DESCRIPTIVE LIST OF FLOWERS, 301 
considered and ‘treated in open air culture as a hardy 
annual; it has a succession of yellow tlowers from July 
to October. Two feet high. 
. tetraptera.—White-flowered Evening Primrose.— 
A very beautiful, prostrate-growing, hardy annual from 
Mexico. One foot high, with a succession of pure white 
flowers from July to September, which make their appear- 
ance after the sun has descended below the horizon, and 
perish before it rises in the morning. ‘ 
&. longifléra, an elegant biennial, if the roots can be 
preserved through the winter, but generally cultivated as 
an annual, with uncommonly large and showy yellow 
flowers from July to October. A native of Buenos Ayres. 
Three feet high. ‘ 
Besides these there are cultivated: CG. bistorta, an an- 
nual with small yellow flowers, with a purple eye; @&. 
acaulis, a prostrate white-flowered species from Chili; @&. 
Lamarckiana, a tall species with large yellow flowers; 
and others. All the species are propagated without dif- 
ficulty. The annuals by seed, and the perennials by seed 
or from divisions of the root. 
ORCHIS. 
(The ancient Greek name.] 
We have only one species of Orchis proper in the 
United States, those which are popularly so called belong 
to the genus Platanthera, 
Orchis spectabilis.— Showy Orchis— A low species, 
with a root of fleshy fibres from which are produced two 
fleshy oblong leaves and a flower-stem about six inches 
high, bearing several white and pinkish-purple flowers, in 
‘May. For remarks on culture, sce Platanthera. 
