Taxon Details
Castilleja ambigua var. humboldtiensis
Humboldt Bay owl's-clover
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©2017 Steve Matson |
©2017 Steve Matson |
Taxon Summary:
Castilleja ambigua var. humboldtiensis, commonly known as Humboldt Bay owl's-clover, is a annual herb (hemiparasitic) in the Orobanchaceae that is found only in California. It occurs within Marshes and swamps, growing at elevations from 0 to 3 meters. Castilleja ambigua var. humboldtiensis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
Scientific Name: Castilleja ambigua (Hook. & Arn.) T.I. Chuang & Heckard var. humboldtiensis (D.D. Keck) J.M. Egger |
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Common Name: Humboldt Bay owl's-clover |
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| Family: | Orobanchaceae | |
| Element Code: | PDSCR0D402 | |
| USDA Plants Symbol: | ||
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Synonyms/Other Names: |
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| Name Status: |
JEF, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 1B.2 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G5T2 |
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State Rank: |
S2 |
| Other Status: | BLM_S; SB_UCBG |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2024-08-06 |
| Lifeform: annual herb (hemiparasitic) | ||||||||||||||
Blooming Period: Apr-Aug
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Elevation:
0 - 3 meters 0 - 10 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
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Microhabitat:
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Notes: Threatened by coastal development and non-native plants. See C. ambigua ssp. humboldtiensis in TJM 2. See Proceedings of the American Academy of Arts and Sciences IV 16:536 (1927) for original description, Phytologia 90(1):63-82 (2008) for revised nomenclature, and Madroño 45(4):326 for distribution information. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 12 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 17 | 55 % |
| THREAT LIST: | ||
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| Development | 7 | 22% |
| Foot traffic/trampling | 6 | 19% |
| Non-native plant impacts | 4 | 12% |
| Other | 4 | 12% |
| Grazing | 3 | 9% |
| Altered flood/tidal/hydrologic regime | 3 | 9% |
| Agriculture | 2 | 6% |
| Road/trail construction/maint. | 2 | 6% |
| Waterway bank protection/maintenance | 2 | 6% |
| Surface water diversion | 1 | 3% |
| Recreational use (non-ORV) | 1 | 3% |
| ORV activity | 1 | 3% |
| Total Occurrences: | 31 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 5 | 11 | 4 | 0 | 0 | 11 |
| Occurrence Status: | |||||
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| Historical >20 Years | 22 | ||||
| Recent <=20 Years | 9 | ||||
| Presence: | |||||
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| Presumed Extant | 31 | ||||
| Possibly Extirpated | 0 | ||||
| Presumed Extirpated | 0 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Humboldt (HUM), Marin (MRN), Mendocino (MEN) |
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Quads: Name (Quad Code) Arcata North (4012481), Arcata South (4012471), Cannibal Island (4012463), Eureka (4012472), Ferndale (4012453), Fields Landing (4012462), Inverness (3812217), Mendocino (3912337), Point Arena (3812386), Rodgers Peak (4112421), Tomales (3812228), Trinidad (4112412), Tyee City (4012482) |
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Notes:
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Presumed Extant
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