Family CERATOPHYLLACEAs 67 
stroyed by cattle in most places. Cherry county; Grant county; 
Kennedy; south of Whitman. 
2. Castalia. 407. 
1. Castalia tuberosa (Paine) Greene White Water-lily. 
In ponds in the eastern part of the state, but rapidly disappearing, 
due to tramping by cattle. Nemaha county; Richardson county. 
3. Nelumbo. 408. 
1. Nelumbo lutea (Willd.) Pers. Big Yellow Water-lily. 
In ponds along the Missouri and Platte rivers. Sharing the same 
fate as the last. Near Ames; Fremont; Nemaha. 
5. CERATOPHYLLACE2. 
1. Ceratophyllum. 408. 
1. Ceratophyllum demersum L. Hornwort. 
Common in streams, ponds and lakes. Callaway; Grant county; 
Newark. 
6. ANONACEZ. 
1. Asimina. 410. 
1. Asimina triloba (L.) Dunal. American Pawpaw. 
Along the Missouri in the southeastern part of the state. Nebraska 
City; Nemaha; Peru; Richardson county; Talmage. 
RHODALES. (PAPAVERALES.) 
Flowers quite irregular, some of the petals spurred. 2. Fumariacez. 
Flowers regular or nearly so. 
Juice milky, yellow or red, sepals falling off when the flowers 
open. 1. Papaveracee. 
Juice not colored, sepals persistent. 
Capsule 1-celled, stamens 6-many, not tetradynamous. 
3. Capparidacee. 
Capsule 2-celled, stamens usually 6, tetradynamous, rarely only 2. 
4. Crucifere. 
1. PAPAVERACE2. 
Poppy Family. 
Sap yellow; leaves spiny, not all basal. 1. Argemone. 
Sap red; leaves all basal, not spiny. 2. Sanguinaria. 
1. Argemone. 439. 
1. Argemone intermedia Sweet. Prickly or Thistle Poppy. 
Common in the western part of the state. Alliance; Box Butte 
county; Deuel county; Long Pine; Niobrara; Oxford; Sheridan 
county; Thedford; Valentine. 
2. Sanguinaria. 439. 
1. Sanguinaria canadensis L. Blood-root. 
Rare in woods along the Missouri river. Bellevue; Ponca. 
