128 
Mycologia 
This species was successfully cultured in 1902 and again in 1907 
on Anemone canadensis.^ A recent monographic study of Amer- 
ican grass rusts confirms the early opinion® that this species is 
similar, morphologically and in host requirements, to P. Mag- 
nusiana of Europe, which has been found to have aecia on Ra- 
nunculus acris and R. bulbosus. Aecia were collected by Dr. 
Brenckle on R. sceleratus, May 30, 1908, near Kulm, N. Dak., 
which are structurally similar to the American form on Anemone, 
as well as to the European form on Ranunculus. An appeal to 
Dr. Brenckle for living plants of R. sceleratus was met with some 
difficulty upon his part, but successfully, and telial material also 
was sent from a locality not far away from the place where aecia 
on R. sceleratus had been obtained, but nothing definite has been 
proven. It still seems probable, however, that P. simillima is but 
a racial variant of P. Magnusiana, and that a race may finally be 
found in America with aecia on Ranunculus, although the common 
form is on Anemone. 
4. PucciNiA Rhamni (Pers.) Wtttst., on Nothoholcus lanatus 
(L.) Nash (Holcus lanatus L.), sent by Prof. H. S. Jackson from 
Corvallis, Ore., was sown April 2 on Rhamnus cathartica and 
Lepargyraea canadensis, with no infection. Another collection 
of the rust on Scolochloa festucacea (Willd.) Link, sent by Dr. 
J. F. Brenckle from Kulm, N. Dak., was sown May 8 on Lepar- 
gyraea canadensis and Eleagnus argentea, and again May 21 on 
Rhamnus cathartica, all without infection. ■ Aecia are known to 
be common about Corvallis on Rhamnus Purshiana, but not found 
on Lepargyraea, the host being absent from the region, while at 
Kulm aecia are common on Eleagnus, but whether the latter 
belong to a race of P. Rhamni, or to an independent species is not 
yet known. 
5. PucciNiA Agropyri E. & Ev., on Hordeuni jubatum L., 
sent by Dr. Brenckle from Wiedmer’s Lake, N. Dak., was sown 
May 13 on Anemone cylindrica, Clematis ligusticifolia, and Aqui- 
legia sp., without infection. Recent monographic study of the 
5 Bot. Gaz. 35:20. 1903; and Jour. Myc. 14; 13. 1908. 
8 Arthur, The Uredineae occurring upon Phragmites, Spartina and Arundi- 
naria in America. Bot. Gaz. 34: 18. 1902. 
