but distinguishable in the 
urediniospores. As in that species, some of the telia show early germi- 
nation in evident association with the uredinia. The genus Montanoa 
is somewhat but not closely related to Bidens. 
Purdue University, 
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