Houstonia rubra, the red bluet, is a plant species in the Rubiaceae.[2] It is a small herb with red to reddish-purple flowers, native to the southwestern United States and northern and central Mexico: Coahuila, Nuevo León, Hidalgo, Zacatecas, Guanajuato, Puebla, Sonora, Durango, Chihuahua, Arizona, New Mexico, southeastern Utah and western Texas.[1][3][4][5]
| Houstonia rubra | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Gentianales |
| Family: | Rubiaceae |
| Genus: | Houstonia |
| Species: | H. rubra |
| Binomial name | |
| Houstonia rubra Cav. | |
| Synonyms[1] | |
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| Taxon identifiers |
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