Plant Assessment Form

Tanacetum vulgare

Common Names: common tansy; golden buttons; garden tansy

Evaluated on: 4/14/04

List committee review date: 14/05/2004

Re-evaluation date:

Evaluator(s)

Rob Wilson
UCCE
707 Nevada St. Susanville, CA 96130
530-251-8132
rgwilson@ucdavis.edu

List commitee members

Carla Bossard
Alison Stanton
Cynthia Roye
Joe DiTomaso
Peter Warner

General Comments

No general comments for this species

Table 2. Criteria, Section, and Overall Scores

Overall Score? Moderate
Alert Status? No Alert
Documentation? 3 out of 5
Score Documentation
1.1 ?Impact on abiotic ecosystem processes U Reviewed Scientific Publication
Impact?
Four-part score UBBD Total Score
B
1.2 ?Impact on plant community B. Moderate Reviewed Scientific Publication
1.3 ?Impact on higher trophic levels B. Moderate Other Published Material
1.4 ?Impact on genetic integrity D. None Observational
2.1 ?Role of anthropogenic and natural disturbance in establishment B. Moderate Reviewed Scientific Publication
Invasiveness?
Total Points
14 Total Score B
2.2 ?Local rate of spread with no management B. Increases less rapidly Other Published Material
2.3 ?Recent trend in total area infested within state C. Stable Observational
2.4 ?Innate reproductive potential
(see Worksheet A)
A. High Other Published Material
2.5 ?Potential for human-caused dispersal B. Moderate Other Published Material
2.6 ? Potential for natural long-distance dispersal B. Occasional Other Published Material
2.7 ?Other regions invaded B. Invades 1 or 2 ecological types Anecdotal
3.1 ?Ecological amplitude/Range
(see Worksheet C)
A. Widespread Anecdotal
Distribution?
Total Score B
3.2 ?Distribution/Peak frequency
(see Worksheet C)
D. Very low Anecdotal

Table 3. Documentation

Scores are explained in the "Criteria for Categorizing Invasive Non-Native Plants that Threaten Wildlands".

Section 1: Impact
Question 1.1 Impact on abiotic ecosystem processes? U Reviewed Scientific Publication
Identify ecosystem processes impacted:

There is very little information available on common tansy effects on abiotic ecoystem processes.


Sources of information:

LeCain, Ron and Sheley, Roger. 2002. Common Tansy (Tanacetum vulgare). MontGuide fact sheet #9911. Montana State University Extension Service


Question 1.2 Impact on plant community composition,
structure, and interactions?
B Reviewed Scientific Publication
Identify type of impact or alteration:

Common tansy is commonly found along roads, fences, streambanks, waste areas, and pastures. Because it is unpalatable to most livestock species, it is a rapid increaser in pastures. In meadows and mountain stream/river valleys common tansy often forms dense stands. Common tansy has also been documented to invade and form dense stands in disturbed areas. In Central Europe, common tansy is known as a highly competitive and aggressive plant which often forms dominant stands. It is capable of colonizing disturbed sites and becoming dominant in early to mid-successional stages. The clonal species is known to have a growth strategy where the main population expands as a thick cluster of stems (phalanx system of spread).


Sources of information:

LeCain, Ron and Sheley, Roger. 2002. Common Tansy (Tanacetum vulgare). MontGuide fact sheet #9911. Montana State University Extension Service
Rebele, Franz. 2000. Competition and coexistence of rhizomatous perennial plants along a nutrient gradient. Plant Ecology 147: 77-94


Question 1.3 Impact on higher trophic levels? B Other Published Material
Identify type of impact or alteration:

Common tansy produces alkaloids and volatile oils that can be toxic at high doses to both humans and livestock. Common tansy oils can also cause skin irritation and algeric reactions in humans. Common tansy oils have also been shown to have insect repellant properties. Distilled oil has been shown to deter mosquitoes, whiteflys, and Colorado potato beetle. These results suggest common tansy may deter some native insects and wildlife from visiting native plants found within infested areas, although bees and other insects also have been documented to pollinate common tansy.


Sources of information:

LeCain, Ron and Sheley, Roger. 2002. Common Tansy (Tanacetum vulgare). MontGuide fact sheet #9911. Montana State University Extension Service
Hough-Goldstein, J.A. 1990. Antifeedant effects of common herbs on the Colorado potato beetle. Environ-Entomol. Entomological Society of America. V. 19, p. 234-238


Question 1.4 Impact on genetic integrity? D Observational

Unknown There is one native species of Tanacetum in California


Sources of information:

Calflora; Jepson Manual 1993


Section 2: Invasiveness
Question 2.1 Role of anthropogenic and natural disturbance
in establishment?
B Other Published Material
Describe role of disturbance:

Common tansy can spread by seeds and rhizomes. It has a phalanx growth strategy. Since common tansy often infests natural areas that lack a lot of human disturbance, natural disturbances may play a significant role in the spread of common tansy. The seed can be moved small distances by wind. Common tansy often spreads along fence lines, so birds and livestock may move seed. Common tansy often spreads along waterways. Since seeds have been documented to move in ballast water, seed probably float and spread along waterways.


Sources of information:

LeCain, Ron and Sheley, Roger. 2002. Common Tansy (Tanacetum vulgare). MontGuide fact sheet #9911. Montana State University Extension Service


Question 2.2 Local rate of spread with no management? B Other Published Material
Describe rate of spread:

Unkown to author. In Plumas County, common tansy populations have become dense and spread along mountain valleys and/or meadows. In Montana and western Canadian provinces common tansy has been documented to spread rapidly in disturbed areas.


Sources of information:

LeCain, Ron and Sheley, Roger. 2002. Common Tansy (Tanacetum vulgare). MontGuide fact sheet #9911. Montana State University Extension Service
Personal communication with Carl Bishop, Plumas CDFA Ag. Commissioner


Question 2.3 Recent trend in total area infested within state? C Observational
Describe trend:

unknown to author, has not appeared to spread much in California despite being much more common in other states.


Sources of information:

DiTomaso, J.M. (ditomaso@vegmail.ucdavis.edu), observational


Question 2.4 Innate reproductive potential? A Other Published Material
Describe key reproductive characteristics:

Common tansy is a perennial that reproduces by seed and rhizomes. Common tansy plants often form dense clumps of stems that produce numerous disc flowers during mid-summer.


Sources of information:

LeCain, Ron and Sheley, Roger. 2002. Common Tansy (Tanacetum vulgare). MontGuide fact sheet #9911. Montana State University Extension Service
Rebele, Franz. 2000. Competition and coexistence of rhizomatous perennial plants along a nutrient gradient. Plant Ecology 147: 77-94


Question 2.5 Potential for human-caused dispersal? B Other Published Material
Identify dispersal mechanisms:

Common tansy is sometimes planted as an ornamental and/or herb. Common tansy often spread along roads. It can be transported by moving soil with root parts and can be moved with livestock. Common tansy has been shown to move in ballast water and also in contaminated crop seed.


Sources of information:

LeCain, Ron and Sheley, Roger. 2002. Common Tansy (Tanacetum vulgare). MontGuide fact sheet #9911. Montana State University Extension Service
Rebele, Franz. 2000. Competition and coexistence of rhizomatous perennial plants along a nutrient gradient. Plant Ecology 147: 77-94


Question 2.6 Potential for natural long-distance dispersal? B Other Published Material
Identify dispersal mechanisms:

Seed can move in water along streams and rivers. Seed is probably moved by birds and rodents.


Sources of information:

LeCain, Ron and Sheley, Roger. 2002. Common Tansy (Tanacetum vulgare). MontGuide fact sheet #9911. Montana State University Extension Service
Rebele, Franz. 2000. Competition and coexistence of rhizomatous perennial plants along a nutrient gradient. Plant Ecology 147: 77-94


Question 2.7 Other regions invaded? B Anecdotal
Identify other regions:

Common tansy is reported as a problem throughout the temperate regions of North America. Common tansy tolerates a wide range of precipitation and temerature zones, giving it the potential to occupy every county in Montana.


Sources of information:

LeCain, Ron and Sheley, Roger. 2002. Common Tansy (Tanacetum vulgare). MontGuide fact sheet #9911. Montana State University Extension Service
Rebele, Franz. 2000. Competition and coexistence of rhizomatous perennial plants along a nutrient gradient. Plant Ecology 147: 77-94


Section 3: Distribution
Question 3.1 Ecological amplitude/Range? A Anecdotal

Little information available on California Distribution. Common tansy has been documented in 12 CA counties primarily in Northern California. In Plumas County, common tansy is commonly found within stream and river valleys and within meadows. It is often found in natural conditions.


Sources of information:

Calflora and personal communication with Carl Bishop , Plumas CDFA Ag. Commissioner


Question 3.2 Distribution/Peak frequency? D Anecdotal
Describe distribution:

Unknown to author, although populations are unlikely to cover more than 5% of any ecological type.


Sources of information:

Worksheet A - Innate reproductive potential

Reaches reproductive maturity in 2 years or less Yes
Dense infestations produce >1,000 viable seed per square meter Yes
Populations of this species produce seeds every year. Yes
Seed production sustained over 3 or more months within a population annually Unknown
Seeds remain viable in soil for three or more years Unknown
Viable seed produced with both self-pollination and cross-pollination Unknown
Has quickly spreading vegetative structures (rhizomes, roots, etc.) that may root at nodes Yes
Fragments easily and fragments can become established elsewhere Unknown
Resprouts readily when cut, grazed, or burned Yes
Total points: 6
Total unknowns: 4
Total score: A?

Related traits:

Worksheet B - Arizona Ecological Types is not included here

Worksheet C - California Ecological Types

(sensu Holland 1986)
Major Ecological Types Minor Ecological Types Code?
Marine Systemsmarine systems
Freshwater and Estuarine lakes, ponds, reservoirs
Aquatic Systemsrivers, streams, canals
estuaries
Dunescoastal
desert
interior
Scrub and Chaparralcoastal bluff scrub
coastal scrub
Sonoran desert scrub
Mojavean desert scrub (incl. Joshua tree woodland)
Great Basin scrub
chenopod scrub
montane dwarf scrub
Upper Sonoran subshrub scrub
chaparral
Grasslands, Vernal Pools, Meadows, and other Herb Communitiescoastal prairie
valley and foothill grassland
Great Basin grassland
vernal poolD, < 5%
meadow and seep
alkali playa
pebble plain
Bog and Marshbog and fen
marsh and swampD, < 5%
Riparian and Bottomland habitatriparian forestD, < 5%
riparian woodland
riparian scrub (incl.desert washes)
Woodlandcismontane woodland
piñon and juniper woodland
Sonoran thorn woodland
Forestbroadleaved upland forestD, < 5%
North Coast coniferous forest
closed cone coniferous forestD, < 5%
lower montane coniferous forest
upper montane coniferous forest
subalpine coniferous forest
Alpine Habitatsalpine boulder and rock field
alpine dwarf scrub
Amplitude (breadth): B
Distribution (highest score): D

Infested Jepson Regions

Click here for a map of Jepson regions

  • Cascade Range
  • Central West
  • Northwest
  • Sierra Nevada
  • Southwest
  • Modoc Plateau
  • Sierra Nevada East