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 wrong or missing on about Houstonia rupestris? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months. If a species is not keyed, that's because keying is ongoing. Please don't send us feedback about unkeyed species.
Horticultural Information
No horticultural data found for this taxon.