Limnosciadium pinnatum
tansy dogshade
Family
Apiaceae
Leaf Arrangement
alternate, basal (rosulate)
Leaf Margin
entire
Leaf Type
compound, dissected
Growth Form
forb
Flower Color
white
Flower Petals
5
Flower Month
May - June
Height (meters)
0.1 - 0.8
Milky Sap
No
Armed/Unarmed
Unarmed
Origin
native
Lifespan
annual
Growing Season
Cool season
Wetland Class
FACW
Wetland Coefficient of Conservatism
3
Prairie Coefficient of Conservatism
3
Field Characters
Larger and more erect than Limnoscadium. pumilum, growing up to nearly 8 dm with larger leaves (8 cm long by 2.5 wide), while L. pumilum is low and diffuse growing to only 4 dm tall with smaller leaves (3" long by 1/4" wide). The fruit of L. pinnatum is oblong-oval, while L. pumilum has oval to orbicular fruit.
Natural History
Found in wet places in the northeast and southwest parishes of Louisiana and the eastern half of Texas.
Habitat
Low wet places, along roadsides, and marshes.