152 Order MYRTALES 
Flowers short peduncled, 12-16 mm. broad; petals large, bright yel- 
low. 2. L. alternifolia. 
1. Ludwigia polycarpa Short & Peter. False Loosestrife. 
In swampy places, mostly in the eastern part of the state. Ains- 
worth; Lincoln. 
2. Ludwigia alternifolia L. 
In swampy places in the southeastern part of the state. Endicott. 
3. Chameenerion. 655. 
1. Chamenerion angustifolium (L.) Scop. Fire-weed. 
In the northwestern part of the state, not abundant. 
4. Epilobium. 655. 
Willow-herbs. 
Leaves entire or nearly so, linear or linear-lanceolate. 1. E. lineare. 
Leaves serrate, lanceolate. 
Mature seeds with cinnamon-colored coma, beakless, 1-5 mm. long. 
2. E. coloratum. 
Mature seeds with white coma, short beaked, 1 mm. long. 
3. E. adenocaulon. 
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. Bel- 
mont; Mullen; Riverton; Spencer; Valentine; Weeping Water. 
3. Epilobium adenocaulon Haussk. 
In moist, sandy ground mostly in the western part of the state. 
Bellevue; Ewing; Kennedy; Kimball; Long Pine; Minden; Mullen; 
Sioux county; Thedford; Valentine. 
5. CEnothera. (Including Onagra.) 658. 
Ovules and seeds horizontal, angled; capsule tapering from a thick- 
ened base. 1. CE. biennis. 
Ovules and seeds ascending, not angled; capsule of nearly uniform 
diameter. 
Stems decumbent or ascending; flowers axillary; leaves sinuate- 
dentate or pinnatifid. 2. CE. laciniata. 
Stems erect; flowers spicate; upper leaves remotely denticulate or 
nearly entire. 3. CE. rhombipetala. 
1. (£nothera biennis L. Common Evening-primrose. 
Onagra biennis (L.) Scop. 
Common throughout the state as a weed, mostly in sandy soil. 
Aten; Atkinson; Deuel county; Lincoln; Mullen; Republican valley. 
2. CEnothera laciniata Hill. 
Common, especially in sandy soil over most of the state. Atkinson; 
Central City; Deuel county; Fairbury; Hastings; Keyapaha county; 
Long Pine; Thedford. 
3. CGEnothera rhombipetala Nutt. 
On prairies, not very common. Kearney; Kennedy; Minden; Nio- 
brara; Plummer Ford. 
