134 BOTANY OF LA SALLE COUNTY. 



B. al ba. White Mustard. Pods bristly; leaves all 

 deeply toothed. 



B. ni gra. Black Mustard, Pods 4-cornered; leaves 

 with a larg-e terminal or end lobe and smaller 

 lateral or side Y." Becoming- common in culti- 

 vated fields. 



Capsel la. Shepherd's Purse. 



Bur sa pastoris. Hoary green root leaves deeply 



toothed, stem leaves arrow-shaped; pod small, 



triang-ular; flowers W. small. An exceedingly 



common weed. 

 LEPID IUM. Peppergrass. 



Lt. Virgini cum. Pod roundish with a notch at top; 



upper leaves narrow, entire, lower deeplv 



toothed, all tapering- at base, W., 6 to 12 in. 



Common; grayish G. 



Order 11. CAPPAR1DA CEAE. Capers. 

 POL A NISI A graveo lens. Leaves 3 narrowly-oval 



leaflets, brig-lit green, sepals 4; plant hairy, 



clammy; flowers small, calyx P., petals Y. W. 



Has a strong- pung-ent smell. Gravelly, sandy 



places, along- streams; 8 to 18 in. Pods short 



and thick. 

 CLEO ME. Petals with claws, entire; pod long-, 



slender, many seeded; leaves 3 foliate. Fls. Rs. 



or W. 



C. integrifo lia. Calyx 4 cleft, petals with short 

 claws, leaflets narrowly lanceolate to oblong-; 2 

 to 3 ft. We saw a few specimens of this plant 

 S. W. of the C. B. &Q. depot, South Ottawa, 

 three or four years ag-o, have not seen it since. 



Order 13 CIST A CEAE. Rock Roses. 

 HELIANTHE MUM. Canadense, erect, leafy, leaves 

 long-, oval, nearly sessile, hairy, Y. Opening- 

 in the morning- and closing- g-enerally before 



