BOTANY OF LA SALLE COUNTY. 81 



POIvYTAENlA. P. Generally smooth; leaves twice 



pinnate. 

 P. Nuttallii. Plant 2 to 3 ft.; flowers bright Y. 



Dry places. 



THASPIUM. P. Meadow Parsnip. Leaves ternately 

 divided, or the lower not with broad serrate or 

 toothed leaflets; flowers Y. or P., fruit roundish 

 instead of flat. 



T. aureum. Smooth; flowers deep Y. 1^4 to 2 ft. 

 T. " var. Atropurpureum. Flowers P. 

 PIMPINELLA. P. Differs from Thaspium in hav- 

 ing- entire leaflets and the fruit oblong-. 

 P. integ-g-errima. Slender, 1 to 3 ft., branching-, M. 

 CRYPTOTAENIA. P. Smooth, leaves thin, 3 



foliate. 



C. Canadensis. Plant 1 to 3 ft., leaflets larg-e, 

 ovate, acuminate, doubly serrate, often lobed. 

 Ju. Sept. 

 SIUM. P. Water Parsnip. Smooth, growing- in 



water or wet places. 



S. cicutaefolium. Stout, 2 to 6 ft., leaves pinnate, 

 3 to 8 pairs of linear, lanceolate, acuminate, 

 serrate leaflets, flowers small, white. 

 C1CUTA. Water Hemlock. Smooth, growing- in 



marshes. 



C. maculata. Spotted Cowbane. Musquash Root. 

 Beaver Poison. Stout, 2 to 5 ft. streaked with 

 P., leaves 2 to 3 pinnate, leaves on long- petioles; 

 leaflets long- narrow, serrate, acute, rather 

 distant and very small for so larg-e a plant; flow- 

 ers W. small. Root fleshy, W. A dang-erous 

 poison. 



CHAEROPHYL LUM. A. Leaves ternately com- 

 pound; leaflets with long- narrow lobes. 



