Spring Flora of Oklahoma 
63 
leaves alternate, odd-pinnate. Stipules adnate to the 
petiole. Flowers corymbose or solitary, red, pink, or white. 
Calyx tube cup-shaped or urn-shaped, constricted at 
the throat, becoming fleshy in fruit, usually 5-lobed. 
Petals 5, spreading. Stamens many, inserted around the 
inside of the mouth of the calyx tube. Ovaries many, 
hairy, ripening into bony achenes, enclosed in a rather 
fleshy calyx tube. 
Sepals persistent. 1. R. Arkansana. 
Sepals deciduous. 
Leaflets 7-11; calyx tube hispid. 2. R. foliosa. 
Leaflets 5-7; calyx tube glandular-pubescent. 
3. R. virginiana. 
1. Rosa Arkansana Porter. A branching shrub 12'-24' tall. 
Stems and branches more or less densely armed with bristle-like 
prickles. Leaflets 7-11, the blades oval, obovate or cuneate, rounded at 
the apex, simply serrate, sometimes tomentose beneath. Flowers in 
terminal corymbs. Calyx tube glaucous. Sepals lanceolate, acu¬ 
minate, glandular without, tomentose within, persistent. Corolla 
iy 2 '-2' broad. Styles distinct. Fruit sub-globose, red, glabrous. 
Prairies. Spring and summer. 
2. Rosa foliosa Nutt. A branching shrub about 3° tall. Stems 
and branches armed with straight or slightly curved prickles. Leaf¬ 
lets 7-11, the blades firm, usually acute, serrate, glabrous or nearly 
so. Flowers solitary or a few in corymbs. Calyx tube hispid. Se¬ 
pals lanceolate, acuminate, glandular-pubescent, often lobed, decid¬ 
uous. Corolla l'-iy 2 broad. Styles distinct. Fruit sub-globose, 
red, glabrous. 
On prairies. Spring and summer. 
3. Rosa virginiana Mill. Low or Pasture Rose. Bushy, 6'-0° 
high, armed with infra-stipular spines and prickles. Stipules entire. 
Leaflets 5-7, thin ovate-oval or obovate, coarsely and simply serrate, 
mostly acute at both ends. Flowers few or solitary, 2'-3' broad. 
Pedicels and calyx usually glandular. Pod glandular-hispid, about 
4" high. 
In dry soil. May-July. Common. 
FAMILY 35. AMYGDALACEiE. Peach Family. 
Trees or shrubs with alternate, petiolate, simple, most- 
