114 



KEY AND FLORA 



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



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



Waldsteinia, VIII 

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

 ening. Potentilla, IX 

 (/) 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 



A - B C 



Fig. 19. Pistils in the Rose Family 

 A, Prunus-tjpe; B, Potentilla-type; C, fiosa-type. o, calyx; o, ovary 



JRipe carpels inclosed toithin 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 



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



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



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



