Heald-Wolf: New Species of Texas Fungi 9 



sporium Negundinis Ell. & Ev., and the fungus was first referred 

 to this species by the writers, since the extrusion of the spores 

 from the pycnidia simulated acervuli in external appearance. It 

 is possible that the two are identical. 



Septoria Jatrophae 



Maculis variis, 1-5 mm. latis, orbicularibus, interdum irregu- 

 laribus, primo atro-brunneis, margine atro circumdatis, demum 

 centro fulvescentibus vel saepe griseolis, confluentibus, partem 

 majorem foliorum arescentibus ; pycnidiis omnino immersis, 

 brunneis, 120-150^; sporulis bacillaribus v. leniter clavatis, 

 septatis hyalinis, 40-50 X 3 



On Jatropha stimulosa Michx. Austin, 2429 (type). 



The species causes the formation of very characteristic, brown, 

 circular areas on the leaves. The spots vary in size from 1-5 

 mm., and are frequently somewhat irregular in outline. At first, 

 they are dark-brown with a darker, almost black border; later, 

 the centers become tan and sometimes gray but always have a 

 definite dark margin. The spots are frequently so abundant that 

 they fuse, causing the drying of large portions of the leaf. 



Septoria pertusa 



Amphigenis ; maculis magnis, 1-2 cm., indefinitis, brunneolis, 

 fulvo-marginatis, dein margine pallescentibus, confluentibus ; 

 peritheciis innatis, fuscis, ostiolo amplo pertusis ; sporulis hyalinis, 

 rectis vel leniter curvulis, leniter clavatis, guttulatis, 60-75 X 3 /*• 



On Sorghum halapense L. Luling, 2270; Flatonia, 2722 

 (type). 



The diseased areas are elongated parallel to the veins and 

 1-2 cm. in length, without a definite margin. The brownish 

 center is surrounded by a yellow zone which pales out into the 

 green. These areas become confluent, so that entire leaves may 

 become dry and yellowish-brown in color. The flask-shaped 

 pycnidia are very abundant on both surfaces and protrude by a 

 short papilla. The conidia are extruded so abundantly as to 

 make a white coating. 



Stagonospora gigantea 



Areis marginalis plerumque apice foliorum arescentibus, 

 griseolis, zonatis ; pycnidiis initio subcutaneis, dein erumpentibus, 



