About 300; see text
Stachys is one of the largest genera in the flowering plant family Lamiaceae. Estimates of the number of species in the genus vary from about 300, to about 450. The type species for the genus is Stachys sylvatica. Stachys is in the subfamily Lamioideae. Generic limits and relationships in this subfamily are poorly known.
The distribution of the genus covers Europe, Asia, Africa, Australasia and North America. Common names include hedgenettle, heal-all, self-heal, woundwort, betony, and lamb's ears. Wood betony, Stachys officinalis, was the most important medicinal herb to the Anglo-Saxons of early medieval Great Britain.
Stachys was named by Linnaeus in Species Plantarum in 1753. The name is derived from the Greek word σταχυς (stachys), meaning "an ear of grain", and refers to the fact that the inflorescence is often a spike. The name woundwort derives from the past use of certain species in herbal medicine for the treatment of wounds.
Stachys species are used as food plants by the larvae of some Lepidoptera species, including the moths Coleophora auricella, C. lineolea, and C. wockeella, all recorded on S. officinalis. They are also widely used by the European wool carder bee (Anthidium manicatum), which scrape the hairs from the plant in order to use them for building their nests.
Stachys is a genus of shrubs and annual or perennial herbs. The stems vary from 50–300 cm (20–120 in) tall, with simple, opposite, triangular leaves, 1–14 cm (0.4–5.5 in) long with serrate margins. In most species, the leaves are softly hairy. The flowers are 1 to 2 cm (0.4 to 0.8 in) long, clustered in the axils of the leaves on the upper part of the stem. The corolla is 5-lobed with the top lobe forming a 'hood', varying from white to pink, purple, red or pale yellow.
The distinction between Stachys and other genera is unclear and has varied from one author to another. In 2002, a molecular phylogenetic study showed that Stachys officinalis is not closely related to the rest of the genus. This study also found six other genera to be embedded within Stachys as it is currently circumscribed. The embedded genera are Prasium, Phlomidoschema, Sideritis, Haplostachys, Phyllostegia, and Stenogyne.
- Stachys affinis Bunge – Chinese artichoke
- Stachys ajugoides Benth. – bugle hedgenettle
- Stachys alabamica B.R. Keener & L.J. Davenp. – Alabama hedgenettle
- Stachys albens A.Gray – white hedgenettle, whitestem hedgenettle
- Stachys albicaulis
- Stachys alopecuros
- Stachys alpina – alpine woundwort
- Stachys annua (L.) L. – annual woundwort
- Stachys arvensis L. – staggerweed, field woundwort
- Stachys bullata Benth.
- Stachys byzantina K.Koch – woolly betony, lamb's ear
- Stachys candida
- Stachys chamissonis Benth. – great hedge nettle, coastal hedge nettle
- Stachys chrysantha
- Stachys ciliata
- Stachys citrina
- Stachys clingmanii – Clingman's hedge nettle
- Stachys coccinea Jacq.
- Stachys cooleyae Heller – Cooley's hedge nettle
- Stachys corsica
- Stachys cretica L.
- Stachys discolor
- Stachys ehrenbergii
- Stachys floridana Shuttlew. ex Benth. – Florida hedgenettle, Florida betony
- Stachys germanica L. – downy woundwort
- Stachys glutinosa
- Stachys hispida – rough hedge-nettle
- Stachys hyssopifolia
- Stachys iva
- Stachys lanata
- Stachys lavandulifolia
- Stachys libanotica
- Stachys macrantha (K.Koch) Stearn
- Stachys macrostachya
- Stachys manantlanensis B.L.Turner
- Stachys mexicana Benth. – Mexican hedge nettle
- Stachys milanii
- Stachys monnieri (Gouan) P.W.Ball
- Stachys nelsonii B.R. Keener & L.J. Davenp. – Nelson's hedgenettle
- Stachys officinalis (L.) Trevis. – betony
- Stachys palustris L. – marsh woundwort, marsh hedge-nettle
- Stachys pumila
- Stachys pycnantha Benth.
- Stachys recta L. – yellow woundwort
- Stachys riddellii
- Stachys rigida Benth. – rough hedgenettle
Formerly placed here
- Agastache foeniculum (Pursh) Kuntze (as S. foeniculum Pursh)
- Leonurus japonicus Houtt. (as S. artemisia Lour.)
- "Genus: Stachys L." Germplasm Resources Information Network. United States Department of Agriculture. 2006-11-03. Archived from the original on 2010-05-29. Retrieved 2010-11-11.
- Kew World Checklist of Selected Plant Families
- Harley, R. M., et al. 2004. "Labiatae". pages 167–275. In: Kubitzki, K. (editor) and J. W. Kadereit (volume editor). The Families and Genera of Vascular Plants volume VII. Springer-Verlag: Berlin; Heidelberg, Germany. ISBN 978-3-540-40593-1
- Mabberley, D. J. 2008. Mabberley's Plant-Book third edition (2008). Cambridge University Press: UK.
- Stachys In: Index Nominum Genericorum. In: Regnum Vegetabile (see External links below).
- "Stachys". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 30 November 2015.
- Carolus Linnaeus. 1753. Species Plantarum 2:580. Laurentii Salvii. (see External Links below).
- Umberto Quattrocchi. 2000. CRC World Dictionary of Plant Names volume I, page 91. CRC Press: Boca Raton; New York; Washington, DC;, USA. London, UK. ISBN 978-0-8493-2673-8 (set). (see External links below).
- Eltz, Thomas; Küttner, Jennifer; Lunau, Klaus; Tollrian, Ralph (6 January 2015). "Plant secretions prevent wasp parasitism in nests of wool-carder bees, with implications for the diversification of nesting materials in Megachilidae". Frontiers in Ecology and Evolution. 2. doi:10.3389/fevo.2014.00086.
- Lindqvist, C. and V. A. Albert. 2002. Origin of the Hawaiian endemic mints within North American Stachys (Lamiaceae). American Journal of Botany 89(10), 1709–24.
- The Pliocene flora of Kholmech, south-eastern Belarus and it's correlation with other Pliocene floras of Europe by Felix Yu. VELICHKEVICH and Ewa ZASTAWNIAK - Acta Palaeobot. 43(2): 137–259, 2003
- "GRIN Species Records of Stachys". Germplasm Resources Information Network. United States Department of Agriculture. Retrieved 2010-11-11.