Taxon Report
Montia howellii Wats.Howell's montia |
 © 2004 Dean Wm. Taylor |
Classification
|
Scientific Name: |
Montia howellii Wats. |
|
Common Name: |
Howell's montia |
| Family: | Montiaceae |
| Element Code: | PDPOR05070 |
| USDA Plants Symbol: | MOHO |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: (Feb)Mar-May | (Feb)Mar-May |
| Elevation: | 0-835 (0-2740) |
| General Habitats: | Meadows and seeps, North Coast coniferous forest, Vernal pools |
| Microhabitat: | Roadsides (sometimes), Vernally Mesic |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 2B.2 |
| Global Rank: | G3G4 |
|
State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 123 |
| Element Occurrence Ranks: | |
| Excellent (A) | 11 |
| Good (B) | 55 |
| Fair (C) | 32 |
| Poor (D) | 12 |
| None (X) | 6 |
| Unknown (U) | 7 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Del Norte (DNT), Humboldt (HUM), Trinity (TRI) | |
| Quads: Name (Quad Code) | |
| Arcata North (4012481), Arcata South (4012471), Bald Hills (4112328), Blocksburg (4012336), Briceland (4012318)*, Bridgeville (4012347), Broken Rib Mtn. (4112386), Buckeye Mtn. (4012432), Bull Creek (4012431), Capetown (4012443), Eureka (4012472), Ferndale (4012453), Fields Landing (4012462), Fort Seward (4012326), Fortuna (4012452), French Camp Ridge (4112327), Harris (4012316), Hennessy Peak (4012375), High Divide (4112481), Hupa Mountain (4112317), Hydesville (4012451), Iaqua Buttes (4012368), Ironside Mtn. (4012374), Korbel (4012378), Larabee Valley (4012346), Lord-ellis Summit (4012387), Mad River Buttes (4012367), Maple Creek (4012377), McWhinney Creek (4012461), Miranda (4012327)*, Myers Flat (4012337), Orick (4112431), Owl Creek (4012358), Panther Creek (4112318), Redcrest (4012348), Salyer (4012385)*, Scotia (4012441), Taylor Peak (4012442), Weitchpec (4112326), Willow Creek (4012386), Yager Junction (4012357) | |
Threat List Data from the CNDDB
| Threat List Total: | 14 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 109 | 89 % | |
| Road/trail construction/maint. | 87 | 70% |
| Logging | 79 | 64% |
| Other | 30 | 24% |
| Grazing | 15 | 12% |
| Foot traffic/trampling | 14 | 11% |
| Non-native plant impacts | 12 | 9% |
| ORV activity | 11 | 8% |
| Altered flood/tidal/hydrologic regime | 6 | 4% |
| Surface water diversion | 5 | 4% |
| Wood cutting or brush clearing | 3 | 2% |
| Vandalism/dumping/litter | 2 | 1% |
| Biocides | 2 | 1% |
| Erosion/runoff | 2 | 1% |
| Recreational use (non-ORV) | 2 | 1% |
Notes
| Rediscovered in CA in 1999 by Clare Golec. Did plant occur in DNT Co.? Candidate for state listing in OR. |
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Threats: |
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Threatened by logging, road construction, road maintenance, vehicles, and competition. Possibly threatened by non-native plants. |
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Taxonomy: |
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Sometimes mistaken for M. fontana or M. dichotoma. |
Selected References
| Proposed Change from California Rare Plant Rank 2 to 4.2 |
| Proposed Change from California Rare Plant Rank 2B.2, G3G4 / S2 to 4.3, G4 / S3 |
|
Proceedings of the American Academy of Arts and Sciences 18:191 (1883) |
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Montia howellii profile for potential Species of Conservation Concern evaluation (2022) |
| USFS Potential Species of Conservation Concern Profile |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 4 January 2025].