Vol. 10, 1923] 



170 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Explanation of Plate 



PLATE 9 



All drawings made with the aid of the camera lucida. 



Fig. 1. Section of the wall of a pod showing mycelium in the cells. 



Fig. 2. Section of a stem showing mycelium in cells of a vascular bundle. 



Fig. 3. Mycelium in the indurated seed-coat. 



Figs. 4, 5, and 6. Hyphae penetrating the walls of tracheids. 



Fig. 7. Cross-section oi a stem showing position of the pycnidia. a, portion of 

 the cortex composed of cells with thin walls; b, portion of cortex composed 

 largely of cells with thick walls; c, position of the endodermis. 



Fig. 8. Pycnidium with two chambers. 



Fig. 9. Cross-section of a stem showing a vertical section of a pycnidium. 



Fig. 10. Cross-section of a pycnidium showing the oval outline. 



Fig. 11. Sections of a beak of a pycnidium. 



