45 ROSACEJE. 



11. I*. Torreyi, Gr. Acute leaflets 6 lines long: purplish flowers solitary. 



14. CERCIS, Linnaeus. 

 0. occidentalis, Torr. Small standard enclosed by the wings: pods red. 



ROSACES. 



* Shrubs or Trees. 



a. Flowers white, 8 lines or more across: carpels 1-5, distinct. 



Carpel 1, becoming a drupe (like a cherry or plum) ' 1 



Carpels 5 (or often wanting), stamens 15: racemes drooping: cherry-like 2 



Carpels 2-5, becoming inflated, usually reddening: stamens 20 or more 7 



Carpels 5, hairy: leaves bipinnate, leaflets minute: panicles leafy 8 



Carpel 1, becoming an akene: low shrub: leaves tripinnate 9 



b. Flowers white, 2 lines broad or less, in dense panicles', carpels 1 to 12. 



Stamens 20 or more: flowers in plumose panicles: leaves large, lobed 6 



Stamens 10-15: evergreen leaves 2-4 lines long: panicles erect 18 



c. Flowers rose-color or pale purple, small: carpels 5, distinct 3 



d. Flowers 3 lines or more across: carpels 2-5, enclosed by thejleshy calyx-tube forming an 



inferior ovary (partly inferior in 24)* 



Evergreen leaves serrate: carpels 2: stamens 10: berries scarlet 24 



Deciduous leaves simple: flowers corymbose. 



Fruit red or yellow: 110 spines or thorns 25 



Fruit black or purple: spinose 26 



Deciduous leaves simple: flowers racemose: petals oblong 27 



e. Flowers 6 lines broad or more: stamens and carpels numerous: fruit like a blackberry or 



raspberry 10 



/. Flowers solitary, axillary, small: petals none: calyx white, the limb deciduous: carpel 1 



(rarely 2), long plumose tailed 11 



g. Flowers rose-colored an inch or more across: stamens many: ovary apparently inferior: 



stems slender, prickly: leaves pinnate . . 23 



* Herbs. 



a. Flowers 6 lines broad or more: akenes forming a berry 10 



6. Flowers very small (except 1 sp. in 3), white: calyx lobes 5 (no intermediate lobes or bract- 

 lets): stamens 20 or more: carpels 3-10. 



Leaves very large, tripinnate: spikes in large panicles 4 



Leaves twice or thrice 3-cleft: raceme short 5 



Leaves entire, rosulate, silky: scape low 3d sp. in 3 



Leaves 5-7-lobed with small basal leaflets: petals 2-3 lines long 4th sp. in 3 



