FAMILIES OF FLOWERING PLANTS 233 
Fic. 202. Flowering branch and enlarged flowers of a typical labiate plant 
(Zeucrium). After Coulter’s ‘‘ Plant Structures,” by courtesy 
of D. Appleton & Co. 
cooking, and become one of our most nutritious vegetables. In Japan 
the fruits of S. album and S. Aethiopicum are used as food, and in South 
America and Australia, other species are employed for the same purpose. 
Several species, such as 8. indigoferum, are cultivated for the sake of 
the dyes which they yield. Many of the nightshades are disagreeable 
weeds, particularly in warm latitudes; in this category may be men- 
tioned the horse-nettle (S. Carolinense) and the black nightshade (8. 
nigrum). A few species, as 8. Seaforthianum, are cultivated for their 
flowers. 
The tomato belongs to the allied genus Lycopersicum, and has been 
wonderfully developed in the hands of horticulturists. The ground- 
cherry or ground-tomato, belongs to the rather large genus Physalis. 
A number of ornamental plants, such as the Petunia, the Datura and 
species of Cestrum belong to the family. Datura includes also the 
familiar “jimson-weed” of our southern States (see Fig 203); though 
