ARTHUR: NEW SPECIES OF UREDINEAE 123 
Diet., but possesses much larger spores. It is a pleasure to have 
the opportunity to name this rust in honor of an indefatigable and 
able collector, who has contributed largely to the wealth of material 
for study in the rusts as well as in many other groups of plants. 
The material has been secured from many regions during her 
world-wide travels, and has been most generously placed at the 
service of students. 
Aecidium Bourreriae Holway, sp. nov. 
OQ. Pycnia amphigenous, few in small groups, noticeable, 
subepidermal, 128-160 u broad. 
I. Aecia hypophyllous, loosely grouped, short-cylindric, 
0.2-0.3 mm. in diameter; peridium fragile; peridial cells rhombic 
in side view, 13-15 by 23-24u, slightly overlapping, the outer 
wall 6-7 uw thick, transversely striate, the inner wall 3.5-4.5 
thick, closely and rather prominently verrucose; aeciospores 
globoid or ellipsoid, 19-23 by 23-26 uw; wall colorless, rather thick, 
I.5-2.5 u, closely and finely verrucose. 
On Bourreria havanensis Miers, Nassau, New Providence, 
Bahama Islands, March 2, 1903, E. W. D. Holway. Professor 
Holway distributed this collection under the name here used, but 
left the publication of the description to some one else. 
Aecidium Chamaecristae sp. nov. 
Aecidium Cassiae Ellis & Kellerm. Trans. Kans. Acad. Sci. 10: 
91, hyponym. 1887. Not A. Cassiae Bres. 1891. 
O. Pycnia amphigenous, subepidermal, noticeable, in small 
groups, 70—96 uw in diameter. 
I. Aecia amphigenous, loosely grouped upon reddish spots 
2-8 mm. across, cupulate, 0.1-0.2 mm. in diameter, short; peridium 
recurved, erose; peridial cells rhombic or rhomboidal, 16-23 by 
26-35 u, considerably overlapping, the outer wall thick, 9-10 u, 
transversely striate, smooth, the inner wa! thinner, 4-6 yu, closely 
verrucose; aeciospores globoid or ellipsoid, 15-19 by 18-25 u; 
wall colorless, thin, I-1.5 yw, finely and closely verrucose. 
On Chamaecrista fasciculata (Michx.) Greene (Cassia fasciculata 
Michx.), Manhattan, Kansas, 1886, W. A. Kellerman (Ellis & Ev., 
N. Am. Fungi 1825); Lincoln, Nebraska, May 28, 1902, John L. 
Sheldon; same, May 29, 1902, George G. Hedgcock. The species 
has apparently never been described, and the name long since 
chosen was already in use when given. The original collection 
