Rubiaceae

Needleleaf bluet

Houstonia acerosa (A.Gray) Benth. & Hook.f.

Family: Rubiaceae
Genus: Houstonia

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Needleleaf bluet (Houstonia acerosa) — FlowerPhoto: Michelle W. （鍾偉瑋）, CC BY 4.0, from iNaturalist

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Common names

By language (1)

English: Needleleaf bluet

Synonyms

Ereicoctis acerosa (A.Gray) Kuntze
Hedyotis acerosa A.Gray
Mallostoma acerosum (A.Gray) Hemsl.
Oldenlandia acerosa (A.Gray) A.Gray

Characteristics

Growth habit: Forb/herb, Subshrub
Lifespan: Perennial
In the US and Canada: Lower 48 states: native

Photos

FlowerPhoto: Michelle W. （鍾偉瑋）, CC BY 4.0, from iNaturalist
FlowerPhoto: Catherine C. Galley, CC BY 4.0, from iNaturalist
FlowerPhoto: Michelle W. （鍾偉瑋）, CC BY 4.0, from iNaturalist
FlowerPhoto: Michelle W. （鍾偉瑋）, CC BY 4.0, from iNaturalist
Photo: Patrick Alexander from Las Cruces, NM, CC0, from Wikimedia Commons
Photo: Patrick Alexander from Las Cruces, NM, CC0, from Wikimedia Commons
Photo: Patrick Alexander from Las Cruces, NM, CC0, from Wikimedia Commons
Photo: CK2AZ, CC BY 4.0, from iNaturalist
Photo: Patrick Alexander from Las Cruces, NM, CC0, from Wikimedia Commons
Photo: CK2AZ, CC BY 4.0, from iNaturalist
Photo: Patrick Alexander from Las Cruces, NM, CC0, from Wikimedia Commons
Photo: Annika Lindqvist, CC BY 4.0, from iNaturalist

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Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.