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Dicotyledons with Polypetalous Flowers . 
Natural Order 
ROSACEA. Tab. 27, 28, 29. 
D iagnosis. —Herbs, shrubs or trees, with alternate stipulate leaves. 
Flowers usually regular. Stamens perigynous, indefinite or definite. Pistil 
apocarpous or spuriously syncarpous, of one or more carpels. Seeds exal- 
buminous. 
A large and very important Natural Order, including several distinct 
types of structure distinguished as Sub-orders, of which the more important 
are : — 
I. CHRYSOBALANEHi. — Flowers often slightly irregular. Carpel 1, free; style basal. 
Ovules 2, ascending. 
Distribution. —Wholly confined to Tropical and Subtropical countries of both the Old and 
New. World, though most numerous in the latter. 
II. PRUNE2E (Tab. 27).— Flowers regular. Carpel 1, rarely 2 or more, free ; style terminal. 
Ovules 2, pendulous. Fruit a drupe. 
Distribution. —Principally confined to the Temperate zone of the Northern Hemisphere, with a 
few Intertropical outliers, chiefly along mountain ranges. None are known from the South Temperate 
zone. 
One British Genus ; Species, 3. 
