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Dicotyledons with Polypetalous Flowers — Rosacea-. 
Distribution. —This Sub-order is based solely on the genus Rose {Rosa), which is almost restricted 
to the North Temperate zone, and more numerous in the Old World than in the New. A few extend 
southward between the Tropics, but none are indigenous in the South Temperate zone. 
One British Genus; Species, .6-12. 
VII.—TOMACE./E (Tab. 29). —Flowers regular. Stamens indefinite. Carpels 1-5, the ovaries 
inferior, inclosed by the adherent receptacle or calyx-tube. Ovules usually 2, ascending. Fruit succulent. 
Number of British Genera, 3 ; Species, 8. 
Leaves simple as in Apple, Pear (. Pyrus ), Cherry (Prunus), Almond ( Amycjdalus ), and Thorn (Cratcegus): or 
digitately trifoliolate or quinquefoliolate as in Strawberry ( Fragaria ) and some Potentillas ; or pinnate as in Silver- 
weed (.Potentilla anserina) and Rose. 
Flowers pentamerous or tetramerous ; apetalous in Lady’s Mantle ( Alchemilla) and the Burnets (Poterium 
and Sanguisorba); involucrate in Potentilla and Lady’s Mantle. 
STAMENS indefinite ; or definite in Great Burnet ( Sanguisorba ) and Lady’s Mantle. 
Fruit various ; a solitary drupe, with a smooth stone (putamen) in Cherry, or with a wrinkled stone in Peach 
and Almond ; numerous minute drupes ( drupels ) upon a conical receptacle in Blackberry and Raspberry ( Rubus ) ; 
a single free achene inclosed in the dried receptacle in Burnet; a head of achenes upon a convex dry receptacle in 
Potentilla, or upon a fleshy convex receptacle in Strawberry ( Fragaria ), or inclosed in a succulent receptacle in 
Rose ; a whorl of small follicles in Meadow-Sweet ( Spiraea); a fleshy receptacle investing and adnate to the cartila¬ 
ginous carpels in Apple and Pear (Pyrus), or to bony carpels as in Thorn ( Cratcegus ). 
USES, &c.—The Natural Order Rosacea includes nearly all of our more valuable orchard trees as well as 
many of our most beautiful garden flowers. 
The tropical group CHRYSOBALANE^E includes a few species affording edible fruit, as the Cocoa Plum of the 
West Indies (Chry sob alarms Icaco ). The bark of the Caraipi or Pottery-tree (Moquilea) of the Amazons, powdered 
and mixed with clay, is used in making utensils capable of withstanding a great heat. 
