Sidalcea oregana ssp. hydrophila
Common Name: marsh checkerbloom
Family: Malvaceae
Element Code: PDMAL110K2
Full Name: Sidalcea oregana (T. & G.) Gray ssp. hydrophila (Heller) Hitchc.

Biology Glossary
Rarity Status Glossary
Occurrence Data from CDFW
California Natural Diversity Database Glossary
  • Total # of Known Element Occurrences: 35
  • Element Occurrence Ranks:
    A B C D X U
    4 0 1 0 1 29
  • Population Status:
    >20 yrs
    <=20 yrs
    28 7
  • Presence:
    Present Extant Possibly Extirpated Presumed Extirpated
    34 1 0
Notes Glossary
  • Intergrades with ssp. valida. See Muhlenbergia 1:107 (1904) for original description, and University of Washington Publications in Biology 18:1-96 (1957) for taxonomic treatment.
  • 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: 2010-03-15
Location Glossary
  • Elevation: 1100 - 2300 meters
  • California Endemic: yes
  • Other States:
  • California Counties and Islands:   name (code)
    Colusa (COL),  Glenn (GLE),  Lake (LAK),  Mendocino (MEN),  Napa (NAP)
  • Quads:   name (DWR code) USGS code
    St. Helena (516C) 3812254,  Detert Reservoir (517A) 3812265,  Clearlake Highlands (533B) 3812286,  Whispering Pines (533C) 3812276,  Kelseyville (534A) 3812287,  The Geysers (534D) 3812277,  St. John Mtn. (564B) 3912246,  Fouts Springs (564C) 3912236,  Crockett Peak (565A) 3912247,  Lake Pillsbury (565B) 3912248,  Elk Mountain (565C) 3912238,  Potato Hill (565D) 3912237,  Plaskett Meadows (581A) 3912267,  Plaskett Ridge (581B) 3912268,  Hull Mountain (581C) 3912258,  Kneecap Ridge (581D) 3912257,  Jamison Ridge (582B) 3912362,  Sanhedrin Mtn. (582D) 3912351,  Leech Lake Mtn. (598A) 3912381
  • 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. This data should NOT be substituted for pre-project review or for on-site surveys.
Presumed Extant Presumed Extirpated or Unknown 1780
Links to Leading Resources of Taxon Information
Suggested Citation
California Native Plant Society, Rare Plant Program. . Inventory of Rare and Endangered Plants of California (online edition, v8-03). Website [accessed ].

3812254=St. Helena (516C) 3812254;3812265=Detert Reservoir (517A) 3812265;3812286=Clearlake Highlands (533B) 3812286;3812276=Whispering Pines (533C) 3812276;3812287=Kelseyville (534A) 3812287;3812277=The Geysers (534D) 3812277;3912246=St. John Mtn. (564B) 3912246;3912236=Fouts Springs (564C) 3912236;3912247=Crockett Peak (565A) 3912247;3912248=Lake Pillsbury (565B) 3912248;3912238=Elk Mountain (565C) 3912238;3912237=Potato Hill (565D) 3912237;3912267=Plaskett Meadows (581A) 3912267;3912268=Plaskett Ridge (581B) 3912268;3912258=Hull Mountain (581C) 3912258;3912257=Kneecap Ridge (581D) 3912257;3912362=Jamison Ridge (582B) 3912362;3912351=Sanhedrin Mtn. (582D) 3912351;3912381=Leech Lake Mtn. (598A) 3912381