Erythronium rostratum, the yellow trout lily, yellow fawnlily, beaked trout lily, or golden-star, is a plant species native to the south-central part of the United States (Kansas, Missouri, Oklahoma, Ohio, Texas, Alabama, Arkansas, Kentucky, Louisiana, and Tennessee).Kew World Checklist of Selected Plant FamiliesBiota of North America Project
Erythronium rostratum produces egg-shaped bulbs up to 20 mm long. Leaves are lanceolate, up to 20 cm long. Scape is up to 10 cm tall, bearing one yellow flower.Flora of North America v 26 p 162Wolf, Wolfgang. 1941. Castanea 6(2): 24–26, pl. 1.
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photo of herbarium specimen at Missouri Botanical Garden, Erythronium rostratum, collected in Missouri