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Houstonia
Family: Rubiaceae
Houstonia image
Steven J. Baskauf
  • VPAP
  • Resources
JANAS 29(1)
PLANTS: Annual or perennial herbs. LEAVES: opposite (in AZ), with inter-petiolar stipules. INFLORESCENCE: cymose or solitary. FLOWERS: het-erostylous (distylous) or homostylous; calyces 4-lobed; corollas 4-lobed, salverform, funnelform, or tubular; stamens 4; stigmas bifid. FRUITS: biloculate capsules, 1/4-3/4 inferior. SEEDS: 2-45 per capsule, crateriform, i.e., subglobose with interior hilar cavity lacking hilar ridge, or slightly to somewhat compressed, with linear or oblong hilar ridge in a saucer- or cup-shaped concavity. NOTES: 20 spp.; U.S., Can., Mex. (for William Houstoun, British physician). REFERENCES: Terrell, Edward E. 1995 Rubiaceae. Houstonia. J. Ariz. - Nev. Acad. Sci. 29(l): 36.
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Houstonia acerosa
Image of Houstonia acerosa
Houstonia arenaria
Image of Houstonia arenaria
Houstonia asperuloides
Image of Houstonia asperuloides
Houstonia bouvardioides
Images
not available
Houstonia brandegeana
Image of Houstonia brandegeana
Houstonia butterwickiae
Image of Houstonia butterwickiae
Houstonia caerulea
Image of Houstonia caerulea
Houstonia calycosa
Image of Houstonia calycosa
Houstonia canadensis
Image of Houstonia canadensis
Houstonia ciliolata
Image of Houstonia ciliolata
Houstonia coerulea
Image of Houstonia coerulea
Houstonia correllii
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not available
Houstonia croftiae
Image of Houstonia croftiae
Houstonia floridana
Image of Houstonia floridana
Houstonia humifusa
Image of Houstonia humifusa
Houstonia lanceolata
Image of Houstonia lanceolata
Houstonia linnaei
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not available
Houstonia longifolia
Image of Houstonia longifolia
Houstonia micrantha
Image of Houstonia micrantha
Houstonia montana
Image of Houstonia montana
Houstonia mucronata
Image of Houstonia mucronata
Houstonia mullerae
Image of Houstonia mullerae
Houstonia ouachitana
Image of Houstonia ouachitana
Houstonia palmeri
Image of Houstonia palmeri
Houstonia parviflora
Image of Houstonia parviflora
Houstonia polypremoides
Image of Houstonia polypremoides
Houstonia procumbens
Image of Houstonia procumbens
Houstonia prostrata
Image of Houstonia prostrata
Houstonia purpurea
Image of Houstonia purpurea
Houstonia pusilla
Image of Houstonia pusilla
Houstonia pygmaea
Image of Houstonia pygmaea
Houstonia rosea
Image of Houstonia rosea
Houstonia rotundifolia
Image of Houstonia rotundifolia
Houstonia rubra
Image of Houstonia rubra
Houstonia serpyllifolia
Image of Houstonia serpyllifolia
Houstonia setiscaphia
Image of Houstonia setiscaphia
Houstonia sharpii
Image of Houstonia sharpii
Houstonia spellenbergii
Images
not available
Houstonia subviscosa
Image of Houstonia subviscosa
Houstonia tenella
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not available
Houstonia tenuifolia
Image of Houstonia tenuifolia
Houstonia umbratilis
Image of Houstonia umbratilis
Houstonia varians
Images
not available
Houstonia wrightii
Image of Houstonia wrightii
The National Science Foundation
Development supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)
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