This group covers the plants belonging to N.O. Rosaceae, of the class Icosandria. At first sight the plants of this order, and those belonging to the buttercup family, might seem to belong to the same group. They are, however, easily distinguished. The rose family has (with one or two exceptions) the stamens attached to the petals or calyx, not to the receptacle. The fruits are usually pulpy and edible, scarcely one being poisonous. In the next group the stamens are on the receptacle, the fruits are dry, and the plants nearly all more or less poisonous. Omitting the fruit trees, such as the cherry, crab, medlar, and hawthorn, all the plants in this group have numerous pistils.
Structure and Habit.
Sweet creamy blossoms, reaching 3 feet.
Yellow, seeds like shepherd's crook.
Yellow or white flowers, a dozen species.
Marsh C. . .
Dingy purple, fruits dry, strawberry-like.
White flowers, fruit well known.
Many kinds, yielding the blackberry.
The different wild roses are numerous.
A second kind found in South of England.
Burnet. . .
Flowers in purple heads, few stamens, leaflets many.
Lesser B. . .
Chalk . .
Leaflets many, stamens many, smaller than last.
Fields . .
Given in Group iii (20) because of few stamens.
Fig. 31. - Arum Spathe and Spadix. (P) Palisade to keep insects inside the flower.
(See Group xviii).