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This genus is accepted, and its native range is SE. U.S.A.
A specimen from Kew's Herbarium

[LKGF]

Harley, R.M. et al. (2004). Labiatae, in The Families and Genera of Vascular Plants (K. Kubitzki, ed. in chief) VI: 167-275. Springer-Verlag, Berlin, Heidelberg, New York.

Morphology General Habit
Rhizomatous perennial herbs with simple hairs
Morphology Leaves
Upper leaves sessile, lower usually petiolate
Morphology Reproductive morphology Inflorescences
Inflorescence racemoid, of terminal and subterminal capitate glomerules
Morphology Reproductive morphology Flowers
Flowers sessile
Morphology Reproductive morphology Flowers Calyx
Calyx zygomorphic, 3-lobed (1/2), anterior lobes often emarginate (each probably representing 2 fused lobes)
Morphology Reproductive morphology Flowers Corolla
Corolla 2-lipped, 4-lobed (1/3), white to lavender, posterior lip shallowly hooded, entire, tube exannulate
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, filaments villous, apically geniculate, anthers bearded on ventral surface, thecae parallel to divergent, not confluent, suture bordered with 5-10 conspicuous teeth, outer thecae of anterior stamens fused
Morphology Reproductive morphology Flowers Disc
Disc with abaxial lobe surpassing ovary
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma-lobes equal to subequal
Morphology Reproductive morphology Fruits
Nutlets obovoid, longitudinally ridged, glabrous.
Note
2n = 18.  Two species.
Ecology
Wetlands and pine savannas
Distribution
Southeastern United States.

Native to:

Alabama, Florida, North Carolina, South Carolina

Macbridea Elliott ex Nutt. appears in other Kew resources:

First published in Gen. N. Amer. Pl. 2: 36 (1818)

Accepted by

  • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.

Literature

Lamiaceae Key Genus Fact Sheets

  • Harley RM, Atkins S, Budantsev AL, Cantino PD, Conn BJ, Grayer R, Harley MM, de Kok RPJ, Krestovskaja T, Morales R, Paton AJ, Ryding O, and Upson T. 2004. Labiatae, in The Families and Genera of Vascular Plants (K. Kubitzki, ed. in chief) VI: 167-275. Sp
  • Macbridea Elliott ex Nutt., Gen. N. Amer. Pl. 2: 36 (1818).

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Lamiaceae Key Genus Fact Sheets
Nina Davies, Gemma Bramley and Don Kirkup, Royal Botanic Gardens, Kew
http://creativecommons.org/licenses/by/3.0