14 Journal of Mycology [Vol. Id 
usually numerous, peripheral, capitate, smooth, 40-50 U long, head 14-20 
fx broad. 
III. Teleutosori amphigenous, or sometimes only hypophyllous, small, 
irregularly roundish and scattered, or somewhat coalescing, subepider- 
mal, at first light reddish brown, becoming deep chocolate-brown; teleu- 
tospores prismatic, 12-14 by 30-44 wall smooth, cinnamon-brown, uni¬ 
formly thin, not thickened at apex. 
Spermogonia and aecidia on Larix, but not yet collected. Uredo 
and teleutospores on Populus deltoides Marsh. (P. Medusae Benth., P. 
Canadensis Moench., P. monilifera Ait., P. angulata Ait.), P. grandiden- 
tata Michx., P. tremuloides Michx., P. balsamifera L., P. angustifolia Jas., 
and P. trichocarpa Torr. & Gr. Common throughout the United States, 
and Canada. 
2. Uromyces Phaseoli (Pers.) Wint.—This is a very com¬ 
mon rust on various species of Phaseolus, Strophostyles and 
Vigna. Nevertheless its aecidial form is rarely seen, and it has 
been suggested that the American form might be heteroecious. 
Material for the cultures was collected near Lafayette, on Stro¬ 
phostyles helvola (L.) Britt. ( Phaseolus diversifolius Pers.). 
It was sown, May i, on Euphorbia commutata Engelm., with no 
infection. On May 15, a sowing was made on Strophostyles hel¬ 
vola, which gave abundant spermogonia on May 26, and well 
developed aecidia began to appear on June 4. Five subsequent 
sowings were made, but owing to difficulty in keeping the host- 
plants in flourishing condition only two of these gave positive 
results, and even these were less abundant than in the first trial. 
The autoecious character of the American form, however, is 
well demonstrated. It should be said that the somewhat common 
aecidium on Apios and Amphicarpa holds a doubtful relation to 
the bean rust, and is better considered distinct until positive 
relationship is established. 
3. Uromyces Lespedezae-procumbentis (Schw.) Curt.— 
This is a wide spread, and often abundant rust, occurring on 
various species of Lespedeza. No aecidium has ever been found 
clearly associated with it. The small and inconspicuous Aecidium 
leucospermum B. & C., rarely collected, has been suggested as a 
possible alternate form, but not very confidently. 
Excellent teleutosporic material was obtained by the writer 
at Fair Oaks, Ind., in March, on the upright stems of Lespedeza 
capitata Michx. It was not until late in May that a host-plant 
was well established in the greenhouse. A sowing of spores was 
made on May 28, the host being L. capitata. Infection resulted, 
but the development was slow, clearly due to inferior growth 
conditions. On June 14 the first spermogonia protruded, soon 
becoming exceedingly numerous, and on June 18, the minute, 
colorless aecidia began to appear in great numbers. The typical 
form of Aecidium leucospermum was the result. 
4. Puccinia caulicola Tr. & Gall.—Fine teleutosporic ma¬ 
terial of this species on the stems of Salvia lanceolata Willd. was 
