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SAMO2421
» Citation URL: http://vegbank.org/cite/urn:lsid:vegtwig.vegbank.org:observation:4425-{8DD83952-09D2-4939-9225-C48011373615}
» Citing info
Plot ID Fields: 
Author Plot Code ? SAMO2421
Author Observation Code ? SAMO2421
Original Data Location ? SAMO NPS Headquarters, 401 West Hillcrest Drive, Thousand Oaks, CA
Location Fields: MAP: Google | Yahoo | TopoZone | MapQuest
Confidentiality Status ? exact location
Latitude ? 34.1141320462997 º
Longitude ? -118.712519032889 º
Author Location ? Malibu Creek State Park
Location Narrative ? There is an observation form about this polygon but came back for Rapid Assessment because it’s a unique type. Only includes blue-green parts on photo and surrounding Silybum marianum. Grey-brown area surrounding green is nearly pure Silybum marianum, not included in assessment. Center of polygon is nearly pure Leymus triticoides. In alluvial, flattish area. Silybum patchy. Polygon extends off of map to S. VERY dense cover. Largest Leymus triticoides patch seen so far. Coyote skull in polygon.
State or Province ? California
Country ? United States
Named Places
region|state|province: California
area|country|territory: United States
Layout Fields: 
Shape ? Plotless
Placement Method ? Representative
Permanence ? not permanent
Environment Fields: 
Stand Size ? large
Elevation ? 224 m
Slope Aspect ? 110 º
Min Slope Gradient ? 1 º
Max Slope Gradient ? 5 º
Topographic Position ? Lower 1/3 of slope
Surficial Deposits ? Silty alluvium
Rock Type ? Silty alluvium
Landscape Narrative ? Upland;
Percent Rock / Gravel ? 0 %
Percent Litter ? 90 %
Percent Bare Soil ? 0 %
Methods Fields: 
Observation Start Date ? 02-Oct-2003 ± exact
Date Accuracy ? exact
Project ? SAMO (CNPS Rapid Assessment/Releve 2002)
Cover Method ? Percentage (%)
Stratum Method ? CA Native Plant Society (CNPS)
Cover Dispersion ? Entire
Overall Taxon Cover Values are Automatically Calculated? ? no
Plot Quality Fields: 
Plot Validation Level ? (1) occurrence plot: sufficient for determining type occurrence
Overall Plot Vegetation Fields: 
Field Height ? 0.25 m
Tree Cover ? 0 %
Shrub Cover ? 0.2 %
Field Cover ? 80 %
Nonvascular Cover ? 0 %
Misc Fields: 
Observation Narrative ? original plot ID: rap2421, Vegetation type confidence High;
Taxa occurring on this plot-observation
Change plant label:
Change Strata Shown:
ord Author Plant Name ?Original Interpretation, full Scientific Name ?Original Interpretation, Scientific Name without authors ?Original Interpretation, Common Name ?Original Interpretation, USDA Code ?Current Interpretation, full Scientific Name ?Current Interpretation, Scientific Name without authors ?Current Interpretation, Common Name ?Current Interpretation, USDA Code ? Stratum ?Cover ?Original Cover Code ?Basal Area ?Biomass ?Inference Area ? Stems: Stem Diameters (graphically):
1 Leymus triticoides Leymus triticoides (Buckley) Pilg. Leymus triticoides Leymus triticoides **   LETR5 Leymus triticoides (Buckley) Pilg. Leymus triticoides Leymus triticoides **   LETR5 Medium
70 %
        -none-
2 Sonchus oleraceus Sonchus oleraceus L. Sonchus oleraceus Sonchus oleraceus **   SOOL Sonchus oleraceus L. Sonchus oleraceus Sonchus oleraceus **   SOOL Medium
10 %
        -none-
3 Sambucus mexicana Sambucus mexicana C. Presl ex DC. Sambucus mexicana Sambucus mexicana **   SAME5 Sambucus mexicana C. Presl ex DC. Sambucus mexicana Sambucus mexicana **   SAME5 Medium
0.2 %
        -none-
4 Baccharis salicifolia Baccharis salicifolia (Ruiz & Pav.) Pers. Baccharis salicifolia Baccharis salicifolia **   BASA4 Baccharis salicifolia (Ruiz & Pav.) Pers. Baccharis salicifolia Baccharis salicifolia **   BASA4 Medium
0.2 %
        -none-
5 Cirsium vulgare Cirsium vulgare (Savi) Ten. Cirsium vulgare Cirsium vulgare **   CIVU Cirsium vulgare (Savi) Ten. Cirsium vulgare Cirsium vulgare **   CIVU Medium
0.2 %
        -none-
6 Silybum marianum Silybum marianum (L.) Gaertn. Silybum marianum Silybum marianum **   SIMA3 Silybum marianum (L.) Gaertn. Silybum marianum Silybum marianum **   SIMA3 Medium
0.2 %
        -none-
7 Baccharis pilularis Baccharis pilularis DC. Baccharis pilularis Baccharis pilularis **   BAPI Baccharis pilularis DC. Baccharis pilularis Baccharis pilularis **   BAPI Medium
0.2 %
        -none-
8 Phalaris aquatica Phalaris aquatica L. Phalaris aquatica Phalaris aquatica **   PHAQ Phalaris aquatica L. Phalaris aquatica Phalaris aquatica **   PHAQ Medium
0.2 %
        -none-
9 Brassica nigra Brassica nigra (L.) W.D.J. Koch Brassica nigra Brassica nigra **   BRNI Brassica nigra (L.) W.D.J. Koch Brassica nigra Brassica nigra **   BRNI Medium
0.2 %
        -none-
10 Lactuca serriola Lactuca serriola L. Lactuca serriola Lactuca serriola **   LASE Lactuca serriola L. Lactuca serriola Lactuca serriola **   LASE Medium
0.2 %
        -none-
11 Rumex crispus Rumex crispus L. Rumex crispus Rumex crispus **   RUCR Rumex crispus L. Rumex crispus Rumex crispus **   RUCR Low
0.2 %
        -none-
12 Asclepias fascicularis Asclepias fascicularis Decne. Asclepias fascicularis Asclepias fascicularis **   ASFA Asclepias fascicularis Decne. Asclepias fascicularis Asclepias fascicularis **   ASFA Low
0.2 %
        -none-
13 Bromus diandrus Bromus diandrus Roth Bromus diandrus Bromus diandrus **   BRDI3 Bromus diandrus Roth Bromus diandrus Bromus diandrus **   BRDI3 Low
0.2 %
        -none-
This table is SORTABLE. Click the headers to sort ascending and descending.

Stratum Definitions:
Stratum Type ?Stratum Base ?Stratum Height ?Stratum Cover ?
conifer tree     0 %
hardwood tree     0 %
Medium 0.5 m 5 m  
Low 0 m 0.5 m  
Low-Mid Shrub 1 m 2 m  
Low Tree-Tall Shrub      
This table is SORTABLE. Click the headers to sort ascending and descending.
Observation Contributors:
Party ?Role ?
Hohn, Charlie Field assistant
McGraw, Mike Field assistant
Community Classification:
More Classification Start Date ? Community AssignmentsContributors
Details 01-Jun-2004
Community Concept ?Class Fit ?Class Confidence ?Community Authority Reference ?Typal ?
Leymus triticoides Alliance     Keeler-Wolf and Evens 2006 no
Keeler-Wolf, Todd
Evens, Julie


Disturbance Data:
Disturbance Type ?Disturbance Intensity ?Disturbance Comment ?
Competition from exotics Medium Competition from exotics
Vandalism/dumping/litter Low Vandalism/dumping/litter


User Defined Values
No User Defined Data for this plot