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Rubiaceae
Houstonia

not marked as a favorite taxon Houstonia longifolia Gaertner var. glabra Terrell. Common name: Granite Dome Bluet. Phenology: Jun-Aug; Sep-Oct. Habitat: Seasonally and periodically wet soils of shallow soil mats and crevices of granitic domes. Distribution: Var. glabra is endemic to the granitic dome district centered around Highlands, NC, occurring in sw. NC, nw. SC, and ne. GA

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Origin/Endemic status: Endemic

Other Comments: Terrell (1959) says "the lower internodes [are often] so smooth they appear to have been polished," and gives an altitudinal range of 850-1750 m. Although the morphological differences between var. glabra and var. compacta are not great, the combination of distinctive morphology correlated with a distinctive habitat and a disjunct range seem to warrant recognition at the varietal level.

Synonymy ⓘ: = Terrell (1959); = Houstonia longifolia Gaertn. — Terrell (1996); < Houstonia longifolia Gaertn. — K4, RAB, S, W. Basionym: Houstonia longifolia Gaertn. var. glabra Terrell 1959

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Heliophily ⓘ: 8

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image #1 of Houstonia longifolia var. glabra© Alan M. Cressler | Original Image ⭷
image #2 of Houstonia longifolia var. glabra© Alan M. Cressler | Original Image ⭷
image #3 of Houstonia longifolia var. glabra© Alan M. Cressler | Original Image ⭷
image #4 of Houstonia longifolia var. glabra© Alan Weakley source

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Horticultural Information

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