Twoleaf senna, Two leaved senna
Fabaceae (Pea Family)
Flaigg, Norman G.
This attractive perennial
maintains a neat mound shape and grows 1-2 ft. tall. Its showy, yellow, pea-like flowers occur in upper axillary
clusters. The leaves are long-stalked and uniquely divided into two leaflets about 1 1/2 inches long.
Named for Ferdinand Roemer, a German geologist who collected specimens in the New Braunfels, Texas, area from 1845-47.
Image Gallery: 34 photo(s) available
Plant CharacteristicsDuration: Perennial Habit: Shrub Fruit: Size Class:
Bloom InformationBloom Color: Yellow
Bloom Time: Aug , Sep , Oct
, TX Native Distribution:
S. & w. TX, NM
& n. Mex Native Habitat:
Fields; open woods, Common in fields, and open woods of central and west Texas. Well-drained limestone soils.
Growing ConditionsWater Use: Low
Light Requirement: Part Shade
Soil Moisture: Dry
Cold Tolerant: yes
Heat Tolerant: yes
Soil Description: Dry, caliche or clay soils.
Seeds provide an important source of food for birds. Warning:
Plants of this genus
(and herbal remedies derived from them) can cause poisoning and fatal illness in humans. Sensitivity to a toxin varies with a personís age, weight, physical condition, and individual susceptibility. Children are most vulnerable because of their curiosity and small size. Toxicity can vary in a plant according to season, the plantís different parts, and its stage of growth; and plants can absorb toxic substances, such as herbicides, pesticides, and pollutants from the water, air, and soil. Conspicuous Flowers:
Birds , Butterflies Larval Host:
Various Sulphur butterflies Nectar Source: