Taxon Details
Quercus tomentella
island oak
View Report Copy LinkCalfloraeFloraCCHCalPhotosiNaturalist |
Taxon Summary:
Quercus tomentella, commonly known as island oak, is a perennial evergreen tree in the Fagaceae that is found in California and elsewhere. It occurs within Chaparral, Cismontane woodland, Closed-cone coniferous forest, and Riparian woodland, growing at elevations from 15 to 730 meters.Quercus tomentella is ranked4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.| Scientific Name: Quercus tomentella Engelm. | ||
| Common Name: island oak | ||
| Family: | Fagaceae | |
| Element Code: | PDFAG05250 | |
| USDA Plants Symbol: | QUTO | |
| Synonyms/Other Names: | ||
| Name Status: | JEF, FNA,POWO, IPNI,Tropicos | |
| CA Rare Plant Rank: | 4.2 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G3G4 |
| State Rank: | S3S4 |
| Other Status: | IUCN_EN; SB_CRES |
| CRPR Changes: | |
| Add Date: | 1974-01-01 |
| Date Edited: | 2022-12-06 |
| Lifeform: perennial evergreen tree | ||||||||||||||
Blooming Period: Mar-Jul
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| Elevation: 15 - 730 meters 50 - 2395 feet | ||||||||||||||
General Habitats:
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| Microhabitat Details: | ||||||||||||||
| Microhabitat: | ||||||||||||||
| Notes: Threatened by trampling, erosion, grazing, feral herbivores, and introgression. Hybridizes withQ. chrysolepis except on SRO and GU islands. Populations on GU Isl. have declined dramatically in recent years. SeeTransactions of the Academy of Science of St. Louis 3:393 (1877) for original description. | |
| Threats: | |
| Taxonomy: | |
| Threat List Total: | 0 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 0 | 0 % |
| THREAT LIST: | ||
|---|---|---|
| Total Occurrences: | 0 | ||||
| Element Occurrence Ranks: | |||||
|---|---|---|---|---|---|
| A | B | C | D | X | U |
| 0 | 0 | 0 | 0 | 0 | 0 |
| Occurrence Status: | |||||
|---|---|---|---|---|---|
| Historical >20 Years | 0 | ||||
| Recent<=20 Years | 0 | ||||
| Presence: | |||||
|---|---|---|---|---|---|
| Presumed Extant | 0 | ||||
| Possibly Extirpated | 0 | ||||
| Presumed Extirpated | 0 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
| States:Name (Code) California (CA), Isla Guadalupe, Baja (GU) | |||||||||||||
| California Counties and Islands:Name (Code) Los Angeles (LAX), Santa Barbara (SBA), Ventura (VEN) | |||||||||||||
| Quads:Name (Quad Code) Anacapa Island (3311983), San Clemente Island Central (3211874), San Clemente Island North (3211885), San Clemente Island South (3211873), Santa Catalina East (3311833), Santa Catalina South (3311834), Santa Cruz Island A (3311987), Santa Cruz Island B (3311986), Santa Cruz Island C (3311985), Santa Rosa Island North (3312081), Santa Rosa Island South (3312071) | |||||||||||||
Notes:
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Presumed ExtantClick on quad for name. Hold Shift Key to use mouse scroll wheel
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Suggested Citation:
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 11 May 2025].