Summary ⁷

Tansy (Tanacetum vulgare) is a perennial, herbaceous flowering plant of the aster family, native to temperate Europe and Asia. It has been introduced to other parts of the world including North America, and in some areas has become invasive. It is also known as common tansy, bitter buttons, cow bitter, or golden buttons.

Description ⁸

Perennials, mostly 40–150 cm. Stems 1–2+ (ridged), erect, branched distally (glabrous or sparsely hairy). Leaves basal (soon withering) and cauline; petiolate or sessile; blades broadly oblong or oval to elliptic, 4–20 × 2–10 cm, pinnately lobed (rachises ± winged, primary lobes 4–10 pairs, lance-linear to lanceolate or narrowly elliptic, often pinnately lobed or toothed), ultimate margins dentate, faces glabrous or sparsely hairy, gland-dotted. Heads 20–200 in compact, corymbiform arrays. Involucres 5–10 mm diam. Receptacles convex to conic, epaleate. Ray florets 0 (heads disciform, peripheral pistillate florets ca. 20; corollas yellow, lobes 3–4). Disc corollas 2–3 mm. Cypselae 1–2 mm, 4–5-angled or -ribbed, gland-dotted; pappi coroniform, 0.2–0.4 mm. 2n = 18.

Sources and Credits

1. (c) Kingsbrae Garden, some rights reserved (CC BY-NC-SA), http://www.flickr.com/photos/32598399@N00/1175159336
2. Prof. Dr. Otto Wilhelm Thomé (1840–1925), no known copyright restrictions (public domain), https://upload.wikimedia.org/wikipedia/commons/6/60/Illustration_Tanacetum_vulgare0.jpg
3. (c) 2007 Zoya Akulova, some rights reserved (CC BY-NC), http://calphotos.berkeley.edu/cgi/img_query?seq_num=231154&one=T
4. (c) anonymous, some rights reserved (CC BY-NC), http://www.biopix.com/photos/SDL-Tanacetum-vulgare-00005.jpg
5. (c) 2014 Zoya Akulova, some rights reserved (CC BY-NC), http://calphotos.berkeley.edu/cgi/img_query?seq_num=618194&one=T
6. (c) 2014 Zoya Akulova, some rights reserved (CC BY-NC), http://calphotos.berkeley.edu/cgi/img_query?seq_num=618193&one=T
7. (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Tanacetum_vulgare
8. (c) Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/4990671

More Info

• iNat taxon page
• African Plants - a photo guide
• Atlas of Living Australia
• Biodiversity Heritage Library
• BOLD Systems BIN search
• Calflora
• CalPhotos
• eFloras.org
• Flora Digital de Portugal
• Flora of North America (beta)
• Global Biodiversity Information Facility (GBIF)
• Go Botany
• HOSTS - a Database of the World's Lepidopteran Hostplants
• IPNI (with links to POWO, WFO, and BHL)
• Jepson eFlora
• Maryland Biodiversity Project
• NatureServe Explorer 2.0
• NBN Atlas
• New Zealand Plant Conservation Network
• OregonFlora.org
• SEINet Symbiota portals
• Tropicos
• USDA PLANTS database
• VASCAN by Canadensys
• World Flora Online
• 日本のレッドデータ検索システム
• 植物和名−学名インデックス YList

Range Map

(c) Discover Life and original sources, some rights reserved (CC-BY-NC-SA)

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