Nutt.
Western Marsh Cudweed
| Province | Rank | Native |
|---|---|---|
| North Dakota | SNR | Yes |
| Utah | SNR | Yes |
| Wyoming | S4 | Yes |
| Idaho | SNR | Yes |
| South Dakota | S4 | Yes |
| Montana | S4 | Yes |
| New Mexico | SNR | Yes |
| Oregon | SNR | Yes |
| California | SNR | Yes |
| Nevada | S3 | Yes |
| Nebraska | S2 | Yes |
| Colorado | S3 | Yes |
| Washington | SNR | Yes |
| Arizona | SNR | Yes |
| Province | Rank | Native |
|---|---|---|
| Saskatchewan | S5 | Yes |
| Alberta | S3 | Yes |
| British Columbia | S5 | Yes |
| Area | Forest | Acres |
|---|---|---|
| Pine Mountain Wilderness Contiguous | Tonto National Forest | 6,518 |
| Area | Forest | Acres |
|---|---|---|
| Antimony | Los Padres National Forest | 40,911 |
| Barker Valley | Cleveland National Forest | 11,940 |
| Bucks Lake | Plumas National Forest | 680 |
| Chips Creek | Plumas National Forest | 12,940 |
| Chips Creek | Lassen National Forest | 29,089 |
| Coyote North | Inyo National Forest | 11,932 |
| Devil's Gate (CA) | Humboldt-Toiyabe National Forest | 9,946 |
| Domeland Add. | Sequoia National Forest | 3,046 |
| East Girard | Shasta-Trinity National Forest | 27,894 |
| Fish Canyon | Angeles National Forest | 29,886 |
| Greenhorn Creek | Sequoia National Forest | 28,226 |
| Hoover - Green Ck No | Humboldt-Toiyabe National Forest | 7,155 |
| Hoover - North | Humboldt-Toiyabe National Forest | 1,574 |
| Horse Creek Ridge | San Bernardino National Forest | 8,969 |
| Iceberg - Mill Creek | Humboldt-Toiyabe National Forest | 26,988 |
| Kettle Mtn. | Shasta-Trinity National Forest | 4,589 |
| Machesna Mountain | Los Padres National Forest | 12,271 |
| Middle Yuba | Tahoe National Forest | 7,379 |
| Mill Creek | Sequoia National Forest | 27,643 |
| Mono | Los Padres National Forest | 28,141 |
| Mt. Jackson | Humboldt-Toiyabe National Forest | 20,721 |
| Pyramid | Eldorado National Forest | 24,347 |
| Pyramid Peak B | San Bernardino National Forest | 7,194 |
| Red Mountain | Angeles National Forest | 8,034 |
| Rock Creek West | Inyo National Forest | 3,626 |
| Rouse Hill | San Bernardino National Forest | 13,745 |
| Sawmill - Badlands | Los Padres National Forest | 51,362 |
| Sill Hill | Cleveland National Forest | 5,294 |
| Timbered Crater | Lassen National Forest | 4,096 |
| Trail Lake | Lassen National Forest | 1,124 |
| Wheeler Ridge | Inyo National Forest | 15,744 |
| Wild Cattle Mtn | Lassen National Forest | 4,965 |
| Area | Forest | Acres |
|---|---|---|
| Cabinet Face East #671 | Kootenai National Forest | 50,326 |
| Elkhorn | Helena National Forest | 75,468 |
| Area | Forest | Acres |
|---|---|---|
| Arc Dome - Secret Bsn | Humboldt-Toiyabe National Forest | 74,782 |
| Mt. Ardivey | Humboldt-Toiyabe National Forest | 37,984 |
| Area | Forest | Acres |
|---|---|---|
| Flag Creek | Malheur National Forest | 7,716 |
| Jackson Creek Appendage | Umpqua National Forest | 4,673 |
| Middle Santiam | Willamette National Forest | 7,316 |
| North Paulina | Deschutes National Forest | 19,670 |
| Olallie | Mt. Hood National Forest | 7,607 |
| South Paulina | Deschutes National Forest | 9,074 |
| Area | Forest | Acres |
|---|---|---|
| Right Hand Fork Logan | Wasatch-Cache National Forest | 15,023 |