Taxon Report
Horkelia cuneata Lindl. var. puberula (Rydb.) Ertter & Revealmesa horkelia |
 © 2008 Tony Morosco |
Classification
|
Scientific Name: |
Horkelia cuneata Lindl. var. puberula (Rydb.) Ertter & Reveal |
|
Common Name: |
mesa horkelia |
| Family: | Rosaceae |
| Element Code: | PDROS0W045 |
| USDA Plants Symbol: | |
|
Synonyms/Other Names: |
|
Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Feb-Jul(Sep) | Feb-Jul(Sep) |
| Elevation: | 70-810 (230-2660) |
| General Habitats: | Chaparral, Cismontane woodland, Coastal scrub |
| Microhabitat: | Gravelly (sometimes), Sandy (sometimes) |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G4T1 |
|
State Rank: |
S1 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_CalBG/RSABG; USFS_S |
|
CRPR Changes: |
|
Occurrence Data from the CNDDB
| Total Occurrences: | 103 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 4 |
| Fair (C) | 2 |
| Poor (D) | 1 |
| None (X) | 24 |
| Unknown (U) | 72 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Los Angeles (LAX), Orange (ORA), Riverside (RIV)*, San Bernardino (SBD), San Diego (SDG)*, San Luis Obispo (SLO), Santa Barbara (SBA), Ventura (VEN) | |
| Quads: Name (Quad Code) | |
| Alberhill (3311764), Arroyo Grande NE (3512025)*, Atascadero (3512046)*, Azusa (3411728)*, Baldwin Park (3411718)*, Beaumont (3311688)*, Beverly Hills (3411814)*, Black Star Canyon (3311776), Burbank (3411823)*, Cabazon (3311687), Calabasas (3411826), Cambria (3512151), Canada Gobernadora (3311755), Casmalia (3412075), Cucamonga Peak (3411725), Cypress Mountain (3512058), Devore (3411724), Dos Pueblos Canyon (3411948), El Monte (3411811)*, Fontana (3411714)*, Gaviota (3412042), Glendora (3411727)*, Goleta (3411947), Guasti (3411715), Hollywood (3411813)*, Laguna Beach (3311757), Little Pine Mtn. (3411956), Lompoc (3412064), Lompoc Hills (3412054), Los Alamos (3412063), Los Angeles (3411812)*, Manzanita Mtn. (3412081), Matilija (3411943)*, Miranda Pine Mtn. (3512011), Morro Bay South (3512037), Mt. Wilson (3411821)*, Nipomo (3512014), Oceano (3512015), Ontario (3411716), Orcutt (3412074), Pala (3311731)*, Pasadena (3411822)*, Pechanga (3311741), Pismo Beach (3512026), Pitas Point (3411934), Point Dume (3411817), Port San Luis (3512027)*, Redondo Beach (3311874), Sacate (3412043), San Bernardino South (3411713)*, San Dimas (3411717)*, San Fernando (3411834), San Luis Obispo (3512036), San Marcos Pass (3411957)*, Santa Barbara (3411946), Santa Rosa Hills (3412053), Simi (3411837), Sisquoc (3412073), Sitton Peak (3311754), Solvang (3412052), Surf (3412065), Tar Spring Ridge (3512024), Templeton (3512056)*, Tranquillon Mtn. (3412055), Triunfo Pass (3411818), Twitchell Dam (3412083), Van Nuys (3411824), Venice (3311884), Waterman Mtn. (3411738), Wheeler Springs (3411953), White Ledge Peak (3411944), Zaca Creek (3412062) | |
Threat List Data from the CNDDB
| Threat List Total: | 7 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 45 | 44 % | |
| Development | 41 | 39% |
| Road/trail construction/maint. | 3 | 2% |
| Wood cutting or brush clearing | 2 | 1% |
| Mining | 2 | 1% |
| Non-native plant impacts | 1 | 0% |
| Other | 1 | 0% |
| Landfill | 1 | 0% |
Notes
| Many historical occurrences extirpated; need current information on status of occurrences. Possibly threatened by habitat conversion. Intergrades with other sspp.; populations representing true ssp. puberula declining. See Pittonia 1:102 (1887) for original description, and Lloydia 1:87-88 (1938) and Novon 17(3):315-325 (2007) for revised nomenclature. |
|
Threats: |
| Possibly threatened by habitat conversion. |
|
Taxonomy: |
|
ntergrades with other sspp.; populations representing true ssp. puberula |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 9 January 2025].