Plant Assessment Form

Rumex crispus

Common Names: curly dock

Evaluated on: 4/15/04

List committee review date: 14/05/2004

Re-evaluation date:

Evaluator(s)

Milad Sarkis
Saint Mary's College of California
P.O. Box 4093, Moraga, CA 94575
(925) 631-5384
msarkis@stmarys-ca.edu

List commitee members

Carla Bossard
Cynthia Roye
Alison Stanton
Peter Warner
Joe DiTomaso

General Comments

No general comments for this species

Table 2. Criteria, Section, and Overall Scores

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

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? D
Identify ecosystem processes impacted:

negligible impact found no evidence to support an abiotic ecosystem process change


Sources of information:

No speceific data site


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

Creation of a new structural layer, and also pushes out native species once established Curly Dock has a deep tap root


Sources of information:

Monaco, T.J., Growth and development of Curly Dock and Broadleaf Dock. Weed Science, Jan 1972. 64-67


Question 1.3 Impact on higher trophic levels? C Reviewed Scientific Publication
Identify type of impact or alteration:

Once established, it easily takes over the habitat. But no specifics were mentioned Curly Dock is easily spread


Sources of information:

Monaco, T.J., Growth and development of Curly Dock and Broadleaf Dock. Weed Science, Jan 1972. 64-67


Question 1.4 Impact on genetic integrity? D Anecdotal

no impact No documentation showing impact on gentic integrity


Sources of information:

no specific documentation noted


Section 2: Invasiveness
Question 2.1 Role of anthropogenic and natural disturbance
in establishment?
C Reviewed Scientific Publication
Describe role of disturbance:

Sources of information:

Maun, M.A. Biography of Curly Dock. Weeds Today. Feb/March 1977, 14,19


Question 2.2 Local rate of spread with no management? C Reviewed Scientific Publication
Describe rate of spread:

Very quick rate of spread without management Large spread due to heavy seed propagulation (40,000 a plant) and seed dormancy


Sources of information:

Monaco, T.J., Growth and development of Curly Dock and Broadleaf Dock. Weed Science, Jan 1972. 64-67


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

No specific data sited, but assuming that it is spread easily Assumed that spread is quick due to the large seed propagulation and seed dormancy


Sources of information:

no specific sources noted


Question 2.4 Innate reproductive potential? B Reviewed Scientific Publication
Describe key reproductive characteristics:

High reproductive potential Assumed that spread is quick due to the large seed propagulation and seed dormancy


Sources of information:

Monaco, T.J., Growth and development of Curly Dock and Broadleaf Dock. Weed Science, Jan 1972. 64-67


Question 2.5 Potential for human-caused dispersal? C Reviewed Scientific Publication
Identify dispersal mechanisms:

seeds transferable as manure because it is not digested outer seed coat is not digested by cattle, and thus it can be spread through manure


Sources of information:

Foster, L. The biology and non-chemical control of dock species Rumex obtusifolious and Rumex crispus. Biological Agricultural and Horticulture: an international journal


Question 2.6 Potential for natural long-distance dispersal? B Anecdotal
Identify dispersal mechanisms:

human dispersal only no mention of direct disperal greater than 1km


Sources of information:

no source noted


Question 2.7 Other regions invaded? C Reviewed Scientific Publication
Identify other regions:

Lakes, ponds, rivers, streams, canals, reserviors, grasslands, swamps. These were identified areas of dock infestations


Sources of information:

Foster, L. The biology and non-chemical control of dock species Rumex obtusifolious and Rumex crispus. Biological Agricultural and Horticulture: an international journal and Maun, M.A. Biography of Curly Dock. Weeds Today. Feb/March 1977, 14,19


Section 3: Distribution
Question 3.1 Ecological amplitude/Range? A Reviewed Scientific Publication

Moderate ecological amplitude


Sources of information:

Foster, L. The biology and non-chemical control of dock species Rumex obtusifolious and Rumex crispus. Biological Agricultural and Horticulture: an international journal and Maun, M.A. Biography of Curly Dock. Weeds Today. Feb/March 1977, 14,19


Question 3.2 Distribution/Peak frequency? A
Describe distribution:

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 No
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 Yes
Viable seed produced with both self-pollination and cross-pollination Unknown
Has quickly spreading vegetative structures (rhizomes, roots, etc.) that may root at nodes No
Fragments easily and fragments can become established elsewhere No
Resprouts readily when cut, grazed, or burned Yes
Total points: 5
Total unknowns: 2
Total score: B?

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
chaparralA, > 50%
Grasslands, Vernal Pools, Meadows, and other Herb Communitiescoastal prairieD, < 5%
valley and foothill grassland
Great Basin grasslandC, 5% - 20%
vernal poolB, 20% - 50%
meadow and seep
alkali playa
pebble plain
Bog and Marshbog and fenC, 5% - 20%
marsh and swamp
Riparian and Bottomland habitatriparian forestD, < 5%
riparian woodlandD, < 5%
riparian scrub (incl.desert washes)
Woodlandcismontane woodland
piñon and juniper woodland
Sonoran thorn woodland
Forestbroadleaved upland forest
North Coast coniferous forest
closed cone coniferous forest
lower montane coniferous forest
upper montane coniferous forest
subalpine coniferous forest
Alpine Habitatsalpine boulder and rock field
alpine dwarf scrub
Amplitude (breadth): A
Distribution (highest score): A

Infested Jepson Regions

Click here for a map of Jepson regions

  • ALL
  • CA Floristic Province
  • Cascade Range
  • Central West
  • Desert Province
  • Mojave Desert
  • Sonoran Desert
  • Great Basin Province
  • Great Valley
  • Modoc Plateau
  • Northwest
  • Sierra Nevada
  • Sierra Nevada East
  • Southwest