300 



ROSACEA. (rose family.) 



Fig. 154. 



(1) Plant of the Strawberry, with leaf, flower and fruit. (2) Half a flower, after the 

 petals have fallen, showing the stamens implanted in the calj'x, and the swollen torus on 

 the surface of which are the akenes. (3) One of the akenes, with lateral stjie attached 

 at base, (4) A fruiting twig of Rubus. (5) A fruit. (6) The same split lengthwise, show- 

 ing the long, central torus, and the drupe-like fruits. (7) A longitudinal section of one of 

 the drupelets. (8) Flowers of Sanguisorba. (9) Fruit of the same. 



5. GEUM Style persistent, (in ours) hirsute. Receptacle dry. Leaves incised-pinnate. 



6. FRAGARIA. Style caducous. Receptacle fleshy in fruit. Leaves trefoil. 



7. POTEN'J'ILLA, Style caducous. Receptacle dry in fruit. Leaves digitate, trefoil, or 

 pinnate. 



Tribe IV, POTERIE^. Calyx-tube urn-shaped with throat almost closed, con- 

 taining the free ovaries. Stamens various. Carpefs 1-3, l-OAOiled, Akenes dry, 



8. ALCHE3IILLA. Petals 0. Stamens 1-4 Calyx 8-parted. 



9. AGRIMONIA. Petals 5. Stamens 15. Calyx 5-fid. 



10. POTERIUiM, Flowers polygamous. Stamens 20 to 30. Calyx 4-fid. 



Tribe V. ROSEiE. Calyx urn-shaped. Stamens oo . Carpels oo , 1-ovuled, 'nut- 

 like, indehiscent, free, but enclosed in the fleshy, at length succulent calyx. 



11. ROSA. Prickly shrubs, leaves pinnate, and flowers showy white, red, or yellow. 



Fig. 155. 



(1), Fruit (hip) of a Rose, showing 

 the persistent calyx-lobes at apex. 

 (2), The same, divided lenghwise, 

 to show the akenes. implanted on 

 its inner surface, and ending in 

 long styles ; also the stamens im- 

 planted at the throat of the calyx. 

 See also (1) Fig. 156- 



