Spring Flora of Oklahoma 
131 
ly-toothed, entire or none. Petals none or 2-4, separate, 
or united in pairs at the base. Stamens 2, inserted on the 
base of the petals or hypogynous. Ovules 2 in each cav¬ 
ity of the ovary, pendulous. Stigma 2-cleft. Fruit a flat 
samara, winged at the apex only or all around. Seed ob¬ 
long. 
Body of the samara terete or nearly so, the wing chiefly 
terminal. 
Wing almost entirely terminal; leaves pale beneath. 
1. F. americana. 
Wing manifestly extending down on the sides of the 
body. 2. F. pennsylvanica. 
Body of the samara flat, the wing extending all around it. 
Twigs terete; leaflets 5-7; samara elliptic or spatulate. 
3. F. caroliniana. 
Twigs 4-sided; leaflets 7-11; samara oblong or cuneate. 
4. F. quadrangulata. 
1. Fraxinus ameiricana L. White Asii. A large tree. Twigs 
and petioles smooth. Leaflets usually 7, ovate or ovate-lanceolate, 
taper-pointed at the apex, rounded or obtuse at the base, entire or 
slightly serrate, smooth above, often downy beneath, short-stalked. 
Flowers mostly dioecious. Key l%'-2' long, winged only at the 
apex. Wing spatulate or oblanceolate. 
In rich woods. April-June. Common. 
2. Fraxinus pennsylvanica Marsh. Red Ash. A small tree with 
rough, dark gray bark. Twigs and petioles densely velvety-downy. 
Leaflets 5-9, oblong-ovate or ovate-lanceolate, taper-pointed at the 
apex, narrowed into a short stalk at the base, finely serrate, smooth 
above, velvety downy beneath. Key l'-2' long, the wing somewhat 
extended along the sides. 
Moist soil. Comanche County. April-May. 
3. Fraxinus caroliniana Mill. Water Ash. A small tree. 
Twigs smooth or downy. Leaflets 5-7, ovate or elliptical, acute at 
the apex, acute or obtuse at the base, entire or slightly serrate, 
smooth or slightly downy. Flowers dioecious. Key often 3-angled 
or 3-winged, wings running nearly to the base, oblong or oval and 
pinnately veined. 
In swamps and wet soil. March-April. 
4. Fraxinus quadrangulata Michx. Blue Asii. A large forest 
tree with 4-sided twigs, the foliage glabrous, or sparingly pubescent 
when young. Leaflets 7-11, ovate, oblong, or lanceolate, acuminate 
