XLVIII. ROSACEA. 



239 



A large proportion of these are natives of temperate climates north of the equator. 



Properties— A. highly important order, whether we regard iU delicious fruit, its medicinal products, or 

 the beauty of its flowers. None of its species (e.vcepting those of the Almond tribe) are unwholesome. 

 An astnnpent principle characterizes the family, residing chiefly in the bark and the roots. The roqta of 

 the blackberry have been used in medicine as an astringent ; tho.se of Gillenia, as an emetic; Agnmo- 

 nia, as a vermifuge. The petals of Rosa damascena, yield the well known fragrant oil, called ottar of 

 rose. The Almond, Peach, &c., abound in prussic acid, a deadly poison, residing chiefly in the kernels. — 

 Of the Rosaces, as ornamental flowering shrubs, it is scarcely necessary to speak. 



FIG. 44.— 1. Potentilla arguta, flower and leaf 2. Vertical section of a flower with the petals removed, 

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

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

 (ryiiom stamens, (he ovaries, &c. 7. Enlarged carpel, s. Fruit, consisting of the enlarsed receptacle 

 with the achenia external. 9 Perigynous stamens of Rubus Ida;us. 10. Fruit, the fleshy carpels aggre- 

 '•''<d. 11. Section of the fruit. 12. Flower of the apple tree. 13. Vertical section of a rose, showing 

 ' distinct carpels in the calyx tube. 



Conspectiis of the GeTiera. 



< Sta. 5. FUbbaldia. 24 



( Leaves ( cauline. ( Sta. 00. Potentilla. 12 



("not < romp.. ^ all radical. . Waldstr.inia. 16 



1 caudate, i Leaves simple. . . Dalibarda. 



fonadry i and caudate with t Petals 8 or 9. Dnjas. 



I receptacle I the persistent style. H'etals 5. . Geum. 



j on a juicy ^ which is sweet and eatable in . Fra^aria, 



("Achenia C receptacle ^ but insipid in Coniarum. 



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



< 4Lvs. 8im|)le orpmnate. Spirea. 



<2— lO-seeded ? Leaves trifoliate. . . Gillrnia. 



3--60. iFollicles n-seeded. Shrub withsimipli; Ivs. (FIs. double.) Kfrrla. 

 i globose. Fr. clnb not glauc. r^ra,v»j». 



i \ Fruit glabmua. Prutiun. 



( nucleus smooth ( compr. ? Fruit puln'sccnt. Armmiara. 



1 only < < Fruit fleshy. . Pernica. 



.Fruitadrupe;( nucleus perforated and furrowedd Fruit dry. . Awvs'dalis. .'> 



( Stamens 1-4. Lvs. palm. Alchf,nilla. 2<5 



<. stamens 4. Lvs. pinnate. Sang-iii.wrlia in 



\ J'et n. ' stamens «>— 30. . . Pdrriiim. in 



SI i CtrpeU 1 -4. } Pcl.il>i r,. .stfimens 12—15. 



<£ Lbut enclosed in its tul)e«. f CuriieU numcmus. Petalu ,■> -co. Sta. 00, 



i Pome with 1 -.■> 1 Hcedcil cells. 



^ Pome with 3-5 2seeded cell*. 



adhrr)>nt to i Petal.<i roundish. . . ( P«)me with 5 many seeded cells. , 



I the calyx tube. J PctaUi lance olwvate. Poin« with 5 Jouble cclbi. . 



21 



"§ r naked, 



.1 



Airrtmonia. 



Ri»a. 



("radrirtu. 



P>frn.f 



Ci/donia 



Amelauchirr. 



