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False indigo-bush is a 6-10 ft., loose, airy shrub which often forms dense thickets. Plants develop a leggy character with the majority of their pinnately compound, fine-textured foliage on the upper third of the plant. Leaflets velvety on the lower surface, margins frequently almost parallel, often abruptly rounded at both ends and with a notch at the tip. Flowers small, purple to dark blue with yellow stamens extending beyond the single petal, crowded in narrow, 3-6 in., spikelike clusters at or near the ends of the branchlets, appearing from April to June. Fruit small, up to 3/8 inch long and with blisterlike glands visible under a 10x hand lens. This is a deciduous plant.
This shrub, which often forms thickets on riverbanks and islands, is occasionally cultivated in the northeast. Another False Indigo (A. herbacea) has whitish to blue-violet flowers in fan-like masses on top of the plant and gray-downy foliage with up to 40 leaflets. The genus name, from the Greek amorphos (formless or deformed), alludes to the fact that the flower, with only a single petal (the banner or standard), is unlike the typical pea flowers of the family.
View herbarium specimen from Harry T. Cliffe Bexar Regional Herbarium.
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Hoary Edge (Achalarus lyciades) Larval Host |
Find seed sources for this species at the Native Seed Network.
View propagation protocol from Native Plants Network.
Question: We live in upstate new york( zone 5) with full sun and clay soil. What flowers/flowering shrubs would be successful in this environment?
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Question: Hello, we live west of Ft Worth. We are looking for tall plants to form a visual screen along a chain link fence we share with a neighbor. We have post oaks there and it is very shady and the ground is sandy and sloping. Our neighbor has planted eleagnus along her side but it is only a few feet tall. The fence line is about 100 feet long and we would like a variety of native plants 6 to 10 foot tall. Can you suggest anything?
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