XLVni. RO.SACEi^. 239 



A larjje proportion of these are natives of temperate climalew north of the equator. 



Properties— \ hiphly important order, whether we KgiuA iu deliciouH fruit, iu medicinal producti«,or 

 the beauty of its flowers. None of iln species (exeeptinir those of the Almond tnbe) are unwliolesome. 

 An aHtrmeent principle chiinicfcrizes the family, residnit; chiifly in the h.trk and the rooL-t. I he ro<jtit ol 

 the blackberry have hc.-n used in ni.dirine as an a.-ftrinrcnt ; thos.- (if (.lii.'ina, iix an emetic ; Ajfrimo- 

 nia, as a vermifuKe. The peiuls ,.f ll..s.i damasc.-na, yield thr w. II known frauniiit oil, called oltar QT 

 rose. Tlie Almond, Peach, &c.. alK.uiid in pnissic acid, a dcaiily poison, r.si.ling chiefly in the kemeJa.— 

 Of the Rosacea), as ornaiueatal flowering shrubs, it is scarcely neccssjiry to speak. 



PIG. 44.— 1. Potentilla ar^uta, flower and leaf. 2. Vertical section of a flower with the petals removed, 

 showing the perigynous disk, stamens, ovaries, &c. 3. Enlarged ovary and style. 4. Mature ovary. 

 5. Section showint' the seed and funiculus. 6. Vertical section of a flower of Frasaria, showing the peri- 

 grnous stamens, the ovaries, &c. 7. Enlarsed carpel. 8. Fruit, consistmff of the enlarsed receptacle 

 with the achenia external. 9. Perisynous sUimens of Rubus Idaeus. 10. Fruit, the fleshy carpels aggre- 

 pated. 11. .Section of the fruit. 12. Flower of the apple tree. 13. Vertical section of a rose, showing 

 the distinct carpels in the calyx tube. 



Conspectus of the Genera. 



\ Sta. 5. Sibhaldia. 24 



( Leaves < caiiline. f Sta. 00. PotentiUa. 12 



("not < comp.. ^ all radical. . WaMstemia. 16 



1 caudate, f Leaves simple. . . Dalibarda. 15 



("on a dry 1 and caudate with ^ Petals 8 or 9. Dnjas. 25 



J receptacle I the persistent style. ^Petals 5. . Geum. 17 



) on a juicy ^ which is sweet and eatable in . Fragaria, 14 



f Achenia (receptacle ^ but insipid in Comarum. 13 



I Compound fruit (116, 14, a) of many aggregate drupes. . Riibiis. 11 



< J Lvs. simple or pinnate. Sphra. 21 



1 <2— lOseeded ( Leaves trifoliate. . . Gillcnia. 22 



i3--50. LFoilicles n-seeded. Shrub with simple 1 vs. (Fls. double.) A>r;va. 23 



( globose. Fr. elab. not plane. Cerasiis. 1 



< < Fruit ?l;ilirous. Prtinut. 2 



( nucleus smooth, .... ( compr. ? Fruit lubescent. Armeniaca. 3 



1 only < ^ Fruit fleshy. . Persica. 4 



Fruit a drupe ; ( nucleus perforated and furrowed. \ Friiit dry. . AmygdaUs. 5 



2 1 ( Stamens 1—4. Lvs. palm. Alcheinilla. 26 

 5 I -J .^famens 1. Lvs. pinnate. Sansri/isorba. 13 



f<ti \ t Pet. 0. ' Stamens 20—30. 



g < Carpels 1—4. I Petals 5. Stamens 12—15. . 



•i; Lbut enclosed in its tubes. I Carpeh numerous. Petals 5—00. Sta. 00. 

 ( Pome with 1—5 1-seeded cells. 

 I Pome with 3—5 2seeded cells, 

 adherent to < Petals roundish. . . ( Pome with 5 many-seeded cells. . 

 6 I the caJy.\ tube. I Petals lance-obovate. Pom« with 5 ^.ouble cells. . 



21 



Porerhnn. 19 



Airrimonia. 20 



Bata. 10 



Ciat(Fgua. 6 



Pyriit. 7 



Ci/donia. 8 

 Amelanchier. 9 



