Contains 18 accepted taxa overall.
Characteristics
Classification
Citation
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Species
| Scientific Name | Common Name | Herbarium Specimens | Status | Photos |
|---|---|---|---|---|
| Houstonia caerulea | Quaker Ladies; Azure Bluet | Native AGCP (FAC), EMP (FACU) (NWPL) TN[SNR] KY[S5] (State Rank) G5 (Global Rank) | ||
| Houstonia canadensis | Canada Bluets | Native TN[SNR] KY[S5] (State Rank) G4G5 (Global Rank) | ||
| Houstonia floridana | Rockland Bluet | |||
| Houstonia lanceolata | Lance Leaf Bluet; Calycose Bluet | Native | ||
| Houstonia longifolia | Long Leaf Summer Bluet | |||
| Houstonia longifolia var. compacta | Eastern Lanceleaved Bluet; Eastern Lance Leaved Bluet; Eastern Lance Leaf Bluet; Eastern Lanceleaf Bluet; Virginia or West Virginia Spiraea; West Virginia Spiraea; Virginia Spiraea | Native | ||
| Houstonia longifolia var. glabra | Granite Dome Bluet | |||
| Houstonia longifolia var. longifolia | Northern Longleaf Bluet; Northern Longleaved Bluet; Northern Long Leaf Bluet; Northern Long Leaved Bluet | |||
| Houstonia micrantha | Southern Bluets | Native TN[SNR] (State Rank) G4G5 (Global Rank) | ||
| Houstonia montana | Roan Mountain Bluets | Native Endangered-US | ||
| Houstonia nigricans | Diamond Flower; Glade Bluet; Prairie Bluet; Virginia or West Virginia Spiraea; West Virginia Spiraea; Virginia Spiraea | |||
| Houstonia nigricans var. nigricans | Diamond Flower; Glade Bluet; Prairie Bluet; Virginia or West Virginia Spiraea; West Virginia Spiraea; Virginia Spiraea | Native | ||
| Houstonia nigricans var. pulvinata | Florida Dune Diamond Flower | |||
| Houstonia purpurea | Summer Bluets; Mountain Bluets; Venus Pride | Native TN[SNR] KY[S5] (State Rank) G5 (Global Rank) | ||
| Houstonia pusilla | Tiny Bluets; Small Bluets; Southern Bluets | Native AGCP (FACU), EMP (FAC) (NWPL) TN[SNR] KY[S4?] (State Rank) G5 (Global Rank) | ||
| Houstonia rupestris | Cliff Diamond Flower; Virginia or West Virginia Spiraea; West Virginia Spiraea; Virginia Spiraea | Native | ||
| Houstonia serpyllifolia | Thyme Leaf Bluet | Native AGCP (FACW), EMP (FAC) (NWPL) TN[SNR] KY[S1] (State Rank) G4? (Global Rank) | ||
| Houstonia tenuifolia | Diffuse Branched Bluet; Diffusebranched Bluet; Diffusebranch Bluet; Diffuse Branch Bluet; Virginia or West Virginia Spiraea; West Virginia Spiraea; Virginia Spiraea | Native |