146 MYRTALES 



1. Epilobium lineare Muhl. 



In wet, swampy places. Big Sandy Creek; Hooker County; Red 

 Cloud; Thedford. 



2. Epilobium coloratum Muhl. 



In sandy marshes, mostly in the western part of the state. Belmont; 

 Mullen; Riverton; Spencer; Valentine; Weeping Water. 



3. Epilobium adenocaulon Haussk. 



In moist sandy ground mostly in the western part of the state. Belle- 

 vue; Ewing; Kennedy; Kimball; Long Pine; Minden; Mullen; bioux 

 County; Thedford; Valentine. 



5. Onagra. 657. 



Capsules 2.5-3 cm. long, abruptly narrowed at the tip; calyx lobes 



appendaged at the tip. 1. O. strigosa. 



Capsules 3-4 cm. long, gradually narrowed to the tip; calyx lobes 



appendaged below the tip. 2. O. oakesiana. 



1. Onagra strigosa Rydb. Common Evening-Primrose. 

 Onagra biennis canescens T. & G. 



Common throughout the state as a weed, mostly in sandy soil. Aten; 

 Atkinson; Deuel County; Lincoln; Mullen; Republican V alley. 



2. Onagra oakesiana (A. Gray.) Britton. 

 Nebraska according to Britton's Manual. 



6. Oenothera. 658. 



Decumbent or ascending, flowers axillary, leaves sinuate-dentate or 



pinnatifid. 1. CE. laciniata. 



Erect, flowers spicate, upper leaves remotely denticulate or nearly 



entire. 2. CE.rhombipetala. 



1. CEnothera laciniata Hill. 



Common especially in sandy soil over most of the state. Atkinson; 

 Central City; Deuel County; Fairbury; Hastings; Keya Paha; Long 

 Pine; Thedford. 



2. CEnothera rhombipetala Nutt. 



On prairies not very common. Kearney; Kennedy; Minden; Nio- 

 brara; Plummer Ford. 



7. Anogra. 658. 



Tips of the calyx lobes not free in the bud. 1. A. albicaulis. 



Tips of the calyx lobes free in the bud. 



Capsule linear-cylindric; throat of the calyx glabrous;. 



Calyx sparingly long-hairy, puberulent or glabrous, not strigose. 

 Leaves glabrous, 2. A. pallida. 



Leaves pubescent or strigose. 



Leaves linear, entire or nearly so, strigose beneath. 



3. A. nuttallii. 

 Leaves usually denticulate or lobed, pubescent on both sides. 



4. A. cinerea. 

 Calyx and calyx-tube densely grayish strigose; leaves cinerous. 



5. A. latifolia. 

 Capsule oblong, 8-20 mm, long; leaves deeply pinnatifid, 



6. A. coronopifolia. 



