EXPLANATION OF THE PLATES. 



PLATE I. GREGGIA CAMPORUM, p. 9. 



Fig. 1. A flower enlarged. 



" 2. The pistil, with the lobed hypogynous disk, more magnified. 



" 3. The silique, in dehiscence, showing the seeds, &c., magnified. 



" 4. The same cut across. 



" 5. A thin transverse section of the silique, more magnified, showing the compression contrary 



to the dissepiment. 



" 6. A seed more magnified. 



" 7. Transverse section of the same. 



" 8. A portion of the tissue of the dissepiment, highly magnified. 



PLATE II. WISLIZENIA REFRACTA, Engelm., p. 11. 



Fig. 1. Vertical section of a flower-bud, magnified. 



2. An expanded flower, magnified. 



3. Transverse section of the ovaiy, magnified, showing the four ovules in place. 



4. The pistil, magnified, with the ovaiy vertically divided. 



5. The fruit, with its stipe and pedicel, enlarged. 



6. Magnified vertical section of the fruit, and of the single seed which fills each cell. 



7. The persistent fenestrate dissepiment from which the valves have fallen, with a part of the 

 style and stipe, magnified. 



8. One of the valves from the same. 



9. A seed detached, magnified. 

 10. A transverse section of the same. 



PLATE III. A. TALINOPSIS FRUTESCENS, p. 15. 



Fig. 1. A small fructiferous branch of the plant, of the natural size. 



2. An expanded flower. 



3. A detached petal with its fascicle of stamens, magnified. 



4. A stamen, more magnified. 



5. Pistil, equally magnified. 



6. Vertical section of the same, showing the placenta and ovules. 



7. An ovule detached, more magnified. 



8. Dehiscent pod, with the persistent calyx, enlarged. 



