Jan. 1906] 
Cultures of Ureduieae in 1905 
25 
of a heteroecoius rust, during my seven years of experimental 
work, this is the first instance of success without the aid of some 
probable clue, and in this case may be ascribed to good luck and 
the exuberant enthusiasm of Mr. Kern, who made all the sow¬ 
ings of the season. 
Teleutosporic material on Spartina cynosuroides, collected 
at Palmer, Neb., by Rev. Bates, was sown May 26, on whatever 
plants were available in the greenhouse, that are recorded as 
bearing aecidia of unknown teleutosporic connection. These 
hosts were: Polemonium rcptans, Poly gala Senega, Cassia Cha- 
maecrista, Psoralen Onobrychis, Rudbeckia laciniata, Ambrosia 
artemisiaefolia, Thalictrum dioicum, Viola papilionacea, and Stei- 
roncma ciliatum. To our great surprise A. ciliatum began to 
show spermogonia June 1, and abundant aecidia June 6, all others 
having no infection. Another sowing was at once made, June 2, 
which likewise gave spermogonia June 7, and aecidia June 12. 
The aecidium on this host is recorded or known to the writer 
from Iowa, Illinois, Nebraska, Kansas, Wyoming and Minnesota. 
A collection made in Wisconsin 29 on N. lanceolatum is thought 
by Burrill 30 to be specifically distinct. Schlechtendahl’s name, 
Caeoma Lysimachiae, sometimes used for American specimens, 
was founded on an aecidium on L. thyrsidora L. (Naumburgia 
thyrsidora (L.) Duby) from vicinity of Berlin, and doubtless is 
entirely distinct from American forms, with the possible excep¬ 
tion of the reference in Farlow & Seymour’s Host Index, 31 the 
basis for which is unknown to the writer. Schweinitz’s name 32 
Aecidium Lysimachiae applies to the form on Lysimachia quad- 
rifolia and L. terrestris, only reported from North Carolina, and 
may well be considered distinct. What is now much needed is 
teleutosporic material from the Atlantic and Gulf coasts to be 
used in cultures for testing the above points, and in general the 
question whether the eastern and western forms are one species 
or not. 
The great prevalence of this rust on Spartina, and the com¬ 
parative rarity of the aecidia on Steironema, is doubtless due in 
part to the hardiness of the uredospores, which enable them to 
live over winter and start the uredostage in the spring under 
favorable conditions. This is the opinion expressed by Mr. 
Bartholomew in a recent interview, and is my own opinion, 
founded in part upon finding uredosori upon young blades of 
Spartina only a few inches long at such an early date in spring 
that infection by means of aecidiospores seemed highly improb¬ 
able. 
29 Trelease, Paras. Fung. Wis. p. 30. 
30 Burrill, Paras. Fung. Ill., I. Uredineae, p. 233. 
31 L. c. p.75. 1890. 
32 Schrift. d. nat. Ges. Leipzig 1 : 67. 1822. 
