164 RUBIALES 



Leaves opposite with large foliaceaus stipules making them appear 

 verticillate. 3. Galium. 



1. Houstonia. 860. 



1. Houstonia angustifolia Michx. 



In dry soil in the southeastern part of the state. Beatrice; Bellevue; 



Franklin; Indianola; Odell; Red Cloud; Wymore. 



2. Cephalanthus. 682. 



1. Cephalanthus occidentalis L. Button-bush. 



In wet soil along streams in the southeastern part of the state. Au- 

 burn; Cedar Creek; West Point. 



3. Galium. 864. 



Fruits bristly. 



Leaves and stipules 6-8 in each whorl. 



Stems retrorsely hispid on the angles, fruits 4-6 mm. broad. 



1. G. aparine. 



Stems nearly smooth, fruits 3-4 mm. broad. 4. G. triflorum. 



Leaves 4 in each whorl. 



Leaves broad, 8-6 mm. wide, fruit 4 mm. wide. 2. G. circaezans. 



Leaves lanceolate, 2-6 mm. wide, fruit 2 mm. wide. 3. G. boreale. 



Fruits smooth. 



Leaves 4 in each whorl. 



Stems nearly glabrous, leaves 12-25 mm. long. 5. G. tinctorum. 



Stems rough, leaves 5-15 mm. long. 6. G. trifidum. 



Leaves 6 in each whorl. 7. G. concinnum. 



1. Galium aparine L. 



A common weed in woods and waste places throughout the state. 

 Endicott; Pauline; Sioux County; ,.Thedford; Valentine. 



2. Galium circaezans Michx. 



In eastern part of the state. Grand Island; Lincoln; Nemaha; 

 Paddock. 



3. Galium boreale L. 



In the western part of the state often in dry rock soil. Belmont; Har* 

 rison; Pine Ridge; -Pumpkin Seed Valley; Wild Cat :Mountain. 



4. Galium triflorum ]\Iichx. 



In woods mostly in the eastern part of the state. Belmont; Endicott; 

 Mullen; Neligh; Ponca River; Wabash; Weeping Water. 



5. Galium tinctorum L. 



In woods and wet meadows in the southeastern part of the state. 

 Newark; Weeping Water. 



6. Galium trifidum L. Small Cleavers. 

 In shady woods and wet meadows over most of the state. Boelus; 

 Cherry County; Gage County; Plainview; Ponca; Red Cloud; Thed- 

 ford; Whitman. 



7. Galium concinnum Torr. & Gray. 



In woods in the southeastern part of the state. Nemaha; Weeping 

 Water. 



