106 GENTIANALES 



Stems purple, flowers rarely white, prickles at base of capsule as 

 long as those near the top. 2. D. tatula. 



1. Datura stramonium L. Jimson Weed. 



Introduced and rather common in the eastern part of the state. Grand 

 Island; Lincoln; Minden; Peru; Tecumseh; Weeping Water. 



2. Datura tatula L. 



Introduced but not common. Riverton; Thedford; Valentine. 



GENTIANALES. 



Trees with odd-pinnate leaves. 1. Oleaceae. 



Herbs with simple leaves. 



Carpels united into a 1-celled ovary, juice not milky 



2. Gentianaceae. 

 Carpels 2, separate or nearly so, juice milky. 



Without a crown between the corolla and the stamens. 



3. Apocynaceae. 

 With a 5-lobed or 5-parted crown between the corolla and the 



stamens. 4. Asclepiadaceae. 



1. OLEACEAE. 



Fraxinus. 724. 



Wing of the samara not decurrent on the body. 1. F. americana. 



Wing of the samara decurrent on the body for half its length or more. 



2. F. campestris. 



1. Fraxinus americana L. White Ash. 



Along streams in the southeastern part of the state. Nemaha; Sarpy 

 County. 



2. Fraxinus campestris Britton. Field Ash. 

 Fraxinus lanceolata Borck. 



Common along streams throughout the state. Franklin; Lincoln; 

 Long Pine; Nemaha; Plummer Ford; South Bend. 



2. GENTIANACEAE. 



Leavese 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 trifoliate, alternate or basal. 3. Menyanthes. 



1. Eustoma. 731. 



1. Eustoma russellianum (L.) 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, calyx lobes linear-lanceolate, as long as 

 the tube, rough. 1. G. puberula. 



