10 ILLUSTRATIONS. 



Page. 

 Plate XII. Fig. 1. — Leaves of Euonymus, showing the characteristic spotting 

 caused by Exosporium concentricum. Fig. 2. — Leaves of Euony- 

 mus, showing spots due to Colletotrichum griseum 112 



XIII. Fig. 1. — Leaf of winged elm affected with scab due to Gnomonia 

 ulmea. Fig. 2. — Leaf of red mulberry, showing eye-spot due to Cer- 

 cospora moricola. Fig. 3. — Leaf of live oak, showing tar-spot due 

 to Rhytisma erythrosporum. Fig. 4. — Leaflets of black locust, 

 showing the characteristic spotting due to Cylindrosporium soli- 

 tarium 112 



XIV. Fig. 1. — Leaves of the hackberry blighted by Cylindrosporium 

 defoliatum. Fig. 2. — Leaf of the sycamore blighted by Phleospora 



multiraaculans 112 



XV. Fig. 1. — Leaf of the Japanese privet affected with leaf-spot due to 

 Cercospora ligustri. Fig. 2. — Small branch of mesquite, showing 

 three galls of possible bacterial origin. Fig. 3. — A single large gall 

 on a small branch of mesquite 112 



XVI. Fig. 1. — Portion of leaf of century plant affected with blight due 

 to Stagonospora gigantea. Fig. 2. — Margin of same leaf slightly 



enlarged, showing the distribution of pycnidia 112 



XVII. Fig. 1. — Leaves of geranium affected with bacterial blight. Fig. 



2. — Leaf of begonia affected with bacterial blight 112 



XVIII. Fig. 1. — Leaf of wild morning-glory attacked by Albugo ipomoeae- 

 panduranae. Fig. 2. — Small branch of mountain cedar, showing the 

 gelatinous sori of Gymnosporangium exiguum. Fig. 3. — Leaf-cm-l 

 of trompillo due to nematodes 112 



XIX. Fig. 1. — Leaflet of the wild China tree affected with Cylindrosporium 

 griseum. Fig. 2. — Buds of yucca blighted by Cercospora floricola. 

 Fig. 3. — Inflorescence of yucca blighted by Cercospora floricola.. 112 



TEXT FIGURES. 



Fig. 1. Map of a part of the State of Texas, showing the territory covered and 13 



places visited in connection with the plant-disease survey 



2. Map of that part of the State of Texas presented in figure 1, showing 



the rainfall for 1909 16 



226 



