Houstonia rupestris Rafinesque. Common name: Cliff Diamond-flower. Phenology: May-Oct. Habitat: Limestone river bluffs and cliffs. Distribution: Largely restricted to limestone cliff-tops along the Kentucky River Palisades, the Cumberland River in KY and TN, and
perhaps the Sequatchie Valley in TN.
Origin/Endemic status: Endemic
Taxonomy Comments: Not recently given credence, but this taxon appears to warrant recognition a distinctive taxonomic entity (perhaps better treated at varietal rank). Needing additional study.
Synonymy ⓘ: < Hedyotis nigricans (Lam.) Fosberg — C, Rogers (1987); < Hedyotis nigricans (Lam.) Fosberg var. nigricans — Tn, Terrell (1986), Terrell (1991), Turner (1995b); < Houstonia angustifolia Michx. — S; < Houstonia nigricans (Lam.) Fernald — F, G; < Stenaria nigricans (Lam.) Terrell var. nigricans — K4, Terrell (2001). Basionym: Houstonia rupestris Raf. 1820
Show parent genus | Show parent in key(s)
Heliophily ⓘ: 6
Hover over a shape, letter, icon, or arrow on the map for definition or see the legend.
© Brandon Corder source | Original Image ⭷
© Brandon Corder source | Original Image ⭷Feedback
See something missing or incorrect about Houstonia rupestris? Let us know here:
- Please include your name and if possible, email in case when need to clarify what you wrote.
- If you opt out of including email, please be as specific as possible (e.g., which photo is incorrect?)
- Please do not submit questions asking to identify plants or about horticultural topics (e.g., how do I control an invasive plant in my garden?). Instead, those questions can be submitted here for the Carolinas region only.
- Please do not send us feedback about unkeyed species as this work is ongoing.
- Please allow time for flora edits to show in our next data release. We greatly appreciate your feedback but may require extra time to research complicated taxonomic issues.
Horticultural Information
No horticultural data found for this taxon.