Vascular Plants of the Gila Wilderness
Presented in Association with the
Western New Mexico University Department
of Natural Sciences
Houstonia rubra Cav.
(Red Bluets)
Family: Rubiaceae
Status: Native
Synonyms:
Hedyotis rubra (Cav.) A.Gray
Oldenlandia rubra (Cav.) A. Gray
Houstonia rubra is a low herb with distinctive red, pink or white 4-petaled flowers. It is similar
to the more common Houstonia wrightii in our area, but the floral tube of Houstonia rubra is much
longer (2-3x the length of the petals) than that of Houstonia wrightii (about the same length as the petals or a little longer). The leaves of H. rubra are mostly upright and parallel while those of H. wrightii are spreading. H. rubra is most often found in lower elevation arid areas.
Please click on an image for a larger file.

Houstonia rubra, photo Radha Veach, Grant County, Airport Road, July 3, 2024

Houstonia rubra, long corollas and whitish color variant, photo Radha Veach, Grant County, Airport Road, May 8, 2024

Houstonia rubra, long corollas and whitish color variant, photo Radha Veach, Grant County, Airport Road, May 8, 2024

Houstonia rubra, long corollas and red/pink color variant, photo Radha Veach, Grant County, Airport Road, May 8, 2024

Houstonia rubra, long corolla, photo Radha Veach, Grant County, Airport Road, May 8, 2024
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