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Amplucarpea monotica. 25 
(a) Subterranean Legume Resulting from Buried Purple Flower. 
The surface of the legume with its raised stomata, its numer- 
ous hairs, including the form with multicellular base, was not to 
be distinguished from that of any typical subterranean legume. 
No indurated elements were to be found in the walls. The seed 
filled the entire cavity ; its coat showed but the one indurated 
layer typical of the subterranean seed; not the slightest indi- 
cation of the great supporting hypodermal layer of the aerial 
seed could be discovered. The size of the cotyledonary cells, 
also the size and shape of the starch granules, agreed with 
those previously described for the normal subterranean seed. 
(b) Legume Resulting from Burying a Flat but Well-Developed 
Legume Produced from a Green Aerial Flower. 
The external appearance of the legume was strikingly 
subterranean in color and fullness, owing to the swelling 
of the seeds (two in number), which quite filled the space 
within. The sutures were as distinct as upon any aerial 
legume. Upon opening the pod, the entire inner epidermis 
had separated as a sheet of tissue from the remaining portion 
of the walls. Exactly what agencies caused this is question- 
able. It may have been the combined action of the new con- 
ditions, or perhaps of moisture alone. The surface of the 
legume was typically aerial in character, possessing no stomatic 
papillz, and but a scanty growth of hairs. The short rods in 
the supporting layer were well developed. Chlorophyll could 
not be detected, but a pinkish-purple coloring was irregularly 
diffused through the etiolated cells. The seeds, however, 
were subterranean in all details of structure and in contents. 
(c) Legume Resulting from Burying a More Mature Legume 
Produced by Green Aerial Flower. 
This aerial legume having already assumed its character- 
istic form, showed but little change after experiment. An 
inclination to turn brown was observed, but this would have 
