Houstonia

Distribution Map: Based on vouchered plant specimens from wild populations. Cultivated occurrences are not mapped. View county names by placing the cursor over the map.

Contains 7 accepted taxa overall.

Family:	RUBIACEAE
Genus:	Houstonia L.
Common Name:	BLUETS
Genus Notes:	Based on available data, Stenaria is not amply distinct from Houstonia (Church 2003; Groeninckx et al. 2009; Shanks 2015; Neupane et al. 2017: Appendix S5), differing from previous circumscriptions (Terrell 1996, 2001).
Specimen:	View USF Herbarium specimens of this genus

Classification

Division
Class
Sub Class
Order	GENTIANALES
Family	RUBIACEAE
Genus	*Houstonia*

Citation

Citation	HOUSTONIA Linnaeus, Sp. Pl. 105. 1753.
Basionym:	**
Type:	TYPE: Houstonia caerulea Linnaeus Lectotypified by Standley, in Britton, N. Amer. Fl. 32: 24. 1918.

** Not applicable or data not available.

Species

Scientific Name	Common Name	Herbarium Specimens	Photos
Houstonia longifolia	LONGLEAF SUMMER BLUET
Houstonia micrantha	SOUTHERN BLUET
Houstonia nigricans var. floridana	FLORIDA DIAMONDFLOWERS
Houstonia nigricans var. nigricans	DIAMONDFLOWERS
Houstonia procumbens	INNOCENCE; ROUNDLEAF BLUET
Houstonia purpurea	LARGE SUMMER BLUET; VENUS' PRIDE
Houstonia pusilla	TINY BLUET

Identification Key

Genus Synonyms

Synonym	Full Citation	Basionym	Type
Anotis	Anotis de Candolle, Prodr. 4: 431. 1830.		TYPE: = Panetos Rafinesque 1820.
Chamisme	Chamisme (Rafinesque) Nieuwland, Amer. Midl. Naturalist 4: 92. 1915.	BASIONYM: Houstonia Linnaeus, subg. Chamisme Rafinesque, Ann. Gen. Sci. Phys. 5: 227. 1820.	TYPE: Chamisme purpurea (Linnaeus) Nieuwland (Houstonia purpurea Linnaeus) Lectotypified by Terrell, Syst. Bot. Monogr. 48: 19. 1996.
Panetos	Panetos Rafinesque, Ann. Gen. Sci. Phys. 5: 227. 1820.		TYPE: Panetos rotundifolius (Michaux) Nieuwland (Houstonia rotundifolia Michaux)
Poiretia	Poiretia J. F. Gmelin, Syst. Nat. 2: 213, 263. 1791, nom. rej. vs. Poiretia Cavanilles 1807.		TYPE: Poiretia erecta J. F. Gmelin Lectotypified by Terrell, Syst. Bot. Monogr. 48: 19. 1996.
Stenaria	Stenaria (Rafinesque) Terrell, Sida 19: 592. 2001.	BASIONYM: Houstonia Linnaeus, subg. Stenaria Rafinesque, Ann. Gén. Sci. Phys. 5: 226. 1820.	TYPE: Houstonia rupestris Rafinesque Lectotypified by Terrell, Sida 19: 592. 2001.

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Citation Information:

Wunderlin, R. P., B. F. Hansen, A. R. Franck, and F. B. Essig. 2024. Atlas of Florida Plants (http://florida.plantatlas.usf.edu/). [S. M. Landry and K. N. Campbell (application development), USF Water Institute.] Institute for Systematic Botany, University of South Florida, Tampa.

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