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Houstonia [Rubiaceae]

Houstonia croftiae – Croft's bluet
[Texas Endemic]

Houstonia croftiae
H. croftiae, 18 March 2004
Houstonia croftiae
H. croftiae, 18 March 2004
Houstonia croftiae
H. croftiae, 18 March 2004
Houstonia croftiae
H. croftiae, 18 March 2004

Houstonia subviscosa – nodding bluet
[Texas Endemic]

Houstonia subviscosa
H. subviscosa, 18 March 2004
Houstonia subviscosa
H. subviscosa, 20 March 2007
Houstonia subviscosa
H. subviscosa, 20 March 2007
Houstonia subviscosa
H. subviscosa, 2 April 2004