Species Details
Polygonum hickmanii
Scotts Valley polygonum
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Species Description:
Polygonum hickmanii, commonly known as Scotts Valley polygonum, is a annual herb in the Polygonaceae that is found only in California. It occurs within Valley and foothill grassland (mudstone, and sandstone), growing at elevations from 210 to 250 meters. Polygonum hickmanii is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.|
Scientific Name: Polygonum hickmanii H.R. Hinds & R. Morgan |
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Common Name: Scotts Valley polygonum |
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| Family: | Polygonaceae | |
| Element Code: | PDPGN0L310 | |
| USDA Plants Symbol: | POHI14 | |
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Synonyms/Other Names: |
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| Name Status: |
JEP, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 1B.1 |
| Fed List: | FE (2003-04-08) |
| State List: | CE (2004-10-01) |
| Global Rank: | G1 |
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State Rank: |
S1 |
| Other Status: | |
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CRPR Changes: |
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| Add Date: | 2001-01-01 |
| Date Edited: | 2021-05-26 |
| Lifeform: annual herb | ||||||||||||||
Blooming Period: May-Aug
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Elevation:
210 - 250 meters 690 - 820 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
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Microhabitat:
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| Threat List Total: | 8 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 2 | 100 % |
| THREAT LIST: | ||
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| Development | 2 | 100% |
| Non-native plant impacts | 2 | 100% |
| Other | 2 | 100% |
| Road/trail construction/maint. | 1 | 50% |
| Altered flood/tidal/hydrologic regime | 1 | 50% |
| ORV activity | 1 | 50% |
| Erosion/runoff | 1 | 50% |
| Insufficient population/stand size | 1 | 50% |
| Total Occurrences: | 2 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 0 | 1 | 0 | 1 | 0 | 0 |
| Occurrence Status: | |||||
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| Historical >20 Years | 0 | ||||
| Recent <=20 Years | 2 | ||||
| Presence: | |||||
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| Presumed Extant | 2 | ||||
| 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) Santa Cruz (SCR) |
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Quads: Name (Quad Code) Felton (3712211), Laurel (3712118) |
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Notes:
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Presumed Extant
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