Plant Assessment Form

Limonium ramosissimum

Common Names: Algerian sea lavender

Evaluated on: 5/20/11

List committee review date:

Re-evaluation date:


Elizabeth Brusati, Science Program Manager
1442-A Walnut St. #462, Berkeley, CA 94709
Joseph M. DiTomaso, Specialist in Cooperative Extension
Dept. of Plant Sciences, University of California-Davis
Mail Stop 4, One Shields Ave., Davis CA 95616

No list committee members listed

General Comments

No general comments for this species

Table 2. Criteria, Section, and Overall Scores

Overall Score? Limited
Alert Status? No Alert
Documentation? 2.5 out of 5
Score Documentation
1.1 ?Impact on abiotic ecosystem processes D. Negligible Other Published Material
Four-part score DBUU Total Score
1.2 ?Impact on plant community B. Moderate Other Published Material
1.3 ?Impact on higher trophic levels U. Unknown
1.4 ?Impact on genetic integrity U. Unknown Other Published Material
2.1 ?Role of anthropogenic and natural disturbance in establishment C. Minor Other Published Material
Total Points
10 Total Score C
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 C. Low Other Published Material
2.6 ? Potential for natural long-distance dispersal B. Occasional Other Published Material
2.7 ?Other regions invaded D. Not known anywhere else
3.1 ?Ecological amplitude/Range
(see Worksheet C)
D. Narrow Other Published Material
Total Score D
3.2 ?Distribution/Peak frequency
(see Worksheet C)
D. Very low Observational

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 Other Published Material
Identify ecosystem processes impacted:

Sources of information:

<p>Archbald 2011</p>

Question 1.2 Impact on plant community composition,
structure, and interactions?
B Other Published Material
Identify type of impact or alteration:

Sources of information:

<p>Archbald 2011</p>

Question 1.3 Impact on higher trophic levels? U
Identify type of impact or alteration:


Sources of information:

Question 1.4 Impact on genetic integrity? U Other Published Material

<p>Unknown, but could impact native Limonium californicum. In their native range in the Mediterranean, Limonium species often hybridize.</p>

Sources of information:

<p>Hickman, 1993, Archbald 2011</p>

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

Sources of information:

<p>Archbald 2011</p>

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

<p>Populations are increasing in high marsh and ecotonal habitats in the San Francisco Estuary. Outreach and limited searches resulted in dozens of new populations recorded in San Francisco Estuary.</p>

Sources of information:

<p>Archbald 2011</p>

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

<p>Increasing somewhat but with local control efforts the populations are about static?</p>

Sources of information:

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

Sources of information:

<p>Archbald 2011</p>

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

<p>Sold at nurseries in the San Francisco Bay Area. Aquatic dispersal of seeds from horticultural plantings is possible but not widely planted.</p>

Sources of information:

<p>Archbald 2011</p>

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

<p>Seeds can float on tides and retain ability to germinate.</p>

Sources of information:

<p>Archbald 2011</p>

Question 2.7 Other regions invaded? D
Identify other regions:

<p>No known infestations elsewhere.</p>

Sources of information:

Section 3: Distribution
Question 3.1 Ecological amplitude/Range? D Other Published Material

Invades salt marshes in San Francisco Bay Area, also Carpinteria Marsh (Santa Barbara Co.), Orange County, Los Angeles County and San Diego County. Reported from SF Bay in 2006, from Santa Barbara area approximately 1994. ◓In its native range, LR grows in high salinity, low moisture conditions in the Western Mediterranean, including coastal cliff communities fed by salt spray and in saline dunal depressions.◝ (Archbald 2011). It appears to survive better in high marsh habitat or at the ledge of old levees than in the low marsh, pickleweed plain. Grows well in salt marshes but can also grow and germinate seeds in brackish or freshwater marshes.

Sources of information:

, Archbald 2011, Jepson Flora Project 2011

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

Scattered populations in several counties along the coast.

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 Yes
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 No
Fragments easily and fragments can become established elsewhere No
Resprouts readily when cut, grazed, or burned Yes
Total points: 6
Total unknowns: 2
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
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
Grasslands, Vernal Pools, Meadows, and other Herb Communitiescoastal prairie
valley and foothill grassland
Great Basin grassland
vernal pool
meadow and seep
alkali playa
pebble plain
Bog and Marshbog and fen
marsh and swampD, < 5%
Riparian and Bottomland habitatriparian forest
riparian woodland
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): D
Distribution (highest score): D

Infested Jepson Regions

Click here for a map of Jepson regions

  • Central West
  • Southwest