92 BULBS AND TUBEROUS-ROOTED PLANTS. 
as they flower well. They succeed well in a cold frame, 
but must be protected against frost and water during 
winter. ‘They are increased rapidly by offsets. 
F. Ferrariola (/. antherosa).—F lowers green and 
brown. 
F. uncinata.—A curious species; flowers green, 
with a bright blue mark in the center. 
F. atrata.—Very brilliant purple flowers. 
F. divaricata.—F lowers purple and green. 
F. obtusifolia.—This is entirely distinct from the 
other species by the remarkable color of its flowers, and 
its potato-like root. It grows about eighteen inches 
high, and branches in the form of a bush. It flowers in 
June and July, and the bulbs may be taken up in the 
autumn and kept during winter like those of the 
Tigridia, and planted out again in early spring. This 
species is deserving of cultivation, from the great beauty 
and profusion of its flowers. 
FLAG FLOWER. 
A popular name of the Iris. 
FLAME LILY. 
See Pyrolirion. 
FLEUR DE LIS AND FLOWER DE LUCE. 
See Iris. 
FRENCH TULIP. 
The popular name of Tulipa sylvestris. 
FRITILLARIA. 
Guinea-hen Flower. Checkered Lily. 
All of the Fritillarias have drooping bell-shaped 
flowers, with honey drops in the cavity of each petal. 
This nectar is particularly abundant in the Crown Im- 
perial, so much so ag to drop if the flowers are shaken. 
