202 BROOKLYN BOTANIC GARDEN MEMOIRS 
Agricultural Experiment Station during the many fruitful years of 
Dr. Arthur’s administration of the department of botany. Without 
this assistance the preparation of this account in the form presented 
would not have been possible and the writer takes great pleasure in 
acknowledging his indebtedness to Dr. Arthur and to the various 
assistants in this laboratory for any help which they may have given. 
COLEOSPORIACEAE 
1. Coleosporium Adenocaulonis sp. nov. 
O.and I. Pyenia and aecia unknown. 
II. Uredinia hypophyllous, few, scattered on conspicuous angular 
yellowish spots, small, 0.I-0.2 mm. across, early naked, orange yellow 
fading to whitish, becoming pulverulent, ruptured epidermis con- 
spicuous; urediniospores globoid to ellipsoid, 18-24 by 23-26 un, wall 
light golden brown or colorless, 2—3 w thick, prominently and moder- 
ately verrucose; pores indistinct. 
III. Telia unknown. 
On CARDUACEAE: 
Adenocaulon bicolor Hook.—Corvallis, Sept. 20, 1914, 1540. 
This species is very inconspicuous, developing very small sori on 
the under side of the leaves on yellowish spots. 
2. COLEOSPORIUM MADIAE Cooke, Grevillea 7: 102. 1879. 
On CARDUACEAE: II, III. 
Mada citriodora Greene—Mary’s Peak, Benton Co., Aug. 15, 1914, 
1514. 
Madia exigua (Sm.) Greene—Corvallis, July 29, 1914, 1475; 
Philomath, Aug. 15, 1914, 15106. 
Madia glomerata Hook.—Corvallis, Aug., 1889, E. R. Lake, July, 
1O10, 7750, July 29, 19015, 3241; Portland, Aug. 24, 1015, Essbar 
tholomew, 5964 (Barth. Fungi Columb. 4970). 
Madia racemosa (Nutt.) T. & G.—Corvallis, July, 1910, rz60, 
Sept. 12, 1910; 7925; Wren, Benton Co:, June 26; 1914, 13 70jmneme 
1322, 1326; Blk City, Lincoln Co., Aug. 20, 1914, 2535; Philomach 
May I0, 1914, 3246. 
Madia ramosa Piper—Corvallis, July 29, 1914, 1470. 
Madia sativa Molina—Corvallis, Aug. 12, 1910, 11763, July 29, 
1914, 1474. 
The aecial connection of this very common species has not been 
demonstrated by cultures and no field observations have been made 
in Oregon. Judging from distributional data, however, it seems 
probable that Peridermium californicum Arth. & Kern may be gen- 
etically connected. 
