been able to determine, this is an"undescribed species. It bears 
pure white flowers and its very small tubers are white and trans- 
lucent. 
The genus Physalis is well represented in Mexico by wild 
species, many of which contribute edible sweet fruits, besides 
which there are several cultivated varieties, their specific identity 
very uncertain, which contribute vast quantities of so-called 
Fic. 3. Lava Beds Covered with Fern Growth, near Ajusco, Mexico. 
“tomaties.” These are mostly not sweet, but rather highly 
flavored and are used as ingredients of various dishes. 
To the edible fruits of Mexico, I must give special attention. 
Passing over the better known fruits, such as apples, pears, 
