Exhibit 4d BSNF Rare Plants List_20221116.pdf

Exhibit 1: Boise National Forest Rare Plant Species List

Rare Plant Species Presence on BOF The Natural Resource Manager (NRM) is the National Forest Service entity charged with developing and maintaining programmatic software applications for different natural resources (e.g. water, wildlife, or vegetation). The data is housed by the USDA National Information Technology Center on servers in Kansas City, MO in the NRM Threatened, Endangered, and Sensitive Plant (TESP) and Invasive Species (IS) corporate database. TESP-IS is the official database of record in which all information, regardless of funding source, must be recorded. Rare plant survey, inventory and population data are stored nationally in this database. National Forests enter and query rare plant survey and population occurrences through the FS Natural Resource Manager system.

One ESA-listed species, slickspot peppergrass, occurs near the BOF and its habitats may be included for surveys should a federal nexus exist. One ESA-Proposed species, whitebark pine, occurs throughout the BOF and may be listed during the period of performance for this contract.

As of 2022, there are 6 Region 4 Sensitive plant species identified by the Regional Forester for BOF. As of 2022, there are 17 Rare Plants Forest Watch plant list species identified in the BOF Revised Forest Plan and updated in 2015, of which 16 species are identified for surveys. Some of these species have highly specific habitat requirements. Other species have broad distributions and occur in a variety of cover types. For all Region 4 Sensitive and Rare Plants Forest Watch Plant list species, unsurveyed potential habitats exist throughout the BOF.

This list is current as of 2022. The BOF may revise this list, adding or removing species, based on best available information. Individual task orders will specify which species will be included in rare plant surveys/inventories.

Table 1 displays the known presence of the ESA-listed, Proposed, Sensitive and Rare Plants Forest Watch plant species in the project area.

Table 1. ESA Listed, Region 4 Sensitive and BOF Forest Watch Plant List Species and Habitat Associations

Scientific Name Common Name

Habitat Association Conservation Status

ESA Listed Lepidium papilliferum

Slickspot peppergrass

Limited to slickspots (mini-playas) in late seral Artemisia tridentata ssp.

wyomiensis/ Achnatherum thurberianum and Artemisia tridentata ssp. wyomiensis/ Pseudoroegneria spicata habitat types. Slickspot soils contain significantly greater sodium and clay content relative to the surrounding area and are easy to detect on the landscape as they tend to be highly

ESA Listed - Threatened G2 S2

Scientific Name Common Name

Habitat Association Conservation Status reflective, light in color, and sparsely vegetated. Elevation range 2,200 to 5,300 feet.

Pinus albicaulis Whitebark pine

A wide range of precipitation from about 20 to 100 inches per year. May occur as a climax species, early successional species, or seral (mid-successional stage) codominant associated with other tree species.

On the BOF, generally above 6,800 to 7,000 feet in elevation though isolated individuals and stands may occur at lower elevations down to 5,400 feet where microclimatic conditions create suitable habitats.

Either in monotypic stands at higher elevations or in mixed stands with other conifers such as subalpine fir, Douglas fir, and Rocky Mountain lodgepole pine.

ESA – Proposed G3G4 S3

Region 4 Sensitive

Allium tolmiei var. persimile

Seven devil’s onion

Mixed semiarid shrub & grasslands in swales, ephemeral water courses or seeps, usually on basalt-derived substrates. Seasonally wet soil dry by late summer; south slopes; Reported elevation range 3,000-5,000 feet.

Region 4 Sensitive G4G5T3S3

Bryum calobryoides

Bryum moss Low gradient wetlands, moist soil or rocks at montane to subalpine elevations; Meadows to moist cliff sides. Estimated elevation 5,000 feet.

One historic herbarium collection above a hot spring near Atlanta, ID.

This species is likely under-surveyed and under-reported.

Region 4 Sensitive

G3SH

Douglasia idahoensis

Idaho dwarf primrose

North/east facing slopes on open, subalpine ridges in whitebark pine & subalpine fir forests. Reported elevation range 7,200-9,000 feet.

Region 4 Sensitive G3S3

Lewisia sacajaweana

Sacajawea’s bitterroot

Relatively sparse upper slopes & ridgetops; Fractured bedrock, granitic soils near late snowbanks. Reported elevation range 5,400-9,500 feet.

Region 4 Sensitive G2 S2

Habitat Association Conservation Status

Phacelia minutissima

Small phacelia

Sagebrush & aspen stands with late snow banks or seeps; false hellebore patches; open understory. Reported elevation range 5,000-8,200 feet.

Region 4 Sensitive G3 S2

Pyrrocoma insecticruris

Wholeleaf goldenweed

Vernally wet meadows and flats with shallow, basalt soils;

Grassland/sagebrush communities.

Reported elevation range 4,600-6,500 feet.

R4 Sensitive G3S3

BOF Rare Plant Forest Watch Plant List

Botrychium crenulatum

Scalloped moonwort

Moist meadows, creek banks, shrub-or tree-dominated wetlands, springy spots, and wet roadside areas.

Reported elevation range 3,900 – 8,200 feet. Ephemeral growth habits make this species difficult to survey;

this species is likely under-surveyed and under-reported on the BOF.

Forest Watch Plant G4S1

Botrychium simplex

Little grapefern

Wide variety of habitats including meadows and forested types;

Reported elevation range 4,000-6,600 feet. Ephemeral growth habits make this species difficult to survey; this species is likely under-surveyed and under-reported on the BOF.

Forest Watch Plant G5S2

Carex livida Livid sedge Calcareous sphagnum peatlands, fens, bogs, swampy forested riparian types, reported elevation range 2,800- 6,000 feet; mid to high elevation subalpine.

Forest Watch Plant G5S3

Carex parryana var. brevisquama (C. aboriginum)

Parry’s sedge Small grass dominated gaps in mixed scrub-shrub riparian. Soils ephemerally moist, silty clay loam to sandy, gravelly. Reported elevation range 2,800-3,400 feet.

Forest Watch Plant G1S1

Carex straminiformis

Mt. Shasta sedge

Open, rocky, gravelly slopes, often near persistent snowbanks, near or above timberline. Reported elevation range 6,500-12,000+ feet.

Forest Watch Plant G5S3

Cicuta bulbifera Bulblet-bearing water hemlock

Floating hummocks in marshes, bogs, wet meadows, lake margins, shallow standing water. Reported elevation

Forest Watch Plant G5S2

Habitat Association Conservation Status range 4,000-6,000 feet, mid to lower elevation lake or peatland habitats on

BOF.

Helodium blandowii

Blandow’s helodium

Mats and hummocks in montane peatlands, fens, and bogs. Under sedges & shrubs or along streams in mires.

Forest Watch List G5S2

Hierochloe odorata (H.

hirta)

Sweetgrass Moist slopes, meadows and streambanks from the foothills to subalpine elevations.

Forest Watch List G5S1 (G5S2)

Penstemon laxus Tufted penstemon

Range limited to several counties in Idaho. Dry meadows or sparsely wooded slopes in mountains.

Forest Watch List G2S2

Polystichum kruckebergii

Kruckeberg’s hollyfern

Rocks and cliffs in subalpine to alpine habitats; Reported elevation range 4,900-10,500 feet.

Forest Watch List G4S2

Rhynchospora alba

White beaksedge

Sphagnum bogs and peatlands.

Reported elevation range 2,000-6,000 feet.

Forest Watch List G5S3

Sanicula graveolens

Northern sanicle

Open or lightly wooded rocky slopes or flats. Found on both granitics and basalts. Reported elevation range 2,000-6,500 feet.

Forest Watch List G4G5S2

Scheuchzeria palustris

Rannoch-rush

Sphagnum bogs and peatlands.

Reported elevation range 2,000-7,000 feet.

Forest Watch List G5S3

Sedum leibergii Leiberg stonecrop

Cliffs and rocky slopes with W-NW aspect. Often with Douglas fir, Reported elevation range 5,000-9,000 feet.

Forest Watch List

GNRS1

Triantha occidentalis ssp.

brevistyla (Tofieldia glutinosa)

Sticky tofieldia

Wet meadows, streambanks, and peatlands, marshes. Sea level to 7,900 feet.

Forest Watch List G5T5S1

Vesicarpa potentilloides var. nitrophilum (Sphaeromeria potentilloides)

Fivefinger chickensage

Clay or clay loam soils on edges of vernal pools or vernally moist alkaline flats and seeps. Reported elevation range below 6,500 feet.

Forest Watch List G5S1

Determining species or habitats that may be rare or declining is an important factor in maintaining biodiversity. To assist with these determinations, researchers and land managers use a common set of conservation status rankings. These standardized rankings indicate how likely a species is to be extirpated from all or part of its range and indicate habitat quantity and quality.

Each of the plant species designated as an Region 4 Sensitive or BOF Forest Watch Plant are assigned a conservation status rank, which is stated and defined in the section below. For more information about conservation status ranking, NatureServe provides more detailed information at NatureServe, an online network that summarizes data from various data centers across the U.S. to provide scientific information about the status and distribution of species of conservation concern.