116 Order GENTIANALES 
2. GENTIANACE., 
Gentian | Family. 
Leaves simple, opposite. 
Lobes of the corolla 4 times as long as the corolla-tube. 1. Eustoma. 
Lobes of the corolla shorter than the corolla-tube. 2. Gentiana. 
Leaves trifoliolate, alternate or basal. 3. Menyanthes. 
1. Eustoma. 731. 
1. Eustoma russellianum (Hook.) Griseb. 
In low meadows mostly along the Platte river. Alliance; Kearney; 
Lavaca; Memphis; Scotts Bluff county. 
2. Gentiana. 731. 
Corolla closed or nearly so, its lobes obsolete. 2. G. andrewsii. 
Corolla open, its lobes well developed. 
Leaves with rough margins, flowers blue. 1. G. puberula. 
Leaves with smooth margins, flowers white tinged with green or 
yellow. 3. G. flavida. 
1. Gentiana puberula Michx. Downy Gentian. 
On prairies, most common in the eastern part of the state. Crete; 
Lincoln; Simeon; Utica; Valentine; Weeping Water; Wood Lake. 
2: Cenuans andrewsii Griseb. Closed Gentian. 
In low meadows mostly in the sand-hill regions. Ainsworth; Kear- 
ney; Neligh; Newark; Plainview; Thedford; Valentine. 
3. Gentiana flavida A. Gray. Yellowish Gentian. 
Rare along the lower Missouri. Nemaha county. 
3. Menyanthes. 736. 
1. Menyanthes trifoliata L. Bog or Buck Bean. 
In marshes, not common. Kennedy; Simeon. 
3. APOCYNACEZ. 
Dogbane Family. 
1. Apocynum. 738. 
Calyx less than half as long as the corolla-tube; flowers over 5 mm. 
ong. £. 8 androsemifolium. 
Calyx about as long as the corolla-tube; flowers less than 5 mm. 
long. 
Leaves narrowed at the base, petioled. 2. A. cannabinum. 
Leaves of the main stem truncate or subcordate at the base, sub- 
sessile. 3. A. hypericifolium. 
(Se Apocynum androsemifolium L, Dogbane. 
Mostly in the northwestern part of the state. Belmont; Harrison; 
Weeping Water. 
2. Apecynum cannabinum L, Indian Hemp. 
Common throughout the state. Belmont; Cherry county; Dixon 
county; Kearney county; Lincoln; Natick; Red Cloud; Talmage; 
Wymore. 
3. Apocynum hypericifolium Ait. 
Common over the whole state. Grand Island; Lincoln; Riverton. 
