|Lamium purpureum L.|
The Lamiaceae (// or //) or Labiatae (the mint or deadnettle family) are a family of flowering plants. They have traditionally been considered closely related to Verbenaceae, but in the 1990s, phylogenetic studies suggested that many genera classified in Verbenaceae belong instead in Lamiaceae. The currently accepted version of Verbenaceae may not be more closely related to Lamiaceae than some of the other families in the order Lamiales. It is not yet known which of the families in Lamiales is closest to Lamiaceae.
The family has a cosmopolitan distribution. The enlarged Lamiaceae contains about 236 genera and has been stated to contain 6,900 to 7,200 species, but the World Checklist lists 7,534. The largest genera are Salvia (900), Scutellaria (360), Stachys (300), Plectranthus (300), Hyptis (280), Teucrium (250), Vitex (250), Thymus (220), and Nepeta (200). Clerodendrum was once a genus of over 400 species, but by 2010, it had been narrowed to about 150.
The plants are frequently aromatic in all parts and include many widely used culinary herbs, such as basil, mint, rosemary, sage, savory, marjoram, oregano, hyssop, thyme, lavender, and perilla. Some are shrubs, trees (such as teak), or, rarely, vines. Many members of the family are widely cultivated, owing not only to their aromatic qualities but also their ease of cultivation: these plants are among the easiest plants to propagate by stem cuttings. Besides those grown for their edible leaves, some are grown for decorative foliage, such as coleus. Others are grown for seed, such as Salvia hispanica (chia), or for their edible tubers, such as Plectranthus edulis, Plectranthus esculentus, Plectranthus rotundifolius, and Stachys affinis (chinese artichoke).
The original family name is Labiatae, so given because the flowers typically have petals fused into an upper lip and a lower lip (labia in Latin). The flowers are bilaterally symmetrical with 5 united petals, 5 united sepals. They are usually bisexual and verticillastrate (a flower cluster that looks like a whorl of flowers but actually consists of two crowded clusters). Although this is still considered an acceptable alternative name, most botanists now use the name "Lamiaceae" in referring to this family. The leaves emerge oppositely, each pair at right angles to the previous one (called decussate) or whorled. The stems are frequently square in cross section, but this is not found in all members of the family, and is sometimes found in other plant families.
The last revision of the entire family was published in 2004. It described and provided keys to 236 genera. These are marked with an asterisk in the list below. A few genera have been established or resurrected since 2004. These are marked with a plus sign. The remaining genera in the list are mostly of historical interest only and are from a source that includes such genera without explanation. Few of these are recognized in modern treatments of the family.
The circumscription of several genera has changed since 2004. Tsoongia, Paravitex, and Viticipremna have been sunk into synonymy with Vitex. Huxleya has been sunk into Volkameria. Kalaharia, Volkameria, Ovieda, and Tetraclea have been segregated from a formerly polyphyletic Clerodendrum. Rydingia has been separated from Leucas. The remaining Leucas is paraphyletic over four other genera.
Subfamilies and tribes
In 2004, Lamiaceae were divided into seven subfamilies with ten genera not placed in any of the subfamilies. The unplaced genera are: Tectona, Callicarpa, Hymenopyramis, Petraeovitex, Peronema, Garrettia, Cymaria, Acrymia, Holocheila, and Ombrocharis. The subfamilies are Symphorematoideae, Viticoideae, Ajugoideae, Prostantheroideae, Nepetoideae, Scutellarioideae, and Lamioideae. The subfamily Viticoideae is probably not monophyletic. Prostantheroideae and Nepetoideae are divided into tribes. These are shown in the phylogenetic tree below.
Most of the genera of Lamiaceae have never been sampled for DNA for molecular phylogenetic studies. Most of those that have been are included in the following phylogenetic tree. The phylogeny depicted below is based on seven different sources.
- Stevens, P. F. (July 2012). "Lamiales (Lamiaceae Family)". Angiosperm Phylogeny Website. Retrieved 25 March 2015.
- Angiosperm Phylogeny Group (2009). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III" (PDF). Botanical Journal of the Linnean Society 161 (2): 105–121. doi:10.1111/j.1095-8339.2009.00996.x. Retrieved 2013-06-26.
- "Pronunciation of lamiaceae". Retrieved 2014-11-25.
- Raymond M. Harley, Sandy Atkins, Andrey L. Budantsev, Philip D. Cantino, Barry J. Conn, Renée J. Grayer, Madeline M. Harley, Rogier P.J. de Kok, Tatyana V. Krestovskaja, Ramón Morales, Alan J. Paton, and P. Olof Ryding. 2004. "Labiatae" pages 167-275. In: Klaus Kubitzki (editor) and Joachim W. Kadereit (volume editor). The Families and Genera of Vascular Plants volume VII. Springer-Verlag: Berlin; Heidelberg, Germany. ISBN 978-3-540-40593-1
- Cantino, P.D., Harley, R.M. & Wagstaff, S.J. 1992. Genera of Labiatae: status and classification. Pp. 511-522. In: Raymond M. Harley and Tom Reynolds (editors). Advances in Labiate Science. Richmond, Royal Botanic Gardens, Kew.
- Wagstaff, Steven J.; Hickerson, Laura; Spangler, Russ; Reeves, Patrick A.; Olmstead, Richard G. (1998). "Phylogeny in Labiatae s.l., inferred from cpDNA sequences". Plant Systematics and Evolution 209 (3–4): 265–274. doi:10.1007/bf00985232.
- Heywood, Vernon H.; Brummitt, Richard K.; Seberg, Ole; Culham, Alastair. Flowering Plant Families of the World. Ontario, Canada: Firefly Books. ISBN 978-1-55407-206-4.
- World Checklist of Selected Plant Families
- Yuan, Yao-Wu; Mabberley, David J.; Steane, Dorothy A.; Olmstead, Richard G. (2010). "Further disintegration and redefinition of Clerodendrum (Lamiaceae): Implications for the understanding of the evolution of an intriguing breeding strategy". Taxon 59 (1): 125–133.
- "List of genera in Lamiaceae". In: "Lamiaceae". In: "List of families". In: "Families and genera in GRIN. (see External links below)
- List of Genera in Lamiaceae. At: Vascular Plant Families and Genera. At: World Checklist of Selected Plant Families. At: Electronic Plant Information Center. At: Website of Royal Botanic Gardens, Kew. (see External Links below).
- APG list of Lamiaceae genera
- Bramley, Gemma L.C.; Forest, Félix; Rogier (2009). "Troublesome tropical mints: re-examining generic limits of Vitex and relations (Lamiaceae) in South East Asia". Taxon 58 (2): 500–510.
- Scheen, Anne-Cathrine; Albert, Victor A. (2007). "Nomenclatural and taxonomic changes within the Leucas clade (Lamioideae; Lamiaceae)".". Systematics and Geography of Plants 77 (2): 229–238.
- Scheen, Anne-Cathrine; Albert, Victor A. (2009). "Molecular Phylogenetics of the Leucas Group (Lamioideae; Lamiaceae)".". Systematic Botany 34 (1): 173–181. doi:10.1600/036364409787602366.
- Zhong, Jin-Shun; Li, Jie; Li, Lang; Conran, John G.; Hsi-wen, Li (2010). "Phylogeny of Isodon (Schrad. ex Benth.) Spach (Lamiaceae) and Related Genera Inferred from Nuclear Ribosomal ITS, trnL-trnF Region, and rps16 Intron Sequences and Morphology". Systematic Botany 35 (1): 207–219. doi:10.1600/036364410790862614.
- Walker, Jay B.; Sytsma, Kenneth J. (2007). "Staminal Evolution in the Genus Salvia (Lamiaceae): Molecular Phylogenetic Evidence for Multiple Origins of the Staminal Lever". Annals of Botany 100 (2): 375–391. doi:10.1093/aob/mcl176. PMC 2735309. PMID 16926227.
- Ryding, P. Olof (2010). "Pericarp structure and phylogeny of tribe Mentheae (Lamiaceae)".". Plant Systematics and Evolution 285 (3-4): 165–175. doi:10.1007/s00606-010-0270-9.
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- Lamiaceae in L. Watson and M.J. Dallwitz (1992 onwards). The families of flowering plants: descriptions, illustrations, identification, information retrieval. http://delta-intkey.com