124 BOTANY OF LA SALLE -COUNTY. 



Order 117. PONTEDERIA CEAE. Pickeral-weed. 



Pontede ria corda ta. A water plant; fls. P. in a 

 spike. 



Heteranthera gramin ea. Mud-Plantain. 



Order 118. XYRIDA CEAE. Yellow-eyed-grass. 



Xy ris flexuosa? Seen several years since in a 

 swamp on Reddick farm. Believed to be ex- 

 tinct in that locality. 



Order 120. Commelynaceae. Spiderworts. 



Tradescan tia Virgin ica. Flowers B. Common. 



Order 121. JUNCA CEAE. Rushes. 



Jun cus effusus. Common Rush. Stems leafless. 



J. va seyii. Leaf 3^ at base. 



J. ten uis. Leaves flat or channelled. 



J. acumina tus. stems in tufts; leaves about 2. 



J. nodo sus. Leaves 2 or 3, recurved. 



J. nodo sus var.. meg-aceph alus. Stout. 



Lu zula verna lis. P. Leaves flat, hair\ 7 ; 6 to 9 in. 

 Woods. 



Order 122. TYPHA CEAE. Cat Tails. 



Typha latifo lia. P. Cat-tail. Marshes. 



Spartan ium. Bur-reed. Marshes. 



S. eurycar pum. Fruit hard, bur-like. 

 . Order 123. ARA CEAE- Arums. 



Arisae ma triphyl Ium. Indian Turnip. Leaves 2 

 each of 3 leaflets. 



A. Dracon tium. Leaf, one of 7 to 11 leaflets. 



Symplocar pus foetidus. Skunk cabbage. Strong- 

 scented. 

 i Order, 124. LEMNA CEAE. Duckweeds. 



Spirode la polyrrhi za. Small, floating-. 



Order 125. ALISMA CEAE. Water Plantains. 



Alisma plantag-o. Water Plantain. Pis. W. small. 



Sag-itta ria variab ilis. Arrowhead. Fls. W. larg-e. 



S. gramin ea. Leaves usually long--ovate. 



