Heald-Wolf: New Species of Texas Fungi 



17 



with a darker border, and uniformly yellowish-brown below. 

 The disease was very abundant in several localities, involving half 

 of the leaf surface and causing the leaves to fall. 



Cercospora floricola 



Areis indefinitis, erlusis, griseolis vel brunneolis, maturitate 

 atrofuscis, perianthium partem majorem v. totum occupantibus 

 saepe scapum insidientibus ; conidiophoris dense fasciculatis 

 brevibus, brunneis, continuis, 30-45 X 5-6 /u, ; conidiis plerumque 

 rectis, cylindraceis v. leniter clavatis, hyalinis vel pallide brunneis, 

 1-5-septatis, 18-69 X 5-5 -5 



On Yucca rupicola Scheele. Austin, 1438 (type). 



In this disease, elongated grayish or brownish patches are pro- 

 duced which become darker with age and spread over the main 

 scape, the flower pedicels, and the outer divisions of the perianth. 

 The creamy-white outer perianth segments may be completely 

 covered with the conidial tufts, which cause them to be turned 

 nearly black and to shrivel more or less. The fungus may spread 

 over the whole segment from the tip downwards. The perianth 

 divisions may be attacked before the flower opens and the flower 

 bud completely blighted or the flower may expand to full size and 

 open in the normal way but blight completely a little later. In the 

 locality where the disease was prevalent fruit formation did not 

 take place. 



Cercospora fulvella 



Epiphyllis interdum amphigenis ; maculis irregularibus, flavido- 

 brunneis, 5-10 mm. diam., confluentibus, areas magnas insidienti- 

 bus necantibusque, inferne pallidioribus ; conidiophoris aggre- 

 gatis, septatis, 40-150X4-5/*; conidiis clavatis, rectis, 3-4- 

 septatis, pallide brunneis, 40-60 X 4-5 ^- 



On leaves of Verbesina texana Buckl. Austin, 406 (type). 



This disease is characterized by the presence of irregular 

 yellowish-brown areas, which sometimes become confluent, caus- 

 ing the death of larger areas. The color is more dilute and the 

 spots are less definite on the under surface of the leaf. 



Cercospora lanuginosa 



Epiphylla ; maculis foliorum primo indefinite marginatis, atro- 

 brunneis, deinde 1-3 mm. lata, definita, margine brunnea cinctis, 



