Agastache cusickii - (Greenm.) Heller
Cusick's Giant-hyssop
Other Common Names: Cusick's giant hyssop
Taxonomic Status: Accepted
Related ITIS Name(s): Agastache cusickii (Greenm.) Heller (TSN 32434)
Unique Identifier: ELEMENT_GLOBAL.2.158064
Element Code: PDLAM03030
Informal Taxonomy: Plants, Vascular - Flowering Plants - Mint Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Lamiales Lamiaceae Agastache
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Concept Reference
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Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Agastache cusickii
Conservation Status
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NatureServe Status

Global Status: G3G4
Global Status Last Reviewed: 17Jan2018
Global Status Last Changed: 05May2003
Ranking Methodology Used: Ranked by calculator
Rounded Global Status: G3 - Vulnerable
Reasons: Known from scattered locations in eastern Oregon, northern and central Nevada, and central Idaho and adjacent southwestern Montana. Reported but unconfirmed in California. There are some localized threats, but this species is primarily found in remote, relatively secure locations. Many occurrences are based on historic observations and they should be surveyed to determine their viability. Surveys would also increase our understanding of the distribution and abundance of this species.
Nation: United States
National Status: N3N4

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Idaho (SNR), Montana (S2S3), Nevada (S2), Oregon (S2)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Occurs in Oregon (Harney, Malheur, and Wheeler Counties), central Idaho, northern and central Nevada (Steens, Santa Rosa, White Pine, and Toiyabe Mountains), southwestern Montana in Beaverhead County, and possibly northeastern California in Siskiyou County. Reported from Butte, Clark, Custer, and Lemhi Counties in Idaho.

Area of Occupancy: 6-125 4-km2 grid cells
Area of Occupancy Comments:  

Number of Occurrences: 21 - 80
Number of Occurrences Comments: There are 5 to 7 occurrences in Montana, 8 in Oregon, 5 EOs in Nevada, and an unknown number of EOs in Idaho.

Population Size Comments: Considered rare throughout its range, though locally common at some sites. Occupies less than 100 acres in Montana, representing over 2,000 individuals. Nevada has about 500 plants, and Oregon a couple of hundred more. The number of plants in Idaho is unknown.

Number of Occurrences with Good Viability/Integrity: Unknown
Viability/Integrity Comments: Five occurrences rated as having good to excellent viability but most have not been assessed. A large number of occurrences have not been surveyed for over 20 years.

Overall Threat Impact: Low
Overall Threat Impact Comments: Grazing, gravel removal, slope-destabilizing road maintenance, collection by rock gardeners or possibly recreationist, and mining activities are potential localized threats in part of range. Occurs in remote habitat above 10,000 in Toiyabe Range of Nevada.

Short-term Trend: Unknown
Short-term Trend Comments: Largest population in Montana has diminished with mass wasting of slopes above gravel quarry. Many occurrences are historic.

Long-term Trend: Unknown

Environmental Specificity: Unknown

Other NatureServe Conservation Status Information

Distribution
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Global Range: Occurs in Oregon (Harney, Malheur, and Wheeler Counties), central Idaho, northern and central Nevada (Steens, Santa Rosa, White Pine, and Toiyabe Mountains), southwestern Montana in Beaverhead County, and possibly northeastern California in Siskiyou County. Reported from Butte, Clark, Custer, and Lemhi Counties in Idaho.

U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States ID, MT, NV, OR

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
MT Beaverhead (30001)
NV Humboldt (32013), Lander (32015), Nye (32023)
OR Harney (41025)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
10 Red Rock (10020001)+
16 Reese (16040107)+, Little Humboldt (16040109)+, Lower Quinn (16040202)+, Thousand-Virgin (16040205)+*, Northern Big Smoky Valley (16060004)+, Hot Creek-Railroad Valleys (16060012)+
17 Donner Und Blitzen (17120003)+, Alvord Lake (17120009)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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General Description: Cusick's Horse-mint is an herbaceous, long-lived perennial with numerous stems, woody at the base arising from a branched rootcrown surmounting a taproot. Plants are 1-2 dm high, but the stems often lie prostrate beneath the surface spreading from the rootcrown. Opposite leaves have blades that are 1-2 cm long and triangular with a rounded base and a petiole that is up to 1 cm long. Foliage is covered with fine, short hairs. White flowers are borne amongst purple-tipped bracts in a head-like inflorescence that is 1.5-4 cm long. The tubular corolla is 8-12 mm long, and the purple-tinged calyx is tubular with 5 pointed lobes. The 5 stamens are exserted from the mouth of the flower tube.
Diagnostic Characteristics: AGASTACHE FOENICULUM and the widespread A. URTICIFOLIA have stems higher than 4 dm and leaves longer than 3 cm.
Duration: PERENNIAL
Habitat Comments: Dry slopes at mid to upper elevations, usually on loose, rock substrate.
Economic Attributes
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Economically Important Genus: Y
Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 17Jan2018
NatureServe Conservation Status Factors Author: Roth, E. (1987), rev. E. Joyal, B. Heidel (1999), rev. S. Vrilakas (2006), rev. Treher (2018)
Element Ecology & Life History Edition Date: 31Aug1994
Element Ecology & Life History Author(s): JM

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Cronquist, A., A. H. Holmgren, N. H. Holmgren, J. L. Reveal, and P. K. Holmgren. 1984. Intermountain flora vol. 4. Subclass Asteridae (except Asteraceae). Bronx: The New York Botanical Garden. 573 pp.

  • Goodrich, S. 1981. A floristic study of central Nevada. Provo, Utah: Brigham Young University, M.S. thesis. 400 pp.

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Lesica, P., K. Lackschewitz, J. Pierce, S. Gregory and M. O'Brien. 1986. Noteworthy collections: Montana. Madrono 33:310-312.

  • Nevada Natural Heritage Program. 1986-present. Slide collection files. Carson City.

  • Nevada Natural Heritage Program. 1998-present. Index to available images (web page). Carson City: Nevada Natural Heritage Program public web site, http://heritage.nv.gov/images.htm.

  • U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. 2000. Fire Effects Information System, [Online]. http://www.fs.fed.us/database/feis/.

  • Vanderhorst, J. 1995. Sensitive plant survey of the Tendoy Mountains in the Beaverhead National Forest, Beaverhead County, Montana. Unpublished report to the Beaverhead National Forest. Montana Natural Heritage Program, Helena, MT. 69 pp.

  • Vanderhorst, J. 1995b. Sensitive plant survey of the Tendoy Mountains in the Beaverhead National Forest, Beaverhead County, Montana. Unpublished report to the Beaverhead National Forest. Montana Natural Heritage Program, Helena, MT. 69 pp.

  • Vanderhorst, J. P. 1993. Monitoring of AGASTACHE CUSICKII in the Tendoy Mountains of southwestern Montana: establishment report. Unpublished report to the Bureau of Land Management, Butte District, Dillon Resource Area. Montana Natural Heritage Program, Helena, MT. 13 pp. plus slides.

  • Vanderhorst, J. P. 1993. Monitoring of AGASTACHE CUSICKII in the Tendoy Mountains of southwestern Montana: establishment report. Unpublished report to the Bureau of Land Management, Butte District, Dillon Resource Area. Montana Natural Heritage Program, Helena, MT. 13 pp. plus slides.

  • Vanderhorst, J. P. and P. Lesica. 1994. Sensitive plant survey in the Tendoy Mountains, Beaverhead County, Montana. Unpublished report to the Bureau of Land Management, Butte District. Montana Natural Heritage Program, Helena, MT. 59 pp. plus appendices.

  • Vanderhorst, J. P. and P. Lesica. 1994. Sensitive plant survey in the Tendoy Mountains, Beaverhead County, Montana. Unpublished report to the Bureau of Land Management, Butte District. Montana Natural Heritage Program, Helena, MT. 59 pp. plus appendices.

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