{"slug":"styphnolobium-affine","scientific_name":"Styphnolobium affine","common_names":["Eve's necklace","Texas sophora","Pink sophora","Necklace tree"],"family":"Fabaceae","type":"broadleaf_deciduous","mature_height_m":6,"mature_spread_m":4,"growth_rate":"medium","lifespan_years":null,"hardiness_zones":[7,9],"sun":"full_partial","water":"low","soil":"Well-drained sand, loam, clay or limestone soils; turns yellow in poorly drained ground","native_range":"North-central and central Texas into Oklahoma, Arkansas and Louisiana","description":"A small, graceful native tree (15-20 feet) with fragrant pink pea-flowers hanging in clusters in spring, followed by black bead-like pods that look like a string of beads and persist into winter. Formerly called Sophora affinis. Tolerant of heat and drought and good for small yards, though the seeds are poisonous.","care":"Plant in a well-drained spot with full sun for best bloom; weekly water the first two summers, little afterward. Prune low branches where you need clearance. No serious pests. Keep pods away from small children and pets.","benefits":["flowers","pollinators","drought_tolerant","small_space","wildlife"],"uses":["small_yard","street_tree"],"cautions":["toxic_parts","short_lived"],"image_url":"https://upload.wikimedia.org/wikipedia/commons/b/be/Styphnolobium_affine.jpg","image_credit":"Jen, CC0, via Wikimedia Commons","sources":["https://plants.usda.gov/plant-profile/STAF4","https://www.wildflower.org/plants/result.php?id_plant=STAF4","https://plants.ces.ncsu.edu/plants/styphnolobium-affine/","https://www.austintexas.gov/watershed-protection/plant-guide/eves-necklace","https://www.treefolks.org/wp-content/uploads/2026/02/NeighborWoodsTreeMenu-2026.pdf"],"data_note":null,"updated_at":"2026-11-08T01:00:46.205Z","page_url":"https://treerm.org/trees/styphnolobium-affine","markdown_url":"https://treerm.org/trees/styphnolobium-affine.md","regions":[{"country":"US","region":"AR","locality":null,"status":"native","note":null,"source_url":"https://plants.usda.gov/plant-profile/STAF4"},{"country":"US","region":"LA","locality":null,"status":"native","note":null,"source_url":"https://plants.usda.gov/plant-profile/STAF4"},{"country":"US","region":"OK","locality":null,"status":"native","note":null,"source_url":"https://plants.usda.gov/plant-profile/STAF4"},{"country":"US","region":"TX","locality":null,"status":"native","note":null,"source_url":"https://plants.usda.gov/plant-profile/STAF4"},{"country":"US","region":"TX","locality":"Austin","status":"recommended","note":"On the City of Austin Grow Green native and adapted plant list (Watershed Protection). Listed as 'Eve's Necklace', a small understory tree with very low water needs; seeds are poisonous.","source_url":"https://www.austintexas.gov/watershed-protection/plant-guide/eves-necklace"},{"country":"US","region":"TX","locality":"Dallas","status":"recommended","note":"On the City of Dallas Article X Approved Tree List","source_url":"https://dallas.gov/departments/sustainabledevelopment/buildinginspection/DCH%20documents/pdf/BI_Approved%20Tree%20List.pdf"}],"license":"CC-BY-4.0"}