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Rare And Endangered Plants, Torrey Pines State Natural Reserve Del Mar Manzanita Arctostaphylos glandulosa ssp. crassifolia CNPS 1B.1 S2 FE Nevin’s Barberry* Berberis nevinii CNPS 1B.1 S1 FE Orcutt’s Chorizanthe Chorizanthe orcuttiana CNPS 1B.1 S1 FE Orcutt’s Pincushion Chaenactis glabriuscula var. orcuttiana CNPS 1B.1 S1 Del Mar Sand Aster** Corethrogyne filaginifolia var. linifolia CNPS 1B.1 S1S2 Short-leaf Dudleya Dudleya brevifolia CNPS 1B.1 S1 False Golden Aster Heterotheca sessiliflora ssp. sessiliflora CNPS 1B.1 S1 Nuttall’s Acmispon (Lotus) Acmispon prostratus (Lotus nuttallianus) CNPS 1B.1 S1 Snake Cholla Cylindropuntia californica var. californica CNPS 1B.1 S1 Nuttall’s Scrub Oak Quercus dumosa CNPS 1B.1 S3 South Coast Saltscale Atriplex pacifica CNPS 1B.2 S2 Summer Holly Comarostaphylis diversifolia ssp. diversifolia CNPS 1B.2 S2 Knotweed Spineflower Chorizanthe polygonoides var. longispina CNPS 1B.2 S3 Decumbent Goldenbush Isocoma menziesii var. decumbens CNPS 1B.2 S2 Coast Woolly-Heads Nemacaulis denudata var. denudata CNPS 1B.2 S2 Torrey Pine Pinus torreyana ssp. torreyana CNPS 1B.2 S1 Estuary Sea-Blite Suaeda esteroa CNPS 1B.2 S2 Shaw’s Agave Agave shawii var. shawii CNPS 2B.1 S1.2 Coast Barrel Cactus Ferocactus viridescens CNPS 2B.1 S3 Golden-Spined Cereus Bergerocactus emoryi CNPS 2B.2 S2 Wart-stemmed Ceanothus Ceanothus verrucosus CNPS 2B.2 S2 Cliff Spurge Euphorbia misera CNPS 2B.2 S2 San Diego Marsh-Elder Iva hayesiana CNPS 2B.2 S2 Sea Dahlia Leptosyne maritima (Coreopsis maritima) CNPS 2B.2 S1 Ashy Spike-Moss Selaginella cinerascens CNPS 4.1 S3 Red Sand Verbena Abronia maritima CNPS 4.2 S3S4 San Diego Sagewort Artemisia palmeri CNPS 4.2 S3 Seaside Calandrinia Cistanthe maritima (Calandrinia maritima) CNPS 4.2 S3 Western Dichondra Dichondra occidentalis CNPS 4.2 S3S4 Palmer’s Grapplinghook Harpagonella palmeri CNPS 4.2 S3 Southwestern Spiny Rush Juncus acutus ssp. leopoldii CNPS 4.2 S4 California Box-thorn Lycium californicum CNPS 4.2 S4 California Spineflower Mucronea californica CNPS 4.2 S3 California Adder’s-Tongue Ophioglossum californicum CNPS 4.2 S4 Rein Orchid Piperia cooperi CNPS 4.2 S3 Woolly seablite Suaeda taxifolia CNPS 4.2 S4 Fillius, 2016 Rare And Endangered Plants, Torrey Pines State Natural Reserve Definitions: 1B. Rare, threatened or endangered in California and elsewhere. .1 Seriously endangered in California. .2 Fairly endangered in California. 2B. Rare, threatened or endangered in California but more common elsewhere. 4. Watch list, relatively rare and/or in threatened habitat. FE Federally Endangered. * Not native to the Torrey Pines State Reserve area. ** Subspecies not currently recognized, so listing not recognized. List 1A: Plants Presumed Extinct in California The plants of List 1A (less than 30 taxa) are presumed extinct because they have not been seen or collected in the wild in California for many years. Such a plant may still occur elsewhere in its range. List 1B: Plants Rare, Threatened, or Endangered in California and Elsewhere The plants of List 1B are rare throughout their range with the majority of them endemic to California. Most of the plants of List 1B have declined significantly over the last century. List 1B plants constitute the majority of the plants in CNPS’ Inventory with more than 1,000 plants assigned to this category of rarity. All of the plants constituting List 1B meet the definitions of Sec. 1901, Chapter 10 (Native Plant Protection Act) or Secs. 2062 and 2067 (California Endangered Species Act) of the California Department of Fish and Game Code, and are eligible for state listing. It is mandatory that they be fully considered during preparation of environmental documents relating to CEQA. List 2B: Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere Except for being common beyond the boundaries of California, the plants of List 2 would have appeared on List 1B. From the federal perspective, plants common in other states or countries are not eligible for consideration under the provisions of the Endangered Species Act. Until 1979, a similar policy was followed in California. However, after the passage of the Native Plant Protection Act, plants were considered for protection without regard to their distribution outside the state. List 3: Plants About Which We Need More Information - A Review List The plants that comprise List 3 are united by one common theme - we lack the necessary information to assign them to one of the other lists or to reject them. Nearly all of the plants remaining on List 3 are taxonomically problematic. List 4: Plants of Limited Distribution - A Watch List The plants in this category are of limited distribution or infrequent throughout a broader area in California, and their vulnerability or susceptibility to threat appears relatively low at this time. Threat Ranks The CNPS Threat Rank is an extension added onto the CNPS List and designates the level of endangerment by a 1 to 3 ranking, with 1 being the most endangered and 3 being the least endangered. A Threat Rank is present for all List 1B’s, List 2’s and the majority of List 3’s and List 4’s. STATE RANKING The State rank is the status throughout California. State (S-rank) ranks represent a letter+number score that reflects a combination of Rarity, Threat and Trend factors, with weighting being heavier on Rarity than the other two. Species or Natural Community Level: 1 = Critically Imperiled—At very high risk of extinction due to extreme rarity (often 5 or fewer populations), very steep declines, or other factors. 2 = Imperiled—At high risk of extinction due to very restricted range, very few populations (often 20 or fewer), steep declines, or other factors. 3 = Vulnerable—At moderate risk of extinction due to a restricted range, relatively few populations (often 80 or fewer), recent and widespread declines, or other factors. 4 = Apparently Secure—Uncommon but not rare; some cause for long-term concern due to declines or other factors. 5 = Secure—Common; widespread and abundant. Fillius, 2016 .

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