56 Ammobroma, a JSTew Genus of Plants. 



Ammobroma, differ from Monotropacese in the stamens being 

 perigynous not hypogynous, with the pollen distinctly trian- 

 gular ; and in the numerous cells of the ovary with only a single 

 ovule in each cell. As the mature fruit is unknown we are 

 uncertain as to the character of the seeds, but there is no indi- 

 cation of their being loose-skinned. On the whole, therefore, 

 it would seem that these three genera form a very natural 

 group by themselves, which may be regarded as a tribe or sub- 

 order, to be named Lennoeee ; the genus Lennoa having been 

 published by Llave & Lexaza a year earlier than the Corallo- 

 phyllum of H. B. & Kunth. 



DESCRIPTION OF THE PLATE. 



Fig. 1. Upper part of the plant of the natural size. 



" 2. Longitudinal section of the same, showing the mode of inflo- 

 rescence. 



" 3. A portion of the root, and that of the plant to which it is attached 

 as a parasite. 



" 4. A flower, magnified. 



" 5. One of the divisions of the calyx, more magnified. 



" 6. The same, with its calyx removed, and the corolla laid open, 

 magnified. 



" 7. A stamen ; back view, magnified. 



" 8. The same ; front view. 



" 9. A grain of pollen, highly magnified. 



"10. A pistil, with a longitudinal section of the ovary, considerably 

 magnified. 



" 11. A cross-section of the same, equally magnified. 



Columbia College, New York, September, 1864. 



