184 THE BOSE TAMILT. 



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10 { 



No petals. (Herbs.) 5 



Four, five, or more petals. (Herbs or shrubs.) 8 



r I Leaves palmately lobed or digitate. Flowers in loose panicles or cymes .... 6 



I Leaves pinnate. Flo i ers in heads 7 



- f Calyx single, 4-lobed 9. Aichemii,. 



I Calyx double, 5 large and 5 small lobes 8. Sibbaldia. 



-/ Heads purplish. Flowers hermaphrodite, with 4 stamens . . . 10. Sanguisoeb. 



1 Heads green. Flowers dioecious, the males vrith numerous stamens. 11. Poteeium. 

 (, r Calyx-tube short and nearly iJat, not enclosing the carpels 9 



\. Calyx-tube closing over the carpels or seeds 14 



(Calyx single _ ... 10 

 Calyx double, having as many external bracts as divisions, and alternating with 



t_ them 12 



Calyx-segments 5 11 



. Calyx-segments about eight. Carpels dry and distinct when ripe ... 3. Detas. 

 ,, r Carpels dry, opening when ripe 2. Spie.ea. 



1. Carpels succulent, forming a kind of granulated berry 5. EnBUS. 



-. n f Carpels dry , ending in a long jointed awn 4. AvENS. 



1 Cai-pels without awns, small and seed-like 13 



f^Carpels few, on a minute dry receptacle 8. Sibbaldia. 



13-j Carpels numerous, on a small, flat, dry receptacle 7. Potentil. 



(^Carpels numerous, on a large, succulent receptacle 6. Steawbeeet. 



,.f Trees or slirubs. Calyx-tube fleshy. Fruit succulent or fleshy 15 



\ Herbs. Calyx-tube dry, small, with hooked bristles forming a burr 12. Agbimony. 



I'Fruit enclosing from 1 to 5 cells or hard nuts, arranged round the central axis, 

 IB-J and each with 1 or 2 seeds 14. Pteus. 



l^Fruit enclosing several hairy, seed-like carpels irregularly placed . . , 13. Rose. 



Tliese G-enera are usually distributed into three Tribes, considered by some 

 botanists as distinct Orders, viz. : — 



1. Amtgdalej!. Calyx deciduous. Carpels 1, free. Genus: — 1. Peitntts. 



2. RosEiE. Calyx persistent. Carpels 1 or more, free (but sometimes included in the 

 closed calyx). Genera: — 2. Spie^a ; 3. Detas ; 4. Avens ; 5. Eubus ; 6. Steaw- 

 beeet; 7. Potentil; 8. Sibbaldia; 9. Alchemil; 10. Sangdisoeb; 11. Poteeium; 

 12. Ageimosy ; 13. Rose. 



3. PoMACEiE. Calyx persistent, adherent to the ovary, the carpels of which are 

 united, at least in the ripe fruit. Genera :—1i. Pteus ; 15. Hawihoen; 16. CoTO- 



lEASTEE ; 17. MeDLAE. 



The double-flowering Kerria japonica, so frequently to be met with trained upon 

 cottage garden-walls, formerly supposed to be a species of Corchorus, is now known to 

 belong to the Rose family. 



I. PRUNUS. PRUNUS. 



, Shrubs or trees, with undivided, toothed leaves, and small, free stipules, 

 often scarcely visible ; the flowers either in small bunches on a former 

 year's wood, or in racemes in the axils of young leaves. Calyx free, 5- 

 lobed. Petals 5. Stamens numerous. Ovary of 1 carpel, containing 2 

 pendulous ovules. Pruit a fleshy or juicy drupe, with a hard stone, 

 smooth or rugged, but not wrinkled on the surface, containing 1, or rarely 

 2 seeds. 



A considerable genus, distributed over the whole of the northern hemi- 

 sphere, and even abundant within the tropics, both in the new and the old 

 world, but not extending into the south temperate zone. It is the only 

 British genus with a stone fruit. 



Flowers in axillary racemes 3. Sirdcheny F. 



Flowers soHtary or clustered, from leafless buds. 



Flowers single or two together, on short pedicels 1. Slackthorn P. 



Flowers in clusters, on pedicels longer than the flower itself ... 2. Cherry P. 



The well-known common Laurel and Portugal Laurel of our gardeners, 

 are species of Prunus {P. Lauro-cerasus and P. lusitanicus), and have no 



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