74 A PLAST-DISEASE SURVEY IX TEXAS. 



Eye-spot (Cereospora moricola Cke.). — This fungus produces cir- 

 cular or subcircular spots 3 to 7 mm. in diameter on the leaves. The 

 center is tan colored, with a very dark outer zone and outside of this 

 a halo of yellowish brown, paling out into the green. | PI. XIII. fig. 

 2.) The conidiophores. densely tufted, pale yellow. 20 to 25 by 3 to 

 3.5 p.. are on the lower surface. The conidia are clavate. 30 to 75 by 

 ■i to 4.5 u. slightly colored, two to eight septate, guttulate. | PI. IV. 

 fig. 6. ) This is a common disease on both wild and cultivated forms. 



Specimens collected: On Morns rubra L. — Llano. 1747: Luling. 2273: Segnin, 

 22S2 : Victoria. 2512 : Nursery, 255S. 2565 : Stockdale.. 2607 : Hallettsville. 2796. 



Leaf-spot (Cereospora mdssouriensis Wink). — Large, orbicular, 

 dark-brown spots are formed on the leaves. They vary in size from 

 3 to 7 mm. and usually have a slightly darker border. The coni- 

 diophores are borne on the lower surface in dense tufts. 



This species is listed by Saccardo (M) under C. pidvimdata Saec. 

 and Wint. 



Specimens collected: On Moras rubra L. — Austin. 465. 469: Beeville. 1S44 : 

 Falfurrias. 2459; Cuero. 2597: Floresrille, 2542. 



leaf-spot (CereosporeUa mori Pk. 1 ). — This diseased condition of 

 the foliage is characterized by the formation of irregular, circular 

 or angular spots 1 to 8 mm. in diameter. The areas are brown in 



I r. with a darker border. A conspicuous cushionlike cluster of 

 white or pinkish conidia is extruded near the center, or they may 

 be scattered over the surface of the spots. These acervuli are for the 

 most part on the under surface of the leaf, and are 50 to 100 ,u in 

 diameter. The conidiophores are faintly smoky. The conidia are 

 slightly clavate. several septate, hyaline. 35 to 75 by 3 to 1 u. i PL 

 YIL fig. 8.) 



Specimens collected: On Morns alba L. — New Braunfels. 16-54. 1721: Beeville, 

 1532: Seguim 2.330; Austin. 31S4. 



OAK. 



Ball moss (TiUandsia recur': at a L/). — This lives epiphytically on 

 the oak (Quereus spp.) throughout the entire range except the ex- 

 treme western and northwestern portions covered by this survey. It 

 is quite commonly considered as parasitic, since it occurs so abun- 

 dantly and is so apparent on dead trees. Death is probably due to 

 shading of the foliage in addition to edaphic and climatic factors. 



Leaf -spot I Marsoma que reus Pk. ). — The spots. 1 to 2 mm. in diame- 

 ter, are whitish or grayish brown above and brown below. The areas 

 are often bordered by a narrow purplish zone. 



Specimens collected: Elgin. 2008; Victoria. 2502: Stockdale. 2644: Flatonia. 



2735. 



1 This fungus has been determined as CereosporeUa mori nov. sp. by Prof. C. H. Peck, 

 to whom specimens were sent for identification. 

 226 



