Summary description from Wikipedia:

Houstonia in languages:

English

bluets

English

flowering bluets

Japanese

ヒナソウ属

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Parent Taxon

• Rubiaceae

Sibling Taxa

• Agathisanthemum
• Amphiasma
• Amphistemon
• Anthospermopsis
• Arcytophyllum
• Astiella
• Bouvardia
• Carajasia
• Carterella
• Conostomium
• Coptophyllum
• Cordylostigma
• Crusea
• Debia
• Denscantia
• Dentella
• Diacrodon
• Diadorimia
• Dibrachionostylus
• Dimetia
• Diodia
• Dolichocarpa
• Dolichometra
• Edrastima
• Emmeorhiza
• Ernodea
• Exallage
• Galianthe
• Gomphocalyx
• Hedyotis
• Hedythyrsus
• Hexasepalum
• Houstonia
• Hydrophylax
• Involucrella
• Kadua
• Kohautia
• Lathraeocarpa
• Lelya
• Leptomischus
• Leptopetalum
• Leptoscela
• Lucya
• Manettia
• Manostachya
• Martensianthus
• Maschalodesme
• Merumea
• Mexotis
• Micrasepalum
• Mitracarpus
• Mitrasacmopsis
• Neanotis
• Nesohedyotis
• Nodocarpaea
• Oldenlandia
• Oldenlandiopsis
• Paganuccia
• Paranotis
• Pentanopsis
• Pentodon
• Phialiphora
• Phyllocrater
• Phylohydrax
• Planaltina
• Polyura
• Pseudonesohedyotis
• Psyllocarpus
• Richardia
• Sacosperma
• Schwendenera
• Scleromitrion
• Spermacoce
• Staelia
• Stenaria
• Stenotis
• Stephanococcus
• Synaptantha
• Tessiera
• Thamnoldenlandia
• Tobagoa
• Tortuella

Child Taxa

• Houstonia acerosa
• Houstonia caerulea
• Houstonia canadensis
• Houstonia correllii
• Houstonia croftiae
• Houstonia humifusa
• Houstonia longifolia
• Houstonia macvaughii
• Houstonia micrantha
• Houstonia montana
• Houstonia ouachitana
• Houstonia palmeri
• Houstonia parviflora
• Houstonia procumbens
• Houstonia prostrata
• Houstonia purpurea
• Houstonia pusilla
• Houstonia rosea
• Houstonia rubra
• Houstonia rupestris
• Houstonia serpyllifolia
• Houstonia sharpii
• Houstonia spellenbergii
• Houstonia subviscosa
• Houstonia teretifolia
• Houstonia wrightii

Top Observation Places

• Little Rock
• Halifax
• Dartmouth
• Roswell
• Murfreesboro
• Columbia
• Ellicott City
• Newport News
• Raleigh
• West Raleigh
• Cary
• Chattanooga
• East Chattanooga
• Durham
• Chapel Hill
• Washington
• Arlington
• Alexandria
• Germantown
• Silver Spring
• Centreville
• Gaithersburg
• Rockville
• Dale City
• Bethesda
• Reston
• Leesburg