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. Pycnia and aecia unknown. 



il. Uredinia hypophyllous, few, scattered on conspicuous angular 

 yellowish spots, small, 0.1-0.2 mm. across, early naked, orange yellow 

 fading to whitish, becoming pulverulent, ruptured epidermis con- 

 spicuous; urediniospores globoid to ellipsoid, 18-24 by 23-26 /x, wall 

 light golden brown or colorless, 2-3 fx thick, prominently and moder- 

 ately verrucose; pores indistinct. 



III. Telia unknown. 

 On Carduaceae: 



Adenocaulon bicolor Hook. — Corvallis, Sept. 20, 1914, IS49- 



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. 



Madia citriodora Greene — Mary's Peak, Benton Co., Aug. 15, 191 4, 



1514- 



Madia exigua (Sm.) Greene — Corvallis, July 29, 1914, 1475; 

 Philomath, Aug. 15, 1914, 1516. 



Madia glomerata Hook.- — Corvallis, Aug., 1889, E. R. Lake, July, 

 1910, 1/59, July 29, 1915, 3241; Portland, Aug. 24, 1915, E. Bar- 

 tholomew, 5964 (Barth. Fungi Columb. 4910). 



Madia racemosa (Nutt.) T. & G. — Corvallis, July, 1910, 1160, 

 Sept. 12, 1910, 1928; Wren, Benton Co., June 26, 1914, 1316, 1317, 

 1322, 1328; Elk City, Lincoln Co., Aug. 20, 1914, 2538; Philomath, 

 May 10, 1914, 3246. 



Madia ramosa Piper — Corvallis, July 29, 1914, 1470. 



Madia sativa Molina — Corvallis, Aug. 12, 1910, 1163, 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. 



