298 BULBS AND TUBEROUS-ROOTED PLANTS. 
Duc van Thol.—Yellow and red variegated. 
Tournesol.—Red and yellow. 
There are numerous other varieties used for forcing, 
each florist having a favorite. Those possessing the 
most positive colors, either scarlet, yellow or white, find 
the readiest sale. The same are preferable for the win- 
dow garden. 
TYDEA. 
A section of the genus Achimenes, Page 1. 
URCEOLINA. 
U. pendula and a variety, awrea, belonging to 
this small genus of very pretty bulbs, are found growing 
in dense shade in the Peruvian Andes. The flowers are 
yellow, tinged with red, and with a bright green edge. 
They have strange markings. The variety, aurea, has 
yellow flowers, with less conspicuous markings. ‘They 
thrive in a shaded border, flowering in summer, but the 
bulbs require to be taken up in autumn, and kept very 
dry and warm during winter. They are increased by 
offsets, the new bulbs pushing a considerable distance 
away from the old ones. U. miniata (Pentlandia) has 
scarlet nodding flowers. 
URGINEA. 
The medicinal Squills is obtained from U. maritima. 
The cultivation is the same as for Scilla, Page 272. 
UROPETALUM. 
A small genus of Cape bulbs formerly included in 
Hyacinthus and Lachenalia. They have no real beauty, 
but are occasionally seen in collections of curious plants. 
This genus is now called Dipcodt. 
VALLOTA. 
See Page 23. 
