SPECIES: Scientific [common] Calochortus nitidus (broad-fruit mariposa lily) Forest: Salmon-Challis National Forest Forest Reviewer: Brittni Brown; John Proctor Date of Review: 20 February 2018; 25 March 2018 Forest concurrence (or YES recommendation if new) for inclusion of species on list of potential SCC: (Enter Yes or No) FOREST REVIEW RESULTS: 1. The Forest concurs or recommends the species for inclusion on the list of potential SCC: Yes_X__ No___ 2. Rationale for not concurring is based on (check all that apply): Species is not native to the plan area _______ Species is not known to occur in the plan area _______ Species persistence in the plan area is not of substantial concern _______ FOREST REVIEW INFORMATION: 1. Is the Species Native to the Plan Area? Yes_ X_ No___ If no, provide explanation and stop assessment. 2. Is the Species Known to Occur within the Planning Area? Yes_X_ No___ If no, stop assessment. Table 1. All Known Occurrences, Years, and Frequency within the Planning Area Year Number of Location of Observations (USFS Source of Information Observed Individuals District, Town, River, Road Intersection, HUC etc.) 2010 26 to 75 Challis National Forest: Pioneer Rocky Mountain Herbarium Mountains: upper valley of NID: 1352801 Boulder Creek, 13.5 air miles EO 1 northeast of Sun Valley. Lost River Ranger District 2010 1 Salmon National Forest: Rocky Mountain Herbarium Beaverhead Mountains: Grizzly NID: 1352802 Hill, within 100 to 200 yards off EO 2 Continental Divide, just off of Forest Road 3906. Leadore Ranger District a. Are all Species Occurrences Only Accidental or Transient? Yes___ No_X_ If yes, document source for determination and stop assessment. b. For species with known occurrences on the Forest since 1990, based on the number of observations and/or year of last observation, can the species be presumed to be established or becoming established in the plan area? Yes_X_ No___ If no, provide explanation and stop assessment c. For species with known occurrences on the Forest predating 1990, does the weight of evidence suggest the species still occurs in the plan area? Yes___ No___ Provide explanation for determination If determination is no, stop assessment Not applicable. Known occurrences since 1990. d. Map 1, Broad-fruit mariposa lily conservation status in US and Canada (NatureServe 2017) NatureServe. 2017. Conservation Species Report. Calochortus nitidus. Internet Website. http://explorer.natureserve.org. Accessed on October 18, 2017. e. Map 2, Broad-fruit mariposa lily in Idaho and surrounding state and provinces. NRCS (United States Department of Agriculture, Natural Resources Conservation Service). 2017. Plants Profile for Calochortus nitidus. Internet website: https://plants.usda.gov/core/profile?symbol=CANI. Accessed on October 26, 2017. f. Map 3, Broad-fruit mariposa lily occurrences on the Salmon-Challis National Forest (Idaho Department of Fish and Game. Idaho Fish and Wildlife Information System, Species Diversity Database, Idaho Natural Heritage Data. Accessed February 27, 2017) 3. Is There Substantial Concern for the Species’ Capability to persist Over the Long-term in the Plan Area Based on Best Available Scientific Information? Table 2. Status summary based on existing conservation assessments Entity Status/Rank (include definition if Other) Global Rank G3 – 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)1 State Rank S3 – Vulnerable (Vulnerable in the state due to a restricted range, relatively few populations (often 80 or fewer), recent and widespread declines, or other factors making it vulnerable to extirpation)1 USDA Forest Region 1: Clearwater and Nez Perce National Forests (Known)2 Service Region 4: Not listed3 USDI FWS Not listed as a candidate species4 Other Idaho Native Plant Society: G3S3 RARE5 BLM: Not listed6 1. Idaho Natural Heritage Program. 2016. IDNHP Tracked Plant Species 2016. On file. Accessed January 12, 2018 2. USFS Region 1. 2011. 2011 Sensitive Species List Idaho and Montana. Website: http://fsweb.r1.fs.fed.us/wildlife/wwfrp/TESnew.htm. Accessed January 10, 2017. 3. USFS Region 4. 2016. Proposed, Endangered, Threatened, and Sensitive Species List. On file. Accessed January 11, 2017. 4. USFWS. 2017. Candidate species believed to or known to occur in Idaho. Website: https://ecos.fws.gov/ecp0/reports/species-listed-by-state-report?state=ID&status=candidate. Accessed January 12, 2018. 5. Idaho Native Plant Society. 2016. INPS Rare Plant List May 2016. https://idahonativeplants.org/rare-plants-list/ Accessed January 10, 2018. 6. BLM. 2016. Bureau of Land Management Idaho Special Status Plants List Aug 2016. On file. Accessed 15 January, 2018. Table 3. Status summary based on best available scientific information. Species (Scientific and Common Name): Calochortus nitidus (broad-fruit mariposa lily) Criteria Rank Rationale Literature Citations 1 B1 This species is known from two populations on the Forest and occurs in Mancuso, M. 1996. Report on the Distribution on the Leadore and Lost River Ranger Districts (RMH 2017). The range of conservation status of Calochortus Salmon-Challis Calochortus nitidus in Idaho has been delineated. Within this range, new nitidus. Internet website: National Forest populations or extensions of known populations will probably continue https://idfg.idaho.gov/ifwis/idnhp/cdc to be periodically found (Mancuso 1996). Habitat for this species (see _pdf/mancm96a.pdf. Accessed on October 26, 2017. Criterion 6) exists primarily as patches, some of which are small or isolated to the degree that species interactions are limited by Rocky Mountain Herbarium. 2017. movements between patches (Rank B1). Confidence in this rank is Calochortus nitidus. Internet website: medium as there is only two population on the Forest to assess habitat http://rmh.uwyo.edu/. Accessed on for. October 26, 2017. Confidence in Rank: High, Medium, or Low 2 B This species occurs in Oregon, Washington, and Idaho. The majority of Consortium of Pacific Northwest Distribution in the 49 occurrences listed by CPNWH occur in Idaho along the Herbaria. 2017. Calochortus nitidus. surrounding Washington and Oregon border (CPNWH 2017; Mancuso 1996). The Internet website: geographic area nearest population to the Forest occurs seven miles northeast of Tendoy, http://www.pnwherbaria.org/. ID along Forest Service Road 185 approximately 0.3 miles from the edge Accessed on October 26, 2017. of the Forest boundary. Mancuso, M. 1996. Report on the conservation status of Calochortus As this species occurs in three states, C. nitidus is determined to have a nitidus. Internet website: moderate distribution outside of the SCNF (Rank B). Confidence in this https://idfg.idaho.gov/ifwis/idnhp/cdc rank is high as there are multiple records confirming occurrences outside _pdf/mancm96a.pdf. Accessed on SCNF. October 26, 2017. Confidence in Rank: High, Medium, or Low Species (Scientific and Common Name): Calochortus nitidus (broad-fruit mariposa lily) Criteria Rank Rationale Literature Citations 3 B The dispersal mechanism for this species has not been studied. There are Caicco, S. 1988. Preliminary results of Dispersal no apparent morphological adaptations for specialized capsule or seed an investigation into the life history Capability dispersal. Seeds may be wind dispersed, but as Caicco (1988) points out, and population dynamics of data are lacking. The mean seed weight in C. nitidus is lighter than any of Calochortus nitidus Dougl. (Liliaceae). the Californian species; which may be an asset to seed dispersal by wind Unpublished report on file at: Idaho Department of Fish and Game, (Caicco 1988). Gravity has also been suggested as playing a role in Conservation Data Center, Boise, ID. dispersal of C. nitidus seeds (Mancuso 1996). 10 p. plus appendices. Internet website: Dispersal is a critical characteristic of the life history of species that https://idfg.idaho.gov/ifwis/idnhp/cdc occupy ephemeral habitats or that occur early in succession after _pdf/mancm96a.pdf. Accessed on disturbance. Habitat for this species is described as late seral and climax October 26, 2017. grassland communities which are not ephemeral or early successional communities (Mancuso 1996). Mancuso, M. 1996. Report on the conservation status of Calochortus The dispersal capability of this species is likely limited to short distances. nitidus. Internet website: This species appears to disperse only through suitable habitat (Rank B). https://idfg.idaho.gov/ifwis/idnhp/cdc _pdf/mancm96a.pdf. Accessed on Confidence in this rank is medium as dispersal mechanisms for this October 26, 2017. species have not been studied. Confidence in Rank: High, Medium, or Low Species (Scientific and Common Name): Calochortus nitidus (broad-fruit mariposa lily) Criteria Rank Rationale Literature Citations 4 A This species is known from two populations on the Forest. The density of Mancuso, M. 1996. Report on the Abundance on the populations on the Forest is low and the two known populations are 77 conservation status of Calochortus Salmon-Challis miles apart. The precise number of individuals is unknown but may be as nitidus. Internet website: National Forest low as 27 or as high as 76 (RMH 2017). Given these estimates, there may https://idfg.idaho.gov/ifwis/idnhp/cdc be fewer than 200 individuals on the Forest. _pdf/mancm96a.pdf. Accessed on October 26, 2017. Within a population, the density of this species is often variable, from