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Mountain mints
Pycnanthemum muticum heds and bracts 001.JPG
Short-toothed mountain mint (Pycnanthemum muticum)
Scientific classification e
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Lamiaceae
Subfamily: Nepetoideae
Tribe: Mentheae
Genus: Pycnanthemum
  • Furera Adans.
  • Brachystemum Michx.
  • Koellia Moench
  • Tullia Leavenw.
  • Pycnanthes Raf.

Pycnanthemum is a genus of herbaceous plants in the mint family (Lamiaceae). Species in this genus are often referred to as "mountain mints" and they often have a minty or thyme-like aroma when crushed. All species of Pycnanthemum are native to the United States and Canada.[1][2][3] The center of diversity for the genus is North Carolina with 13 of the 20 species having been collected therein. Nineteen of the 20 species of Pycnanthemum occur in the Eastern US and Canada, and one disjunct species (P. californicum) occurs in California and Oregon.

Pycnanthemum belongs to the true mint subtribe (Menthinae),[4] and it has been shown to be closely related to the Monarda, Blephilia, and the scrub mints of the Southeastern United States.[5] Relationships within the genus remain unresolved. A complicated history of polyploidization paired with cryptic morphologies makes this a challenging group for systematists.[6]



  1. ^ a b "Pycnanthemum". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  2. ^ "Pycnanthemum". County-level distribution maps from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2013.
  3. ^ Chambers, Henrietta L. (1961-01-01). "Chromosome numbers and breeding systems in Pycnanthemum (Labiatae)". Brittonia. 13 (1): 116–128. doi:10.2307/2805290. ISSN 1938-436X.
  4. ^ Ryding, Olof (2009-06-01). "Pericarp structure in Monarda (Lamiaceae)". Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie. 127 (4): 453–458. doi:10.1127/0006-8152/2009/0127-0453. ISSN 0006-8152.
  5. ^ Edwards, Christine E.; Soltis, Douglas E.; Soltis, Pamela S. (2006-01-01). "Molecular Phylogeny of Conradina and Other Scrub Mints (Lamiaceae) from the Southeastern USA: Evidence for Hybridization in Pleistocene Refugia?". Systematic Botany. 31 (1): 193–207. doi:10.1600/036364406775971688. ISSN 0363-6445.
  6. ^ Chambers, Henrietta L.; Chambers, Kenton L. (January 1971). "Artificial and Natural Hybrids in Pycnanthemum (Labiatae)". Brittonia. 23 (1): 71. doi:10.2307/2805843. ISSN 0007-196X.


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