OF THE CAROLINAS & GEORGIA

Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Lamiids: Gentianales

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/14/23):
Houstonia micrantha   FAMILY Rubiaceae   Go to FSUS key



SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Houstonia micrantha   FAMILY Rubiaceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)

Houstonia micrantha

SYNONYMOUS WITH Floristic Synthesis of North America (Kartesz, 1999)

Houstonia micrantha

SYNONYMOUS WITH The Genera of Cinchonoideae (Rubiaceae) in the southeastern US (Rogers, 1987)

Hedyotis australis

SYNONYMOUS WITH (MISAPPLIED) Manual of the Southeastern Flora (Small, 1933, 1938)

Houstonia pusilla

 

COMMON NAME:
Southern Bluet


         To see larger pictures, click or hover over the thumbnails.

image of Houstonia micrantha, Southern Bluet

Gill Newberry    gn030323_hmicrantha_1405

March    Spartanburg County    SC

Peter's Creek Heritage Preserve

image of Houstonia micrantha, Southern Bluet

Gill Newberry    gn030323_hmicrantha_1409

March    Spartanburg County    SC

Peter's Creek Heritage Preserve

image of Houstonia micrantha, Southern Bluet

JK Marlow    jkm110316_012

March    Greenville County    SC

image of Houstonia micrantha, Southern Bluet

JK Marlow    jkm160311_140

March    Greenville County    SC

image of Houstonia micrantha, Southern Bluet

JK Marlow    jkm160311_142

March    Greenville County    SC

Corollas white, 2.0-5.5mm long (vs. H. pusilla, purple or violet, 3.5-10+mm, per Weakley's Flora (2015).

image of Houstonia micrantha, Southern Bluet

JK Marlow    jkm160311_144

March    Greenville County    SC

image of Houstonia micrantha, Southern Bluet

JK Marlow    jkm160311_151

March    Greenville County    SC

Calyx lobes slightly shorter than to slightly longer than the corolla tube, per Weakley's Flora (2015).

image of Houstonia micrantha, Southern Bluet

JK Marlow    jkm170324_214

March    Greenville County    SC

Swamp Rabbit Trail

image of Houstonia micrantha, Southern Bluet

JK Marlow    jkm170406_453

March    Greenville County    SC

Swamp Rabbit Trail

Leaves opposite, with at most a few short-lived basal leaves, per Weakley's Flora (2020).

image of Houstonia micrantha, Southern Bluet

JK Marlow    jkm200315_3191

March    Greenville County    SC

image of Houstonia micrantha, Southern Bluet

JK Marlow    jkm200315_3194

March    Greenville County    SC

H. micrantha's small white flowers mixed with the larger blue H. pusilla.

image of Houstonia micrantha, Southern Bluet

JK Marlow    jkm200315_3197

March    Greenville County    SC

Again, H. micrantha's small white flowers mixed with the larger blue H. pusilla.

image of Houstonia micrantha, Southern Bluet

JK Marlow    jkm200315_3204

March    Greenville County    SC

image of Houstonia micrantha, Southern Bluet

JK Marlow    jkm230325_2013

March    Pickens County    SC

Capsules of Houstonia spp. are 2-locular, slightly flattened, lower half enclosed by calyx tube, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

 

 

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/14/23):
Houstonia micrantha   FAMILY Rubiaceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Houstonia micrantha   FAMILY Rubiaceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Houstonia micrantha

SYNONYMOUS WITH Floristic Synthesis of North America (Kartesz, 1999)
Houstonia micrantha

SYNONYMOUS WITH The Genera of Cinchonoideae (Rubiaceae) in the southeastern US (Rogers, 1987)
Hedyotis australis

SYNONYMOUS WITH (MISAPPLIED) Manual of the Southeastern Flora (Small, 1933, 1938)
Houstonia pusilla

 

Find by SCIENTIFIC NAME:

2962

Forb
Annual

Habitat: dunes, sandy soils, granitic flatrocks, other glades, disturbed areas, roadsides, per Weakley's Flora

Native west of the Carolinas & Georgia

Rare

map
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.

LEAVES:
Simple
Opposite, with at most a few short-lived basal leaves
Margins entire

FLOWER:
Spring
Purple/Violet (rarely white)
Radially symmetrical
4 sepals
4-lobed salverform corolla
4 included stamens
Bisexual

Flowers solitary, terminal

FRUIT:
Spring/Summer
Capsule

 

TO LEARN MORE about this plant, look it up in a good book!



 


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