Arthur: Culti res oi Uredineae in 1969*^^ 233 



1. I'ici inia on Andropogon Ilallii Hack., collected at Red 

 Cloud, Neb., by Rev. J. M. Bates, was sown June 3 on thirteen 

 species of hosts with no infection, as follows: Carduus undulatus, 

 Ambrosia trifida, Lithospermum canescens, My osotis palustris, Hy- 

 dro phy Hum virginicum, Lepargyraea canadensis, Symphoricarpos 

 parviflorum, X a para dioica, Boehmeria cylindrica, Thai id nun 

 dioicum, Delphinium scaposum, Cassia Chamaecrista and Peta- 

 losiemon purpureas. The same material was sown the day fol- 

 lowing on four other species with no infection, viz., Amor p ha 

 nana. IJaptisia tiuctoria, Psoralen Ouobrychis and Xantlioxylon 

 umcricanuiu. Each of these hosts is known to harbor aecia 

 whose telial connection has not yet been experimentally ascer- 

 tained. The material being in unusually good condition an at- 

 tempt was made to sow it on all unconnected aecial hosts avail- 

 able at the time, hoping in this way to strike the right one, no field 

 clues having been secured. This is a precarious method, but in 

 this instance it succeeded, as among the hosts was included 

 Ceanothus americanus, on which a sowing was made June 3, giv- 

 ing rise to numerous pyenia June 12, and an abundance of aecia 

 June 22. 



The telial form of this species was first detected by the writer 

 while preparing the material for the third fascicle of Arthur and 

 llolway's Uredineae Exsiccatae, and was referred to Puccinia 

 Cesatii Schrot, on account of the similarity of the urediniospores 

 to those of that species. 30 Sydow in his Monograph rightly 

 called this reference in question, and suggested that it might be 

 a new species, but did not give a name or description. 40 



The aecial form of this species was described by Ellis and 

 Kellerman in 1884, under the name Aecidium Ccauothi, from a 

 collection made at Manhattan, Kans. The form is not only 

 known from Kansas, but also from Nebraska, and northwestern 

 Wisconsin. 



Puccinia Ceanothi (Ellis & Kellerm.) nom. nov. {Aecidium 

 Ccauothi Ellis & Kellerm., Bull. Torry Club 11:114. 1884.) 



( ) and I. On Ceanothus oratus Desf., Manhattan, Kans., May 

 20, 1884, W. A. Keller man (type) ; Rooks Co., Kans., May, 1898, 



30 Bull. Lab. Nat. Hist. Iowa Univ. 5: 181. 1901. 

 40 Sydow, Monog. Ured. 1: 723. 1903. 



