Buchnera floridana

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Buchnera floridana
Buch flor.jpg
Photo by John R. Gwaltney, Southeastern Flora.com
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Order: Scrophulariales
Family: Scrophulariaceae
Genus: Buchnera
Species: B. floridana
Binomial name
Buchnera floridana
BUCH AMER dist.jpg
Natural range of Buchnera floridana from USDA NRCS Plants Database.

Common names: Florida Bluehearts; Savanna Bluehearts

Taxonomic notes

Synonyms: none[1]

Varieties: B. longifolia Swartz (by misattribution); B. floridana Gandoger; B. elongata Swartz[1]


The genus Buchnera are hairy perennials with erect, simple stems growing between 40 - 80 cm tall. The entire plant turns black when dried. The leaves are oppositely arranged, elliptic to ovate-lanceolate in shape, entire or irregularly serrate, and grow up to 3 - 7 cm long and 5 - 15 mm wide, and is reduced above. The inflorescence is an open spike with the flowers in the axils of opposite bracts and supported by 2 bractlets. The 3.5 - 5 mm long calyx tube is cylindrical with lobes 5, lanceolate in shape, slightly unequal, up to 1 mm or less long. The bilaterally symmetrical flowers are purple or white in color and form a tube with 5 petals bent abruptly at right angles. Up to 4 fertile stamens are present with anthers with only a single sac. The 5 - 6 mm capsule seed is ovoid or pyriform.[2]

Specifically, for Buchnera floridana, the leaves are not 3-veined or not as conspicuous are B. americana. The leaves are lanceolate to elliptic in shape. The flower tube grows up to 8 - 10 mm long and the petals grow up to 4 - 5 mm long.[2]


Mostly restricted to the coastal plain.[3]



General habitats are pine savannas, seepage bogs, flatwoods, and sandy roadsides.[4] Other habitats include low lying swamp and sandy acidic pine and palm barrens.[5] This species has been observed in Everglades National Park.[6]


B. floridana flowers and fruits all year.[6] Flowers are blue-violet or white and bisexual with a superior ovary.

Fire ecology

Thrives in fire-maintained pine graminoid ecosystems in strongly acidic soils.[3]

Herbivory and toxicology

B. floridana is noted to have poor forage value.[7] It is a host plant of Brevipalpus phoenicis, which vectors viral diseases like citrus leprosis.[8]

Conservation, cultivation, and restoration

Cultural use

Photo Gallery

References and notes

  1. 1.0 1.1 Weakley, A.S. 2020. Flora of the Southeastern United States. Edition of 20 October 2020. University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
  2. 2.0 2.1 Radford, Albert E., Harry E. Ahles, and C. Ritchie Bell. Manual of the Vascular Flora of the Carolinas. 1964, 1968. The University of North Carolina Press. 954-5. Print.
  3. 3.0 3.1 [[1]]Accessed: April 4, 2016
  4. Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.
  5. [[2]]
  6. 6.0 6.1 Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: June 2014. Collectors: V. I. Sullivan and J. Wooten. States and Counties: Florida: Monroe.
  7. Hilmon, J. B. (1964). "Plants of the Caloosa Experimental Range " U.S. Forest Service Research Paper SE-12
  8. Childers, C. C., J. C. V. Rodrigues, et al. (2003). "Host plants of Brevipalpus californicus, B. obovatus, and B. phoenicis (Acari: Tenuipalpidae) and their potential involvement in the spread of viral diseases vectored by these mites." Experimental & Applied Acarology 30: 29-105.