Family ARACEA 25 
Spike fleshy, i. e. a spadix; flowers not accompanied by bristles; 
fruit a berry. 1. Aracez. 
Spike not fleshy; flowers accompanied by bristles; fruit not a 
berry. 3. Typhacee. 
Flowers in globular heads. 2. Sparganiacez. 
Plants reduced to leaf-like structures called thalli. 4. Lemnacee. 
1. ARACEZ. 
Arum Family. 
Spathe surrounding the spadix; flowers monecious or diccious, 
leaves compound. 1. Arisaema. 
Spathe leaf-like not enclosing the spadix; flowers perfect, leaves 
simple. 2. Acorus. 
1. Ariszeema. 229. 
Leaves with three segments. 1. A. triphyllum. 
Leaves with more than three segments. 2. A. dracontium. 
1. Arisema triphyllum (L.) Torr. Jack-in-the-pulpit, Indian Turnip. 
Moist places in woods in the eastern part of state. Crete; Fremont; 
Lincoln; Milford; Weeping Water. 
2. Arisema dracontium (L.) Schott. Dragon-root. 
In similar places as last, but less common. Crete; Saltillo; Weeping 
Water. 
2. Acorus. 231. 
1. Acorus calamus L. Calamus, Sweet Flag. 
In swampy places in the southeast part of the state. Lincoln; Ne- 
braska City; Platte River west of Fremont. 
2. SPARGANIACEZ. 
1. Sparganium. 39. 
1. Sparganium eurycarpum Engelm. . Bur-reed. 
Common in wet places and in shallow water. Anselmo; Belmont; 
Cherry county; Cedar county; Kearney; Lincoln; Peru; Thedford; 
Valentine. 
3. TYPHACEZ. 
1. Typha. 38. 
1. Typha latifolia L. Common Cat-tail. 
Common along streams, ditches and in wet ground. Alliance; An- 
selmo; Belmont; Lincoln; Norway; Peru; Thedford; Wahoo. 
‘ 4. LEMNACEZ. 
Duckweed Family. 
Rootlets several. 1. Spirodela. 
Rootlets nct more than one. 
Rootlets usually present; thallus over one mm. long. 2. Lemna. 
Rootlaets wanting; thallus less than one mm. long. 3. Wolffia. 
