388 MISSOURI BOTANICAL GARDEN BULLETIN 
Class E—Pompon. 
Class F—Seedling. 
Class G—Single. 
Class H—Show. 
Section I1—Collection of ten varieties (one bloom to a vase). 
Section I1I—Collection of five varieties (one bloom to a vase). 
Section 1V—Vase of ten blooms (one variety). 
Section V—Vase of five blooms (one variety). 
Section VI—Most artistic vase; receptacle and arrangement 
considered (one or more varieties and any number per- 
mitted). 
Section VII—Most artistic basket arrangement; receptacle 
and arrangement considered (accessories permitted). 
That classes in Section I may be understood, the following 
classification of the dahlia as adopted by the American Dahlia 
Society is given below: 
Cactus Daniias—(a) A true, fluted type: Flowers fully 
double; floral rays (petals) long, narrow, ineurved or twisted, 
with sharp, divided, or fluted points and with revolute (rolled 
back) margins, forming, in the outer florets, a more or less 
perfect tube for more than half the length of the ray. 
(b) Hybrid cactus or semi-cactus type: Flowers fully 
double; floral rays short as compared with previous type, 
broad, fiat, recurved or twisted, not sharply pointed except 
when tips are divided (staghorn), margins only slightly revo- 
lute, and tubes of outer florets, if any, less than half the 
length of the ray. 
DecorativE DanLtias—Double flowers, full to center in early 
season, flat rather than ball-shaped, with broad, flat, some- 
what loosely arranged floral rays with broad points or 
rounded tips which are straight or decurved (turned down 
or back), not ineurved, and with margins revolute if rolled 
at all. 
BaLL-SHAPED, DouBLE Danuias—(a) Show type: Double 
flowers, globular or ball-shaped rather than broad or flat, full 
to center, showing regular spiral arrangement of florets; floral 
rays more or less quilled or with markedly involute margins 
and rounded tips. 
(The class called fancy dahlias is not recognized separately 
in this classification, but is included in the sub-section a.) 
(b) Hybrid show, giant show, or colossal type: Flowers 
fully double, broadly hemispherical to flatly globular in form, 
