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Rubiaceae
Houstonia
Houstonia
Genus of the Rubiaceae family with
35
species.
Houstonia micrantha
Southern bluet
Houstonia purpurea
Venus' pride
Houstonia subviscosa
Houstonia teretifolia
Houstonia palmeri
Houstonia acerosa
Houstonia procumbens
Houstonia croftiae
Houstonia sharpii
Houstonia macvaughii
Houstonia correllii
Houstonia longifolia var. tenuifolia
Houstonia longifolia var. compacta
Houstonia acerosa var. polypremoides
Houstonia purpurea var. calycosa
Houstonia purpurea var. purpurea
Houstonia acerosa var. tamaulipana
Houstonia humifusa
Houstonia palmeri var. palmeri
Houstonia spellenbergii
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