32 SPRING FLOWERS. 



11. Rosaceous Plants. ROSACES. 



* Petals four or Jive. 



t Fruit a solitary drupe ; (calyx deciduous) . 



(39) Primus ovary of one free carpel containing two ovules, 



becoming a succulent fruit enclosing a bard stone contain- 

 ing usually one seed. 



"H" Fruit consisting of numerous small nuts or drupes; 

 (calyx persistent) . 



(40) Pragaria fruit dry, on a succulent receptacle. 



(41) Potentilla fruit and receptacle botb dry. 



** Petals none. 



(42) Alchemilla calyx double, eight-parted tbe four outside 



divisions smaller ; stamens four or fewer. 



12. Pomaceous Plants. POMACES. 



* Calyx-segments large, foliaceous. 



(43) Mespilus petals large roundish ; fruit turbinate, with the 



upper ends of the carpels exposed ; disk dilated. 



** Calyx-segments small. 



(44) Cratsegus petals large roundish ; fruit round or oval, with 



1-5 bony 1-2-seeded cells or carpels. 



(45) Pyrus petals large roundish ; fruit fleshy, with five distinct 



cartilaginous 1-2-seeded cells. 



(46) Cotoneaster petals small erect; fruit turbinate, its cells 



forming distinct nuts cohering to the inside of the fleshy 

 calyx. 



13. Saxifragaceous Plants. SAXIFRAGACE.E. 



* Petals five. 



(47) Saxifraga stamens ten all antheriferous ; styles two ; ovary 



two-celled, superior or partially inferior. 



