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Rubiaceae
Houstonia

not marked as a favorite taxon Houstonia longifolia Gaertner var. longifolia. Common name: Eastern Longleaf Bluet. Phenology: Early Jun-Aug; Sep-Oct. Habitat: Dry rock outcrops and adjacent open woodlands, longleaf pine sandhills, dry sandy woodlands, dry roadbanks, glades and barrens. Distribution: Var. longifolia is centered in the central Appalachians of Virginia, West Virginia, e. Kentucky, and se. Ohio, with extensions north to Vermont, west into n. Illinois, and south in the Piedmont and adjacent Coastal Plain to South Carolina, Georgia, and Panhandle Florida.

Glossary (beta!)

Origin/Endemic status: Native

Taxonomy Comments: As explained by Haines (2025b), Terrell (1988) selected a neotype for Houstonia longifolia that represents this taxon, so the autonymic variety must become var. longifolia.

Synonymy ⓘ: = Haines (2025b); = Houstonia longifolia Gaertn. — Terrell (1996); = Houstonia longifolia Gaertn. var. compacta Terrell — WV, Terrell (1959); < Hedyotis longifolia (Gaertn.) Hook. — C, Rogers (1987); < Houstonia longifolia Gaertn. — F, Fl5, G, Il, K1, K4, NE, NY, Pa, RAB, S, Tn, Va, W, WH3; < Houstonia longifolia Gaertn. var. longifolia — Terrell (1991). Basionym: Houstonia longifolia Gaertn. 1788

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Heliophily ⓘ: 7

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image #1 of Houstonia longifolia var. longifolia© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
image #2 of Houstonia longifolia var. longifolia© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
image #3 of Houstonia longifolia var. longifolia© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
image #4 of Houstonia longifolia var. longifolia© Bruce Sorrie | Original Image ⭷

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Horticultural Information

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