

Wi6 = S FLOWERING PLANTS 
in many of the allied Composite, such as the Ox-eye Daisy. — 
There are no stamens, and no ovules are developed in the — 
ovary, so that the ray florets are merely attractive. 
The dise florets also arise in the axil of a bract; the sepals 
are represented by scales; the corolla is tubular, and consists 
of 5 petals; the stamens are united by their anthers, and the 
gynecium, consisting of 2 carpels, is inferior. 
97 | 98 

Fics. 97 AND 98.—RaAy AND Disc FLioret oF SUNFLOWER. 
b, bract ; s, sepals ; c, corolla; a, anther-tube ; 0, ovary ; sg, stigmas. 
Cross-pollination is probable, owing to the development of 
the stamens before the gynecium. The Jerusalem Artichoke 
and the Dahha have much the same structure as the Sun- 
flower. 
Groundsel differs from Sunflower in having all 
the florets tubular. The bracts of the involucre 
are in two whorls; the leaves are tipped with black, and the 
outermost row is shorter than the inner one. The receptacle 
has no scales. The hairy, white pappus is too well known to 
need description. Cross-pollination seldom occurs, as the 
Groundsel. 

