Lectotypification of three names of Teucrium L. (Lamiaceae) THITTAYIL PUTHUSSERI KRISHNARAJ krishnarajtp@gmail.com https://ror.org/05yeh3g67 0009-0004-9965-2945 Alan THOMAS S. permafrostalan06@gmail.com https://ror.org/05yeh3g67 0000-0002-8907-6639 PURAYIDATHKANDY SUNOJKUMAR drsunoj@gmail.com https://ror.org/05yeh3g67 0000-0003-0453-7684 2026-06-10T13:33:00 Muséum national d'Histoire naturelle 11/05/2025 07/07/2025 55-60 08/04/2026 48 (8) 08/04/2026 10.5252/adansonia2026v48a8 http://adansonia.com/48/8 DF13FF80FFBDFFDA5B32E35F3212FFDA 1396266a-28e7-455b-bf4e-17a055555d71 19484564 314864

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 color:black; Lamiaceae nomenclature Teucrium lectotypifications. Lamiaceae nomenclature Teucrium lectotypifications. Révision Lectotypification of three names of Teucrium L. (Lamiaceae) THITTAYIL PUTHUSSERI KRISHNARAJ Angiosperm Taxonomy Division, Department of Botany, University of Calicut, Calicut University P. O., Malappuram, Kerala, 673 635 (India) Alan THOMAS S. Angiosperm Taxonomy Division, Department of Botany, University of Calicut, Calicut University P. O., Malappuram, Kerala, 673 635 (India) PURAYIDATHKANDY SUNOJKUMAR Angiosperm Taxonomy Division, Department of Botany, University of Calicut, Calicut University P. O., Malappuram, Kerala, 673 635 (India)

ABSTRACT. Teucrium L. is one of the largest genera in the family Lamiaceae. In India, ten species have been reported so far. While revising the genus Teucrium in India, it was found that three names require lectotypification. Accordingly, lectotypes are designated here for Teucrium wattii Prain, Teucrium plectranthoides Gamble and Teucrium quadrifarium Buch.-Ham. ex D.Don.

KEYWORDS: Lamiaceae, nomenclature, Teucrium, lectotypifications.

RÉSUMÉ. Teucrium L. est l’un des plus grands genres de la famille des Lamiacées. En Inde, dix espèces ont été signalées jusqu’à présent. Lors de la révision du genre Teucrium en Inde, il a été constaté que trois noms nécessitent une lectotypification. En conséquence, des lectotypes sont désignés ici pour Teucrium wattii Prain, Teucrium plectranthoides Gamble et Teucrium quadrifarium Buch.-Ham. ex D.Don.

MOTS CLÉS: Lamiaceae, nomenclature, Teucrium, lectotypifications.
Introduction

Teucrium L. is one of the largest genera in the subfamily Ajugoideae of the family Lamiaceae ‌(Harley et al. 2004). It is a polymorphic and cosmopolitan genus (Tutin & Wood 1972) comprises approximately 295 species worldwide (POWO 2025). Interestingly about 95 % of all taxa are found in the Mediterranean region, which is the core distribution area of this genus (Cantino 1992; Mabberley 2017). While most species of Teucrium are native to Mediterranean region, some are found in Australia, Central Asia, and the Americas, and occupy diverse habitats ranging from the dry rocky soils to woodlands and grasslands (Navarro 2020).

Linnaeus (1753) first described the genus Teucrium, with 27 species. Hooker (1885) recorded eight species in the Flora of British India and Mukerjee (1940) reported 18 species in Revision of the Labiatae of the Indian Empire. Recently, Sampath Kumar et al. (2020) and Pandey & Singh (2024) reported ten species and two varieties from India. In this article, three names of Teucrium are lectotypified according to ICN Shenzhen code Article 9.12 (Turland et al. 2018).

SYSTEMATICS ‌ Lamiaceae ‌Martinov ‌ Teucrium L.
Teucrium ‌plectranthoides ‌Gamble 232A87F8-FFBE-FFD9-5A3F-E70A3026F836 10.5281/zenodo.19557435

Flora of the presidency of Madras: 1158 (Gamble 1924).

Type material

India • Sengalteri,Tinnevelly; 25.IX.1916; s.coll.; s.n.; lectotype: [K000821627]! digital image, here designated (Fig. 1)•isolectotypes: [CAL0000020524]! digital image, [MH00002428, MH00002429, MH00002430, MH00002431, MH00002432]!, NYBG [NY0044453]! digital image.

Notes

Teucrium ‌plectranthoides was described by Gamble (1924) based on specimens collected from the Western Ghats near Sengaltheri in Tirunelveli district, Tamil Nadu. There was no collection number mentioned in the protologue, and no holotype was designated. After an exhaustive search, one sheet at CAL [CAL0000020524], five sheets at MH [MH00002428, MH00002429, MH00002430, MH00002431, MH00002432], one at K [K000821627], and one at NYBG [NY0044453] were found. All eight sheets were annotated with the collection locality “Sengalteri-Tinnevelly”, with the collection date 25.Sep.1916, and of a single gathering. However, the sheet found at K [K000821627] is well preserved and has an additional label including the mounted parts of inflorescence, flowers, corolla, and calyx separately, with drawings of flower parts in Gamble’s hand. This specimen matches well with the description provided in the protologue. Therefore, the herbarium specimen K000821627 is designated here as lectotype according to ICN Shenzhen code Article 9.12 (Turland et al. 2018).
Teucrium ‌wattii ‌Prain 232A87F8-FFBE-FFD9-58C6-E3873738FB56 10.5281/zenodo.19485401

Journal of the Asiatic Society of Bengal. Part 2. Natural History 59 (4): 317 (Prain 1891).

Type material

India • Manipur-Kassome Summit; 1882; George ‌Watt 5127; lectotype: [CAL0000020523]! digital image, here designated (Fig. 2)•isolectotypes: [CAL0000020521, CAL0000020522]! digital image, [K000821628]! digital image, [G00402072]! digital image, [E00301966]! digital image.

Notes

Teucrium ‌wattii was described by Prain in 1890 based on specimens collected by George ‌Watt with collection number 5127 from Manipur, Kassome summit region, and no holotype was designated. While searching for type specimens, six specimens collected by Watt were found in different herbaria. Of these, three sheets were deposited in CAL [CAL0000020521, CAL0000020522, CAL0000020523], one each at K [K000821628], G [G00402072], E [E00301966]. All the herbarium specimens are based on a single gathering with collection number 5127. The specimen at CAL [CAL0000020523] is well preserved and matches well with the description provided in the protologue, and some fully opened corollas with stamens were also found well-mounted on the herbarium sheet. Additionally, a comparative illustration of the corolla of different Teucrium species is included. Therefore, the herbarium specimen CAL0000020523 is designated here as the lectotype for the name Teucrium ‌wattii ‌Prain in accordance with Article 9.12 of ICN (Turland et al. 2018).
Teucrium ‌quadrifarium ‌Buch.-Ham. ex D.Don 232A87F8-FFBE-FFD9-585B-E78736FBF836 10.5281/zenodo.19485417

Prodromus ‌Florae Nepalensis: 108 (Don 1825).

Type material

Nepal • 27.VIII.1802; Buchanan Hamiltons.n.; lectotype: [BM000521963]! digital image, here designated (Fig. 3)•syntypes: [K001114913, K001114914, K001114915, K000821620]! digital image, [E00634434]! digital image, [P00686398, P00686399, P00686460]! digital image.

Notes

Teucrium ‌quadrifarium was first published in Prodromus ‌Florae Nepalensis in 1825 by David Don. The author cited herbarium specimens of Hamilton and Wallich in the protologue, that were collected from Nepal. While searching for the herbarium specimens nine sheets were found, which are distributed in BM [BM000521963], K [K001114913, K001114914, K001114915, K000821620], and E [E00634434] and P [P00686398, P00686399, P00686460]. The sheets deposited in K and E and P (except [P00686460] are collected from Nepal bearing the Wallich catalogue number 2024.1. The herbarium specimen found at BM [BM000521963], which was collected by Hamilton, is in accordance with the protologue and designated here as the lectotype of Teucrium ‌quadrifarium according to Article 9.12 of ICN (Turland et al. 2018).
Acknowledgements

The authors are grateful to the Board of Trustees of Royal Botanic Gardens, Kew (K), Natural History Museum, London (BM), Director, Botanical Survey of India, Kolkata (CAL), for providing the images of the selected lectotypes. We thank the Kerala State Council for Science Technology and Environment for the research grant support (Order No.333/2022/KSCSTE dated 8.10.2022). The first author is indebted to the University of Calicut and the second author is indebted to the UGC for the Research Fellowship. We appreciate the reviewers Thierry Deroin (MNHN) and Dr. V. Sampath Kumar (Botanical Survey of India Southern Regional Center) for their valuable suggestions and comments.

Fig. 1. — Lectotype of Teucrium ‌plectranthoides ‌Gamble (K000821627). RBG Kew (reproduced with permission).10.5281/zenodo.19484567
Fig. 2. — Lectotype of Teucrium ‌wattii ‌Prain (CAL0000020523). Director, Botanical Survey of India, Kolkata (reproduced with permission).10.5281/zenodo.19484572
Fig. 3. — Lectotype of Teucrium ‌quadrifarium ‌Buch.-Ham. ex D.Don (BM000521963). The Trustees of The Natural History Museum, London (reproduced with permission).10.5281/zenodo.19484578
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