Red bluet (Houstonia rubra)
Description
Houstonia rubra, the red bluet, is a plant species in the Rubiaceae. It is a small herb with red to reddish-purple flowers, native to the southwestern United States and northern and central Mexico: Coahuila, Nuevo Le-n, Hidalgo, Zacatecas, Guanajuato, Puebla, Sonora, Durango, Chihuahua, Arizona, New Mexico, southeastern Utah and western Texas.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum: Magnoliophyta
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Class: Magnoliopsida
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Order: Gentianales
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Family: Rubiaceae
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Genus: Houstonia
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