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Ivesia aperta

(J.T. Howell) Munz

Sierra Valley Ivesia

G2Imperiled (G2G3) Found in 7 roadless areas NatureServe Explorer →
G2ImperiledGlobal Rank
Very high - mediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.156148
Element CodePDROS0X010
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderRosales
FamilyRosaceae
GenusIvesia
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.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-05-06
Change Date2024-05-06
Edition Date2024-05-08
Edition AuthorsD. Gries, rev. J Johnson (2024)
Threat ImpactVery high - medium
Range Extent1000-5000 square km (about 400-2000 square miles)
Number of Occurrences21 - 80
Rank Reasons
Ivesia aperta is represented by two varieties. There are 41 extant occurrences of Ivesia aperta var aperta recorded in Nevada and California. Threats to this variety are residential development, agriculture, grazing and vehicle use. Ivesia aperta var. canina is known from only one population in Dog Valley, Sierra County, California and one on Peavine Mountain, Washoe County, Nevada. Ivesia aperta var. canina is threatened by recreation, vehicle use, and grazing.
Range Extent Comments
The range of Ivesia aperta is north of Lake Tahoe and east of the Sierra Nevada crest in eastern California and western Nevada in the western USA. Range extent was estimated using herbarium specimens, photo-based observations, and NatureServe Network occurrence data collected between 1993 and 2024 (CNDDB 2024, iNaturalist 2024, NatureServe 2024, SEINet 2024).
Occurrences Comments
By applying a 1 km separation distance to herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1993 and 2024, it is estimated that there are 43 occurrences range-wide (CNDDB 2024, iNaturalist 2024, NatureServe 2024, SEINet 2024).
Threat Impact Comments
Sites where these plants occur continue to be subject to impacts from grazing, off-road vehicles, and potential weed encroachment. Unprecedented climatic extremes could potentially extirpate one of more of the populations (Witham 2000). Examination of aerial imagery shows that populations in Nevada receive more use from off-road vehicles than those in California (NatureServe 2024). See child taxa for detailed threat information.
Ecology & Habitat

Habitat

Seasonally dry meadows and riparian margins in Great Basin scrub, lower montane coniferous forest (openings), pinyon and juniper woodland; usually volcanic soils, rocky (Skinner, 1997). Ivesia aperta var. canina grows in shallow rock of volcanic origin, clearings in yellow pine forest, 1700-1900 m elevation (Ertter 1988).
Terrestrial Habitats
Forest/WoodlandForest - ConiferWoodland - ConiferShrubland/chaparralGrassland/herbaceous
Other Nations (1)
United StatesN3
ProvinceRankNative
NevadaS1Yes
CaliforniaSNRYes
Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (7)
California (1)
AreaForestAcres
Adams PeakPlumas National Forest5,283
Nevada (6)
AreaForestAcres
Mystic (NV)Humboldt-Toiyabe National Forest5,644
Rose - Big MeadowsHumboldt-Toiyabe National Forest311
Rose - Dutch LouieHumboldt-Toiyabe National Forest363
Rose - EvansHumboldt-Toiyabe National Forest4,782
Rose - Hunter Lk NoHumboldt-Toiyabe National Forest149
Rose - Whites CanyonHumboldt-Toiyabe National Forest2,568
References (10)
  1. California Natural Diversity Database (CNDDB). 2024. RareFind Version 5.3.0. California Department of Fish and Game, Sacramento.
  2. Ertter, B. 1988. Ivesia aperta var. canina (Rosaceae), new from California. Brittonia 40(4):398-399.
  3. Flora of North America Editorial Committee (FNA). 2014b. Flora of North America north of Mexico. Vol. 9. Magnoliophyta: Picramniaceae to Rosaceae. Oxford University Press, New York. xxiv + 713 pp.
  4. iNaturalist. 2024. Online. Available: https://www.inaturalist.org (accessed 2024).
  5. 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.
  6. NatureServe. 2024. NatureServe Network Biodiversity Location Data. NatureServe, Arlington, Virginia.
  7. Nevada Natural Heritage Program. 1999. February 19-last update. List of sensitive plants. Online. Available: http://www.state.nv.us/nvnhp/sensplnt.htm. Accessed 1999, June 3.
  8. Skinner, M.W., and B.M. Pavlik, eds. 1997 (1994). Inventory of rare and endangered vascular plants of California. 1997 Electronic Inventory Update of 1994 5th edition, California Native Plant Society, Special Publication No. 1, Sacramento.
  9. Southwest Environmental Information Network (SEINet). 2024. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2024).
  10. Spahr, R., L. Armstrong, D. Atwood, and M. Rath. 1991. Threatened, endangered, and sensitive species of the Intermountain Region. U.S. Forest Service, Intermountain Region, Ogden, UT.