Micropus amphibolus
Common Name: Mt. Diablo cottonweed
Family: Asteraceae
Synonyms: Stylocline amphibola
Element Code: PDAST6D030
Full Name: Micropus amphibolus Gray
USDA PLANTS Symbol: MIAM3

Biology Glossary
  • Lifeform: annual herb
  • Blooming Period: March - May
  • Habitat: rocky.
    • Broadleafed upland forest
    • Chaparral
    • Cismontane woodland
    • Valley and foothill grassland
Rarity Status Glossary
Occurrence Data from DFG
California Natural Diversity Database Glossary
  • Total # of Known Element Occurrences:
  • Element Occurrence Ranks:
    A B C D X U
  • Population Status:
    Historic
    >20 yrs
    Recent
    <=20 yrs
  • Presence:
    Present Extant Possibly Extirpated Extirpated
Notes Glossary
  • Move to List 4? Can be confused with M. californicus. Many occurrences old; need current status information. Potentially threatened by vineyard development. See Proceedings of the American Academy of Arts and Sciences 17:214 (1882) for original description.
  • To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
  • Date Added: 1974-01-01
  • Last Update: 2010-11-15
Location Glossary
  • Elevation: 45 - 825 meters
  • California Endemic: yes
  • States: California
  • California Counties and Islands:   name (code)
    Alameda (ALA),  Contra Costa (CCA),  Colusa (COL),  Lake (LAK),  Monterey (MNT),  Marin (MRN),  Napa (NAP),  Santa Barbara (SBA),  Santa Clara (SCL),  Santa Cruz (SCR),  San Joaquin (SJQ),  San Luis Obispo (SLO),  Solano (SOL),  Sonoma (SON)
  • Quads:   name (DWR code) USGS code
    San Marcos Pass (168D) 34119E7,  Zaca Creek (169B) 34120F2,  Zaca Lake (194D) 34120G1,  San Miguel (293C) 35120G6,  Seaside (366D) 36121E7,  Soquel (387B) 36121H8,  Laurel (407C) 37121A8,  Davenport (408C) 37122A2,  Felton (408D) 37122A1,  San Jose East (427D) 37121C7,  Palo Alto (428B) 37122D2,  Cedar Mtn. (445D) 37121E5,  Walnut Creek (465A) 37122H1,  Briones Valley (465B) 37122H2,  Oakland East (465C) 37122G2,  San Quentin (466B) 37122H4,  San Francisco North (466C) 37122G4,  San Rafael (467A) 37122H5,  Bolinas (467B) 37122H6,  Cordelia (482B) 38122B2,  Petaluma River (484A) 38122B5,  Novato (484D) 38122A5,  Yountville (500A) 38122D3,  Sonoma (500C) 38122C4,  Glen Ellen (501D) 38122C5,  St. Helena (516C) 38122E4,  Mark West Springs (517C) 38122E6,  Calistoga (517D) 38122E5,  Geyserville (518B) 38122F8,  Kelseyville (534A) 38122H7,  Highland Springs (534B) 38122H8,  The Geysers (534D) 38122G7,  Wilbur Springs (547C) 39122A4,  Lucerne (549D) 39122A7
  • Notes:
      Definitions of codes preceding a county and/or quad:
      * Presumed extirpated
      ? Uncertain about distribution or identity
      ?* Uncertain about distribution, but presumed extirpated if once present
      (?) Occurrence confirmed, but possibly extirpated
      Species may be present in other areas where conditions are favorable.
Quad data is not available for all List 3 and 4 plants. For those that do contain this data, it has not been quality controlled and is potentially incomplete, inaccurate, and/or out of date. Please use caution when referencing this information. We are currently working hard to maintain this data and hope to provide accurate and up to date information in the near future.
Presumed Extant Presumed Extirpated or Unknown 1507
Links to Leading Resources of Taxon Information
Suggested Citation
CNPS, Rare Plant Program. . Inventory of Rare and Endangered Plants (online edition, v8-02). California Native Plant Society, Sacramento, CA. Website http://www.rareplants.cnps.org [accessed ].
-121.5,37.5

CA
34119E7=San Marcos Pass (168D) 34119E7;34120F2=Zaca Creek (169B) 34120F2;34120G1=Zaca Lake (194D) 34120G1;35120G6=San Miguel (293C) 35120G6;36121E7=Seaside (366D) 36121E7;36121H8=Soquel (387B) 36121H8;37121A8=Laurel (407C) 37121A8;37122A2=Davenport (408C) 37122A2;37122A1=Felton (408D) 37122A1;37121C7=San Jose East (427D) 37121C7;37122D2=Palo Alto (428B) 37122D2;37121E5=Cedar Mtn. (445D) 37121E5;37122H1=Walnut Creek (465A) 37122H1;37122H2=Briones Valley (465B) 37122H2;37122G2=Oakland East (465C) 37122G2;37122H4=San Quentin (466B) 37122H4;37122G4=San Francisco North (466C) 37122G4;37122H5=San Rafael (467A) 37122H5;37122H6=Bolinas (467B) 37122H6;38122B2=Cordelia (482B) 38122B2;38122B5=Petaluma River (484A) 38122B5;38122A5=Novato (484D) 38122A5;38122D3=Yountville (500A) 38122D3;38122C4=Sonoma (500C) 38122C4;38122C5=Glen Ellen (501D) 38122C5;38122E4=St. Helena (516C) 38122E4;38122E6=Mark West Springs (517C) 38122E6;38122E5=Calistoga (517D) 38122E5;38122F8=Geyserville (518B) 38122F8;38122H7=Kelseyville (534A) 38122H7;38122H8=Highland Springs (534B) 38122H8;38122G7=The Geysers (534D) 38122G7;39122A4=Wilbur Springs (547C) 39122A4;39122A7=Lucerne (549D) 39122A7