Twinleaf senna, Twoleaf senna
Senna roemariana (Scheele) Irwin & Barneby
Fabaceae (Legume family)
Description
Twinleaf senna is an erect, perennial herb in the Legume family. The plant is green and covered with short, soft hairs which give it a grayis appearance. Twinleaf senna can have a few or many stems arising from a thickened root.
The leaves are arranged spirally as pairs of leaflets (hence the name twinleaf). The pairs of leaflets fold together during dry periods to conserve moisture.
Deep yellow flowers emerge from April to August; each has five petals that are about twice as long as the sepals, which are the usually green flower parts that surround and protect the bud. The flower stamens, or pollen-bearing organs, are straw-colored to light brown. A bean-type fruit develops after flowering.
This plant is poisonous to goats.
Habitat
Twinleaf senna is common in pastures and open woods on limestone soils in Central and West Texas and westward to New Mexico.
Images
Plant Characteristics
Flower Color: Yellow
Seed Type: Bean/Pod
Duration: Perennial
Stem Texture: Hairy
Growth Habit: Forbs/Broadleaf
Leaf Shape
: Pinnately Compound
Season: Warm
Distribution
: 04 - Blackland Prairies, 05 - Cross Timbers and Prairies, 06 - South Texas Plains, 07 - Edwards Plateau, 08 - Rolling Plains, 09 - High Plains, 10 - Trans-Pecos
Distributions
Distribution refers to the ecological region in Texas that a plant has been found. You can also view a clickable map.
Book: Brush and Weeds of Texas Rangelands (B-6208), Toxic Plants of Texas (B-6105)
Collection: Brush and Weeds, Wild Flowers
Livestock Affected: Cattle, Goats, Horses, Sheep
Livestock Signs: Abnormal Urination, Collapse, Depression/ Weakness, Diarrhea, Incoordination
