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Houstonia longifolia

Houstonia longifolia

Houstonia longifolia, commonly known as long-leaved bluet or longleaf summer bluet, is a perennial plant in the family Rubiaceae.[2] It can be found throughout most of the Eastern United States and Canada. It has been reported from every state east of the Mississippi River except Delaware, plus North Dakota, Minnesota, Missouri, Arkansas and Oklahoma, with isolated populations in Kansas and Texas. Also, all Canadian provinces from Quebec to Alberta.[1][3] It prefers upland woods in poor, dry, often sandy soil, blooming from June to August.[4]

Houstonia longifolia
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Gentianales
Family: Rubiaceae
Genus: Houstonia
H. longifolia
Binomial name
Houstonia longifolia
  • Hedyotis longifolia (Gaertn.) Hook
  • Oldenlandia purpurea var. longifolia (Gaertn.) A.Gray
  • Houstonia purpurea var. longifolia (Gaertn.) A.Gray
  • Chamisme longifolia (Gaertn.) Nieuwl.
  • Hedyotis purpurea var. longifolia (Gaertn.) Fosberg


Two varieties are recognized:[1]


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