Taxon Report
Howellia aquatilis Graywater howellia |
 ©2018 John Doyen |
Classification
|
Scientific Name: |
Howellia aquatilis Gray |
|
Common Name: |
water howellia |
| Family: | Campanulaceae |
| Element Code: | PDCAM0A010 |
| USDA Plants Symbol: | HOAQ |
|
Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb (aquatic) |
| Blooming Period: Jun | Jun |
| Elevation: | 1085-1290 (3560-4230) |
| General Habitats: | Marshes and swamps |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 2B.2 |
| Global Rank: | G3 |
|
State Rank: |
S2 |
| State List: | None |
| Fed List: | FD |
| Other Status: | |
|
CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 7 |
| Element Occurrence Ranks: | |
| Excellent (A) | 2 |
| Good (B) | 2 |
| Fair (C) | 1 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 2 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Humboldt (HUM), Mendocino (MEN), Trinity (TRI) | |
| Quads: Name (Quad Code) | |
| Alderpoint (4012325), Black Lassic (4012335), Buck Rock (3912288), Fort Seward (4012326), Leech Lake Mtn. (3912381) | |
Threat List Data from the CNDDB
| Threat List Total: | 3 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 3 | 43 % | |
| Foot traffic/trampling | 1 | 14% |
| Non-native plant impacts | 1 | 14% |
| Other | 1 | 14% |
Notes
| Federally listed as threatened on 1994-08-15; Delisted due to Recovery on 2021-07-16. 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. Endangered in ID and OR, and state-listed as Threatened in WA. |
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Threats: |
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Threatened by hydrological alteration, grazing, and trampling. |
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Taxonomy: |
|
Inadvertently omitted from The Jepson Manual. |
Selected References
| Proceedings of the American Academy of Arts and Sciences 15:43 (1879) |
| Howellia aquatilis profile for potential Species of Conservation Concern evaluation (2018) |
| Recovery Plan for Howellia aquatilis (water howellia) (USFWS 1996) |
| Wasmann Journal of Biology 33:90-91 (1975) [CA record] |
| Conservation Biology 2(3):275-282 (1988) [Ecological information] |
| Fremontia 25:3 (1997) [Account of rediscovery] |
Citation
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 25 December 2024].