22 



Mycologia 



On Hedera Helix L. San Marcos, 2130 (type). 



Large irregular spots, grayish-brown above and brown below, 

 appear on the living leaves. The margin of the diseased area 

 is elevated, with the conidial tufts on the upper surface. 



Ramularia Momordicae 



Maculis initio indefinitis, flavidis, turn demum suborbiculari- 

 bus, superne flavido-brunneis, plus minusve zonatis, 1-10 mm. 

 diam., inferne margine elevato, atro-brunneis, saepe numerosis, 

 confluentibus, folium totum arescentibus ; hyphis caespitosis, 

 brunneis, 30-45 X 4~5 /* '> conidiis cylindraceis, hyalinis, 1-5- 

 septatis, 42-65 X 4~5 



On Momordica balsamina L. Falfurrias, 24.82 (type). 



In the early stages of this disease the leaves show irregular 

 blotches of yellow, and as it advances there are formed, on the 

 upper side of the leaf, circular to subcircular yellowish-brown 

 areas with a more or less evident zonation. The spots are often 

 so numerous as to be confluent, causing the leaves to curl and 

 become dry. A large amount of defoliation results. 



Exosporium concentricum 



Areis subcircularibus, .5-2 cm., diam. ; zonatis, brunneis v. 

 flavidis interdum griseis, zona angusta brunnea cinctis ; sporo- 

 dochiis concentricatis v. sparsis, initio innatis ; conidiis clavato- 

 cylindraceis, septatis, subhyalinis, rectis vel leniter curvulis, 

 25-45 X 2.5-3 



On Euonymus japonicus Thunb. San Marcos, 2129; George- 

 town, 2375; Austin, 286 J (type). 



This fungus produces on the leaves of the Chinese box cir- 

 cular, zoned areas. The affected leaves may show considerable 

 yellowing beyond the diseased areas and in severe cases much 

 defoliation follows. The sporodochia are at first covered and at 

 length protrude, causing that portion of the leaf to become 

 grayish, because the rupture of the epidermis has admitted the 

 air. 



University of Texas, 

 Austin, Texas. 



