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This genus is accepted, and its native range is America.
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
Annual or perennial herbs or subshrubs, strongly aromatic
Morphology Leaves
Leaves entire or toothed
Morphology Reproductive morphology Inflorescences
Inflorescence of few- to many-flowered, pedunculate to subsessile cymes, or flowers rarely solitary, in axils of bracts, upper cymes often congested in a terminal spiciform thyrse
Morphology Reproductive morphology Inflorescences Bracts
Bracts often leaf-like
Morphology Reproductive morphology Inflorescences Bracteoles
Bracteoles inconspicuous
Morphology Reproductive morphology Flowers
Flowers sometimes cleistogamous
Morphology Reproductive morphology Flowers Calyx
Calyx ± actinomorphic, subequally 5-lobed, or 2-lipped (3/2) with lobes unequal, posterior somewhat connate, deltoid to subulate, anterior lobes usually longer, tube 13-nerved, cylindrical to infundibular, often gibbous at base, throat densely hairy withi
Morphology Reproductive morphology Flowers Corolla
Corolla white, lilac, pink or orange-red, 2-lipped (2/3), posterior lip sometimes subentire, concave to flat, erect or spreading, median anterior lobe usually larger, often emarginate, tube short to elongate, widening upwards, annulate or not within
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2, posterior pair staminodal, anterior pair ascending under posterior corolla lip, included to exserted, thecae ± parallel to widely divaricate, distinct, connective well-developed
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma-lobes unequal, ± subulate, posterior very small
Morphology Reproductive morphology Flowers Disc
Disc symmetrical
Morphology Reproductive morphology Fruits
Nutlets ovoid to oblong, usually 1.5 mm long or less, areolate to foveate, sometimes glaucous, often mucilaginous.
Note
2n = 34, 36, 44, 72, 76, 144.  About 42 species. Irving (1980) recognizes four subgenera, based mainly on habit and reproductive characters.
Distribution
From Canada southwards to Mexico, Central and Southern Southern America, from Peru and Bolivia to Southern Brazil, Uruguay and Argentina.
Ecology
Open montane or submontane, sometimes xeric habitats

Native to:

Alabama, Alberta, Argentina Northeast, Argentina Northwest, Argentina South, Arizona, Arkansas, Bolivia, Brazil South, Brazil Southeast, British Columbia, California, Colorado, Connecticut, Florida, Georgia, Guatemala, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Massachusetts, Mexico Central, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Brunswick, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Nova Scotia, Ohio, Oklahoma, Ontario, Pennsylvania, Peru, Québec, Rhode I., South Carolina, South Dakota, Tennessee, Texas, Uruguay, Utah, Vermont, Virginia, West Virginia, Wisconsin, Wyoming

Hedeoma Pers. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 1981 Palmer, E. [66], California K000910658

First published in Syn. Pl. 2: 131 (1806)

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
  • Hedeoma Pers., Syn. Pl. 131 (1807)
  • Irving, Sida 8(3): 218-295 (1980), rev.
  • Pseudocunila Brade, Rodriguésia 7(16): 27 (1944).

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

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