152 SUMMER FLOWERS. 



ftt Leaves pinnate, without tendrils. 

 J Pod bursting, imperfectly two-celled. 



(78) Astragalus calyx five-toothed ; keel obtuse ; pods imper- 



fectly two-celled, the cells formed by the inflexed margin 

 of the lower suture. 



(79) Oxytropis calyx five-toothed ; keel with a narrow straight 



point ; pod imperfectly two-celled, the cells formed by the 

 inflexed margin of the upper suture. 



J* Pod indehiscent. 



(80) Onobrychis calyx five-toothed, nearly equal ; keel obliquely 



truncate longer than the wings; pod compressed, one- 

 celled, one-seeded. 



20. Rosaceous Plants. ROSACES. 



* Petals four Jive or more. 



t Fruit consisting of one or more follicles, containing 2-6 

 seeds, and invested by a dry calyx. 



(81) Spiraea calyx five-cleft ; stamens numerous, inserted along 



with the petals on a disk adhering to the calyx ; follicles 

 usually distinct. 



ft Fruit composed of numerous (rarely 1-2) small nuts or 

 drupes (one-seeded) invested by a dry calyx. 



J Fruit and receptacle both dry. 

 Calyx with external bracts, i.e. in two rows. 



(82) Potentilla calyx 8-10-parted, in two rows ; stamens nume- 



rous ; styles withering ; fruits numerous, placed upon a 

 flattish receptacle. 



(83) Sibbaldia calyx ten-parted, in two rows; stamens five; 



styles withering ; fruits five to ten. 



(84) Geum calyx ten-cleft, in two rows ; stamens numerous ; 



fruits numerous, tipped with the persistent jointed styles, 

 hooked at the joint. 



