Q2 NATURE STUDY AND AGRICULTURE 
ginal rays. It is very fragrant, and the rays are only 5 
to 8 in number and usually droop instead of standing out 
straight like those of the sunflower. The disk or center 
piece is a slender cone or column an inch long and gray- 
ish green in color. The plant is about two feet high and 
bears several flowers at the ends of the branches. Its 
leaves are deeply cut. This is a western 
flower, extending eastward into Minnesota 
and Towa. 
19. Common Evening Primrose. — A 
large, coarse biennial with a rather famous 
-|name. The pure lemon-yellow flowers are 
|pretty enough, but the plant is so rank 
growing that it should be looked upon as 
y a weed. The stems are several feet high 
i and are not branched very much; the 
leaves are alternate. The flowers grow 
ComMMON EVENING i 
Daeoss from the axils of the leaves at the end of 
the stem, opening in the evening and fad- 
ing the next day. They are a typical example of the 
Evening Primrose family and illustrate a very interesting 
flower structure that is worth careful examination. The 
calyx tube adheres to the ovary, is prolonged beyond it, 
and then terminates in 4 narrow lobes; the 4 yellow 
petals and 8 stamens are inserted on the summit of 
the calyx tube; the style is very long, reaching from 
the ovary through the calyx tube and terminating in a 
4-lobed stigma. The cultivated Fuchsia belongs to the 
Evening Primrose family and its flowers have the same 
structure. 
20. Tooth-leaved Evening Primrose.— A more dainty 
plant than the preceding, usually being only 5 to 10 inches 
