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Lanceleaf Bluet

Houstonia purpurea var. calycosa

Found in calcareous prairies and barrens, dry woodlands, banks, rock outcrops, shallow soils around mafic and calcareous rock outcrops. Weakley, Flora of the Southeastern United States (2025), Northern Tier edition What its natural habitat tells you

35
Good

Native to West Virginia (estimated). How scores work Is it native here?

Profile 94%

Height
Up to about 20 inches
Light
Partial shade, Full sun
Soil moisture
Dry to moist
Will it fit your yard?

At a glance

Life cycle
Perennial
Bloom
May to July
Fruiting season
July to August

Not yet recorded · Spread · Leaves

Recorded in 1 West Virginia county.

Natural habitats

Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.

1 of 5

Glades, barrens and outcrops on limestone

Cedar glade in the Pennyroyal Plain, Simpson County
Limestone cedar glade. Shown: Pennyroyal Plain, Simpson County, Kentucky, a neighboring state.Cedar glade in the Pennyroyal Plain, Simpson County, Mason Brock (Masebrock), undated. Public domain. Source record.

Prairies and grasslands

Barrens native plants returning after prescribed fire, September 2020
Barrens grassland after a prescribed fire. Shown: Mammoth Cave National Park, Kentucky, a neighboring state.Barrens native plants returning after prescribed fire, September 2020, NPS Photo / Rick Olson, September 2020. Public domain. Source record.

Dry forests and woodlands

Forests and open woodlands on dry ridges and slopes, often oak or pine.

Cliffs, ledges and rocky summits

Cliffs, ledges, rock outcrops, talus and rocky summits where the source does not name the rock. A named rock files the place under its own glade or outcrop type instead.

Glades, barrens and outcrops on mafic or serpentine rock

Open, thin-soil openings, outcrops and cliffs on dark, magnesium- or iron-rich rock such as serpentine, diabase or gabbro.

All habitats

Ecological relationships

Who uses this plant?

What these records mean

1CaterpillarsGenus host records with ranges including WV

Genus host records with ranges including WV · Houstonia

  • Thyris maculataSpotted Thyris
Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
13BeesSoutheastern regional records

Southeastern regional records · Houstonia

Individual names are not available yet.

Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
1Specialist beesPollen specialists

Pollen specialists · Houstonia

  • Perdita pedernalensis
Smith, Bachelder, Russell, Morales, Mosher & Seltmann 2024, Bee-Specialization-Modeling v0.6.1 (specialist host table compiled from J. Fowler's pollen specialist bee lists), Zenodo, CC BY 4.0
—BirdsRecorded genus food-resource interactions; not a state feeding claim

No records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects

Growing and identification

Plant details

Family
Rubiaceae
Flower color
White, pink or purple
Fruit begins
July
Fruit ends
August

Safety has not been reviewed for this plant; check toxicity and thorns before planting.

Growing sources and scope
Also known as

Calycose Bluet; Houstonia purpurea var. calycosa; Lance Leaf Bluet

Conservation status

West Virginia rankSNR
Global rankG5T5 [G5]
WV statusNot verified
Federal statusNot verified

Conservation source Global and federal source

In your garden

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How to check your spot

Sources