114 



KEY AND FLORA 



(c) Carpels 5-15 (usually 10), 1-seeded. Filipendula, X 



(d) Akenes 2-6, styles not lengthening after flowering. 



Waldsteinia, VIII 



(e) Akenes many, on a dry receptacle. Styles not length- 



ening. Potentilla, IX 



(y) Akenes many, on a dry receptacle. Styles lengthening 

 after flowering, forming tails to the akenes. 



Geum., XI 

 2. Fruit fleshy. 



(a) Akenes several-many, becoming little drupes 



Rubus, XII 



(ft) Akenes many, dry on ripening, on a fleshy, eatable 



receptacle. Fragaria, VII 



(c) Pistil solitary, becoming a drupe Prunus, XIV 



(.-o 



ABC 



FIG. 19. Pistils in the Rose Family 

 A, Prwrcws-type; B, Potentate-type; C, .Rosa-type, c, calyx; o, ovary 



B 



Ripe carpels inclosed within the calyx tube. 



1. Fruit a pome. 



(a) Carpels more than 2-seeded ; seeds covered with a muci- 

 laginous pulp. Fruit 5-celled. Cydonia, III 

 (6) Carpels 2-seeded (except in some cultivated varieties); 

 seeds without pulp. Fruit 5-celled. Pyrus, IV 

 (c) Carpels 2-seeded ; fruit 10-celled. Amelanchier, V 



