Observation  Detail   we336 
 
Plant Name   Petasites fragrans   Winter heliotrope
Date 2011-03-01
Observer Mike Perlmutter     (PROFILE)
Source:Michael Perlmutter, BAEDN
Natural Status wild
County Contra Costa
Coordinates 37.89386,-122.24643: LOCATION CLOSEUP   
Elevation 288 meters
Location Tilden Regional Park, East Bay Regional Park District (EBRPD), Anza View Drive (small 1-way loop road starting at Tilden Botanic Garden), second turnout, about half way along loop.
Notes This seems to be the first California and US wildland record of this species. A sample taken by Contra Costa Ag (CDFA-PDR#1645122 - Niang D) was identified by CDFA botanist Dean Kelch who will voucher the specimen in the CDFA herbarium. Tilden gardener Martha Wing, pointed this out about a year ago to Friends of Five Creeks, when it was thought to be half the current size. Seems like it was established from dumped garden waste. Spreads by rhizomes, excludes everything else. Friends of 5 Creeks (FC5) began removal work March 1, 2011. About half the area was hand-removed, although many roots might remain. Part of leading edge was tarped. F5C would like to conduct a trial to compare efficacy of hand-removal, herbicide, and tarping. Susan Schwartz of F5C will coordinate future removal work with EBRPD.
Habitat Open Woodland
Gross Area 60 Square Feet
Number of Plants 1+Phenology Mature
Group AssociationEarly Detection Network
Location Quality HIGHWhat Grows Here? (at this location)
Location Accuracy 10  square meters
Calflora ID we336 View this record in  
Plant Observation Entry
Added to Calflora 2011-03-02
Documentation Reported; there is not a voucher specimen for this observation.
Type incidental observation

For more information about this record, please contact the observer(s) or source institution(s) mentioned above.




Photo © 2011
Michael Perlmutter


Upper and undersides of leaves

© 2011
Michael Perlmutter


leaf margin

© 2011
Michael Perlmutter


Rhizomes

© 2011
Michael Perlmutter


leaves with foot for scale

© 2011
Michael Perlmutter


ground-cover

© 2011
Michael Perlmutter


flower early

© 2011
Michael Perlmutter


Flower

© 2011
Michael Perlmutter


Flower

© 2011
Michael Perlmutter


leaves

© 2011
Michael Perlmutter


removal by Friends of 5 Creeks volunteers

© 2011
Michael Perlmutter
    Note that Calflora presents observation data from diverse sources. Some records may be multiple observations of the same plant populations or duplicate reports from different sources. Please carefully review data for your particular application.

    Suggested Citation
    Calflora: Information on California plants for education, research and conservation. [web application]. 2014. Berkeley, California:
    The Calflora Database [a non-profit organization].
    Available: http://www.calflora.org/   (Accessed: Oct 24, 2014).

    Please acknowledge contributors, both institutions and individual observers, mentioned above.

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