DESCEIPTION OF PLATES. Ill 



Plate VII. Fungi from various hosts. Fig. 1. — Asci and spores of Dimero- 

 sporium parkinsoniae Ileald and Wolf on retama {Parkinsonia aculeata L.). 

 Fig. 2. — Three forms of conidiospores of D. parkinsomac Ileald and Wolf. 

 Fig. 3. — Section through a conidial tuft of Ccrcospora kaki Ell. and Ev. 

 on persimmon (Diospyros kaki L.). Fig. 4. — Conidlophores and conidla of 

 Clasterosporium diffusiim Heald and Wolf on pecan {Hicoria pecan 

 (Marsh.) Britt). Fig. 5. — Section through a sporodochium of Exosporium 

 concentricum Heald and Wolf on Euonymus japonicus Thunb. Fig. 6. — 

 Conidiophores of Ilclminthosporium oiganteum, Heald and Wolf on Ber- 

 muda grass (Capriola dactylon. (L.) Kuutze). Fig. 7. — One of the spores of 

 H. giganteum Heald and Wolf on Bermuda grass (C. dactylon (L.) Kuntze). 

 Fig. 8. — Section through an acervulus of Cercosporella mori Fk., showing 

 the conidiophores and conidia on mulberry (ilorus alba L.). 

 Plate VIII. Fig. 1. — Leaflet of the date palm (Phoonix dactylifera L.), showing 

 numerous pustules of Graphiola phoenicis (Moug.) Poit. Fig. 2.— Leaf of 

 grape (upper surface), showing numerous dark blotches due to Ccrcospora 

 viUcola (Ces.) Sacc. Fig. 3. — Bacterial twig-canker of the plum 

 {Priinus sp. ). 

 Plate IX. Fig. 1. — The roots of a tomato plant (Lycopersicon esculentum 

 Mill.) deformed by nematodes {Hcterodcra radicicola (Greef) Mul.). 

 Fig. 2. — Root-knot of muskmelon {Cucumis melo L.) due to Hcterodcra 

 radicicola (Greef) Mill. Fig. 3.— Leaves of the Lima bean (Phaseolus 

 lunatus L.) affected with leaf-spot due to Ccrcospora canescens Ell. and 

 Martin. 

 Plate X. Fig. 1. — Young watermelons {CitruUus vulgaris Schrad.) affected 

 with blossom-end blight and rot. Fig. 2. — Potato {Solarium, tuberosum L.) 

 with nodules formed by Rhizoctonia. Fig. 3. — A young cymling (Cucur- 

 bita pepo L.) almost destroyed by Botrytis cinerea P. 

 Plate XL Fig. 1. — Balansia hypoxylon (Pk.) Atk. on the inflorescence of feather 

 grass (Stipa leucotricha Trin.). Fig. 2.— Portion of a leaf of sorghum 

 (Andropogon sorghum (L.) Brot.) affected with blight due to Collctotrichum 

 lineola Cda. Fig. 3. — Roots of cotton (Oossypium herbaceum L.) affected 

 with root-rot due to a new species of sterile fungus. 

 Plate XII. Fig. 1. — Leaves of Euonymus japonicus Thunb., showing the char- 

 acteristic spotting caused by Exosporium concentricum Heald and Wolf. 

 Fig. 2. — Leaves of E. japonicus Thunb., showing spots due to Colletotrichum 

 griseum Heald and Wolf. 

 Plate XIII. Fig. 1. — Leaf of winged elm {Vlmus alata Michx.) affected with 

 scab due to Gnomonia ulmea (S.) Thm. Fig. 2. — Leaf of red mulberry 

 {Morus rubra L.), showing eye-spot due to Ccrcospora moricola Cke. 

 Fig. 3. — Tar-spot on the live oak (Quercus virginiana Mill.) due to Rhytisma 

 erythrosporum B. and C. Fig. 4. — Leaflets of black locust {Robvnia pseuda- 

 cacia L.), showing the characteristic spotting due to (Cylindrosporium 

 solitarium Heald and Wolf. 

 Plate XIV. Fig. 1. — Leaves of the hackberry {Celtis laevigata Willd.). 

 blighted by Cylindrosporium defoliatum Heald and Wolf, Fig. 2. — Leaf of 

 the sycamore (Platanus occidentalis L.), blighted by Fhleospora multi- 

 maculans Heald and Wolf. 

 Plate XV. Fig. 1. — Leaf of the Japanese privet (Ligustrum japonicum Thunb.) 

 affected with leaf-spot caused by Ccrcospora Ugustri Roum. Fig. 2.— 

 Small branch of mesquite {Prosopis glandulosa Torr.), showing three galls 

 of possible bacterial origin. Fig. 3. — A single large gall on a small branch 

 of mesquite. 

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