According to a March 2023 extract of the Florida Plant Rescue Database, Fairchild Tropical Botanic Garden holds 5 accessions of Chamaecrista lineata var. keyensis totalling approximately 9752 seeds representing 137 maternal lines.
Endemic to the Florida Keys, where currently known only from Big Pine Key in Monroe County, Florida. Threatened by habitat alteration, altered fire regime, development and non-native plants. The habitat of Chamaecrista lineata var. keyensis is very uncommon; these plants occur only on the edges of rockland hammocks and pinelands in the pine rocklands. Given its narrow habitat range, and the small number of individuals that occur, Chamaecrista lineata var. keyensis is vulnerable to extinction if these threats continue.
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