XII Journal of Agricultural Research voi. iv 



Plate XLVII. Rheosporangiumaphanidcrynatum: Fig. i. — Fertilized egg show- 

 ing the two functional nuclei nearing juxtaposition. Fig. 2. — Fertilization 

 taking place before the central vacuole of the egg has entirely disappeared. 

 Fig. 3. — Maturing oospore showing the large central food body and the 

 fused nucleus with two polar nucleoli. Fig. 4. — Oospore after the second 

 nuclear division. Fig. 5. — Fertilization: Cytoplasm and functional nu- 

 cleus passing from antheridium to oosphere. Fig. 6. — Fertilization occur- 

 ring before degeneration of the supernumerary nuclei. Fig. 7. — First di- 

 vision of the fused nucleus in the oospore 292 



Plate XLVIII. Rheosporangium aphanidermatum: Fig. i. — Section of prespo- 

 rangium showing intermediate stage of vacuolization. Fig. 2, 3. — Devel- 

 oping oogonia and antheridia. Fig. 4. — Oospore after nuclear fusion show- 

 ing accumulation of food material at the center. Fig. 5. — Fertilized egg 

 showing functional nuclei within the deeper stained central portion. 

 Fig. 6. — Fertilized egg showing functional nuclei in juxtaposition within 

 central mass. Fig. 7. — Fertilized egg showing nucleus after fusion within 

 the deeper stained central portion and position of decolorized food bodies. 

 Fig. 8. — Typical fertilization: Functional egg nucleus in deeply staining 

 center of oosphere; others degenerating at the periphery'. Fig. 9. — Young 

 oogonium and antheridium showing the central vacuole and the peripheral 

 arrangement of the nuclei. Fig. 10. — Fertilized egg: Oospore wall formed 

 but not thickened, functional nuclei in juxtaposition within central mass, 

 and food bodies in surrounding cjiioplasm 292 



Heredity of Color in Phlox Drummondii 



Plate C (colored). Phlox dncmmondii: Fig. 9. — Seed parent, Eclipse variety. 

 Fig. c? . — Pollen parent, Carnea variet)^ Fig. Fj. — First-generation hybrid 

 between Eclipse and Carnea. Fig. A to M. — Second-generation hybrids 

 between Eclipse and Carnea 302 



Plate D (colored). Phlox drummondii: Fig.?. — Seed parent, Cocclnea variety . 

 Fig. c?. — Pollenparent, Carnea variety. Fig. Fj. — First-generation hybrid 

 between Cocclnea and Carnea. Fig. A to G. — Second-generation hybrids 

 between Cocclnea and Carnea 302 



Plate E (colored). Phlox drummondii: Fig. 9 . — Seed parent, Large Yellow 

 variety. Fig. c? . — Pollen parent, Carnea variety'. Fig. Fi. — First-genera- 

 tion hybrid between Large Yellow and Carnea. Fig. A to H. — Second- 

 generation hybrids between Large Yellow and Carnea 302 



Asparagus-Beetle Egg Parasite 



Plate XLIX. Tetrastichus asparagi: Fig. i. — Female adult. Fig. 2. — Egg, 

 laid singly. Fig. 3. — Eggs, laid in pairs. Fig. 4. — Larva. Fig. 5. — Pupa, 

 ventral view. Fig. 6. — Pupa, side view showing inconspicuous wing pads . 314 



ASCOCHYTA ClEMATIDINA, THE CaUSE OP StEM-RoT AND LEAF-SpOT OP 



Clematis 



Plate L. Cletnatis paniculata: Portion of vine showing the general nature of 



the leaf-spot 342 



Plate LI. Clematis paniculata: Group of leaves enlarged to show the zonatlon 



and pycnidia of the spots 342 



Plate LII. Fig. i. — Clematis paniculata: A portion of a vine 44 Inches long 

 that showed Indications of wilting of the lower leaves while the distal 

 leaves were still turgid. Fig. 2. — Ascochyta clemaiidina: Chlamydospores 

 as formed on starch agar. Fig. 3. — Ascochyta cleinatidina: Camera-lucida 

 drawing of spores 342 



