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Howellia aquatilis
Common Name: water howellia
Family: Campanulaceae
Element Code: PDCAM0A010
Full Name: Howellia aquatilis Gray

Biology Glossary
Rarity Status Glossary
Occurrence Data from CDFW
California Natural Diversity Database Glossary
  • Total # of Known Element Occurrences: 7
  • Element Occurrence Ranks:
    A B C D X U
    2 2 1 0 0 2
  • Population Status:
    >20 yrs
    <=20 yrs
    2 5
  • Presence:
    Present Extant Possibly Extirpated Presumed Extirpated
    7 0 0
Notes Glossary
  • Rediscovered in CA in 1996 by D. Isle and D. Efseaff. Previously known in CA from only a single collection near Howard Lake in 1928; where possibly extirpated by cattle grazing and trampling. Threatened by hydrological alteration, grazing, and trampling. Endangered in ID and OR, and state-listed as Threatened in WA. Inadvertently omitted from The Jepson Manual. See Proceedings of the American Academy of Arts and Sciences 15:43 (1879) for original description, Wasmann Journal of Biology 33:90-91 (1975) for the CA record, Conservation Biology 2(3):275-282 (1988) for ecological information, and Fremontia 25:3 (1997) for account of rediscovery.
  • 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: 2019-05-07
Location Glossary
  • Elevation: 1085 - 1290 meters
  • California Endemic: no
  • Other States: Idaho, Montana, Oregon, Washington
  • California Counties and Islands:   name (code)
    Humboldt (HUM),  Mendocino (MEN),  Trinity (TRI)
  • Quads:   name (DWR code) USGS code
    Buck Rock (597B) 3912288,  Leech Lake Mtn. (598A) 3912381,  Zenia (615B) 4012324,  Alderpoint (616A) 4012325,  Fort Seward (616B) 4012326,  Black Lassic (634D) 4012335
  • 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 920
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 http://www.rareplants.cnps.org [accessed ].

3912288=Buck Rock (597B) 3912288;3912381=Leech Lake Mtn. (598A) 3912381;4012324=Zenia (615B) 4012324;4012325=Alderpoint (616A) 4012325;4012326=Fort Seward (616B) 4012326;4012335=Black Lassic (634D) 4012335