1124 
Journal of Agricultural Research 
Vol. XXVIII, No. 11 
over to rye and survive in the uredinial stage on that host. As volunteer rye 
in the eastern United States usually is heavily rusted in the fall, in the absence 
of Anchusa it seems improbable that the presence of the aecial stage would 
influence the situation to any extent. If the teliospores commonly retain their 
germinability until spring, Anchusa species may be of some importance in that 
they may serve as additional centers for spread of the rust. Our observations 
are not extensive enough to warrant drawing any conclusions as to this possi¬ 
bility, the general situation in Europe indicating its rare occurrence in the spring, 
even there. 
LEAF RUST OF BARLEY, PUCCINIA ANOMALA 
The aecial stage of the leaf rust of barley, Puccinia anomala Rostr. (P. 
simplex [Korn.] Erikss. and Henn.), was unknown until Tranzschel {12), working 
in Russia in 1914, sowed teliospores on plants of Ornithogalum umbellatum L., 
0. narbonense L., Muscari botryoides (L.) Mill., M. tenuiflorum Tausch, Scilla 
sibirica Andr., and Allium angulosum L. Many aecia developed from this 
sowing on Ornithogalum umbellatum and a smaller number on 0. narbonense. 
The other plants remained uninfected. Aeciospores from O. umbellatum were 
sown upon Hordeum vulgare L., producing urediniospores and teliospores. 
We have not been able to find records to show that these results have been 
repeated elsewhere. 
Barley straw, heavily laden with teliospores of the leaf rust of barley, was 
collected at Washington, D. C., Blacksburg, Va., and Mt. Vernon, Wash., in 
the summer of 1921. Part of each of these collections was wintered in a similar 
manner to that described for rye, and part was used to mulch small areas where 
bulbs of the Star-of-Bethlehem, Ornithogalum umbellatum, had been planted. 
The collections of telia, when brought into the greenhouse on March 24, 1922, 
were found to germinate and were sown on Star-of-Bethlehem plants growing in 
pots. Infection was obtained in each case, pycnia appearing April 4, followed 
by aecia April 18 (PI. 1, C). From these cultures, aeciospores were sown on 
barley, producing uredinia typical of Puccinia anomala. The groups of plants 
of Star-of-Bethlehem, mulched in the field with straw of each of these collections, 
also showed infection, pycnia appearing about April 15, followed by aecia. 
On May 18, uredinia developed on barley sown near the aecia-bearing Orni¬ 
thogalum plants. 
During the summer of 1922, barley straw bearing telia of Puccinia anomala 
was collected at Lafayette, Ind., and used to mulch Ornithogalum umbellatum 
in the field. On April 17, 1923*, pycnia were noted upon these plants, followed 
on May 5 by aecia. 
Puccinia anomala more nearly resembles a Uromyces than a species of Puc¬ 
cinia. The teliospores are for the most part one-celled. Indeed, in some col¬ 
lections considerable search is necessary in order to find the two-celled spores. 
According to usage, however, the presence of these few two-celled teliospores 
places the species in the genus Puccinia. A very similar rust, TJromyces hordei 
Tracy, is found in southwestern United States upon a wild barley, Hordeum 
pusillum Nutt. This, however, produces only one-celled teliospores, but is 
otherwise very similar. Arthur {2) has shown that this rust has its aecial stage 
on Northoscordium bivalve (L.) Britton, a species very similar and fairly closely 
related to Ornithogalum umbellatum. Although Arthur was not able to infect 
Ornithogalum with Uromyces hordei, the evident relationship of the two rusts 
invited further study. In March and April, 1920, a telial collection of Uromyces 
hordei, sent by R. S. Kirby from Norman, Oklahoma, was used four times in 
an effort to infect plants of Northoscordium bivalve and Ornithogalum umbellatum. 
