
GENTIAN FAMILY—POTATO FAMILY 23 
PRAIRIE GENTIAN EUSTOMA RUSSELLIANUM 
Plate 18, fig. 5 
The Prairie Gentian is one of the largest flowered gentians. Wet 
meadows at 4000-5500 ft. are brilliant in midsummer with the deep 
reddish-purple flowers. The plants rarely grow taller than 15 in. 
BLUE GENTIAN GENTIANA CALYCOSA 
Plate 18, fig. 6 
The deep blue flowers of this Gentian grow in clusters on plants 
5-20 in. tall. They bloom in midsummer and autumn and are found 
in aspen woods and meadows at 8000-12000 ft. Practically all species 
of Gentians yield a substance which is one of the best simple bitters 
and is used in medicine. 
STAR GENTIAN  SWERTIA PERENNIS 
Plate 18, fig. 7 
The starry blue-purple or white flowers of the Star Gentian are 
clustered on stems 3-20 in. tall. They grow along brook-banks and in 
wet meadows and bogs at 8000-13000 ft. and bloom during midsum- 
mer. 
POTATO FAMILY 
PuRPLE GROUND CHERRY QUINCULA LOBATA 
Plate 19, fig. 1 
This Ground Cherry has beautiful purple flowers, each with a 
white-rayed, woolly star in the center of the corolla. The plants are 
low and spreading and 2-8 in. high. They are found in waste places 
and along roadsides at 4000-6000 ft. and bloom in early and mid- 
summer. The common Ground Cherries usually have yellow flowers 
and the berries are edible, often being made into jams and pies. 
