62 
Spring Flora of Oklahoma 
Carpels enclosed in the fleshy calyx-tube. 
III. Rosa. 
I. FRAG ARIA (Tourn.) L. 
Perennial scape bearing herbs propagating by runners. 
Leaves with 3 leaflets. Stipules united to the petiole. 
Flowers white. Calyx hypogynous, 5-parted, 5-bracted, 
persistent. Petals 5. Stamens many. Carpels many on 
a convex receptacle. Achenes of the ripe strawberry 
many, very small, more or less imbedded in the large, 
sweet, pulpy receptacle. 
1. Fragaria americaiia (Porter) Britton. American Wood 
Strawberry. Slender, light green, loosely villous-pubescent or glab- 
rate, usually producing runners. Leaflets ovate or oval, obtuse or 
acute at the apex, sharply incised-dentate, the terminal commonly 
cuneate, the others inequilateral at the base, pubescent with silvery- 
appressed hairs beneath. Fruit ovoid or elongated-conic, light red 
or pink. 
In rocky woods. May-June. 
II. RUBUS (Tourn.) L. 
Mostly prickly shrubs or trailing vines, with alternate, 
simple, lobed or 3-7-foliate leaves, the stipule adnate to 
the petiole. Flowers in terminal and axillary clusters, 
rarely solitary, white. Calyx hypogynous with a broad 
tube; its lobes 5, persistent. Petals 5. Stamens many. 
Carpels many, distinct on a convex receptacle. Fruit a 
cluster of little 1-seeded drupes on a dry or somewhat 
juicy receptacle. 
1. Rubus procumbent Mugl. Dewberry. Trailing, shrubby, 
armed with scattered prickles. Branches erect or ascending, more 
or less pubescent, somewhat prickly. Leaves petioled, 3-7-foliolate. 
Leaflets ovate, oval or ovate-lanceolate, acute or sometimes acutish i 
at the apex, rounded or narrowed at the base, sharply dentate-ser¬ 
rate. Peduncles leafy. Fruit black, delicious. 
In dry soil. April-May. Common. 
III. ROSA (Tourn.) L. 
Erect or climbing shrubs. Stem commonly prickly, 
