Taxon Report
Monotropa uniflora L.ghost-pipe |
 © 2021 Scot Loring |
Species Description:
Monotropa uniflora, commonly known as ghost-pipe, is a perennial herb (achlorophyllous) in the Ericaceae that is found in California and elsewhere. It occurs within Broadleafed upland forest, and North Coast coniferous forest, growing at elevations from 10 to 550 meters. Monotropa uniflora is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.
Classification
|
Scientific Name: |
Monotropa uniflora L. |
|
Common Name: |
ghost-pipe |
| Family: | Ericaceae |
| Element Code: | PDMON03030 |
| USDA Plants Symbol: | MOUN3 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb (achlorophyllous) |
| Blooming Period: Jun-Aug(Sep) | Jun-Aug(Sep) |
| Elevation: | 10-550 (35-1805) |
| General Habitats: | Broadleafed upland forest, North Coast coniferous forest |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 2B.2 |
| Global Rank: | G5 |
|
State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 117 |
| Element Occurrence Ranks: | |
| Excellent (A) | 2 |
| Good (B) | 28 |
| Fair (C) | 53 |
| Poor (D) | 16 |
| None (X) | 0 |
| Unknown (U) | 18 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Del Norte (DNT), Humboldt (HUM), Siskiyou (SIS) | |
| Quads: Name (Quad Code) | |
| Ah Pah Ridge (4112348), Arcata South (4012471), Blue Creek Mtn. (4112347), Childs Hill (4112461), Crescent City (4112472), Deadman Point (4112384), Dutch Creek (4112381), Eureka (4012472), Fern Canyon (4112441), High Divide (4112481), Hiouchi (4112471), Holter Ridge (4112338), Klamath Glen (4112358), Orick (4112431), Requa (4112451), Smith River (4112482), Trinidad (4112412) | |
Threat List Data from the CNDDB
| Threat List Total: | 11 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 102 | 87 % | |
| Logging | 84 | 71% |
| Foot traffic/trampling | 29 | 24% |
| Other | 28 | 23% |
| Road/trail construction/maint. | 24 | 20% |
| Erosion/runoff | 6 | 5% |
| Non-native plant impacts | 3 | 2% |
| Biocides | 3 | 2% |
| Development | 1 | 0% |
| Grazing | 1 | 0% |
| Recreational use (non-ORV) | 1 | 0% |
| Wood cutting or brush clearing | 1 | 0% |
Selected References
|
Monotropa uniflora profile for potential Species of Conservation Concern evaluation (2018) |
| 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 21 January 2025].