Roadless Areas
Home/Species/ Parry Sandpaper-plant

Petalonyx parryi

Gray

Parry Sandpaper-plant

G2Imperiled (G2G3) Found in 2 roadless areas NatureServe Explorer →
G2ImperiledGlobal Rank
High - mediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.138576
Element CodePDLOA04030
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderViolales
FamilyLoasaceae
GenusPetalonyx
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 MethodLegacy Rank calculation - Biotics v1
Review Date2019-06-06
Change Date1999-08-16
Edition Date2019-06-06
Edition AuthorsStoner, N.; rev. C. Annable; rev. G. Davis (May 2000), rev. Treher (2019)
Threat ImpactHigh - medium
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences21 - 80
Rank Reasons
Petalonyx parryi has a limited range in northwestern Arizona, southwestern Utah, and extreme southern Nevada. It is common where it occurs (sometimes a principal component of the vegetation), but development in the region has caused declines and continues to threaten this species. In addition, to being threatened by development, recreational activities and mining (for gypsym) threaten the species.
Range Extent Comments
Petalonyx parryi occurs in Washington County, Utah, south to western Coconino and northern Mohave Counties, Arizona (Kearney and Peebles 1951), west to a small area in extreme southern Nevada (Kartesz 1988). There is a historic specimen from California (SEINet 2019).
Occurrences Comments
There are about 8 recent occurrences in Arizona and there are between 7 and 10 known extant occurrences in Washington County, Utah. There are a minimum of 15 occurrences in Nevada based on herbarium records. Historic occurrences collected in Las Vegas are almost certainly extirpated (iNaturalist 2019, SEINet 2019).
Threat Impact Comments
The primary threats to this species are urban development in Utah and Nevada, recreation (AZ and UT) and gypsum mining (UT). In Utah, most occurrences of this species are in the vicinity of St. George, where ongoing and rapid urban and suburban development has already destroyed plants and even occurrences.
Ecology & Habitat

Habitat

This species occurs in dry, desert washes and canyons, often on gypsum and micaceous shales with Phacelia, Psorothamnus, and Atriplex. In Arizona, below 3,000 feet in dry washes (Kearney and Peebles 1951).
Terrestrial Habitats
Desert
Other Nations (1)
United StatesN2
ProvinceRankNative
NevadaS3Yes
UtahS1Yes
ArizonaS1Yes
Threat Assessments
ThreatScopeSeverityTiming
1 - Residential & commercial developmentRestricted (11-30%)Extreme - seriousHigh (continuing)
1.1 - Housing & urban areasRestricted (11-30%)Extreme - seriousHigh (continuing)
3 - Energy production & miningUnknownUnknownUnknown
3.2 - Mining & quarryingUnknownUnknownUnknown
6 - Human intrusions & disturbanceRestricted - smallModerate - slightHigh (continuing)
6.1 - Recreational activitiesRestricted - smallModerate - slightHigh (continuing)

—

Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (2)
Utah (2)
AreaForestAcres
CottonwoodDixie National Forest6,754
Pine Valley MountainsDixie National Forest57,673
References (9)
  1. Flora of North America Editorial Committee (FNA). 2016. Flora of North America north of Mexico. Vol. 12. Magnoliophyta: Vitaceae to Garryaceae. Oxford Univ. Press, New York. xxiv + 603 pp.
  2. iNaturalist. Online. Available: http://www.inaturalist.org (accessed 2019).
  3. Kartesz, J.T. 1988. A flora of Nevada. Ph.D. dissertation. Univ. of Nevada, Reno. 3 volumes. 1729 pp.
  4. 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.
  5. Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.
  6. Kearney, T.H., R.H. Peebles, and collaborators. 1951. Arizona flora. 2nd edition with Supplement (1960) by J.T. Howell, E. McClintock, and collaborators. Univ. California Press, Berkeley. 1085 pp.
  7. Southwest Environmental Information Network (SEINet). 2019. Collections Databases. Online. Available: http://swbiodiversity.org/seinet/collections/index.php (Accessed 2019).
  8. Welsh, S.L., N.D. Atwood, L.C. Higgins, and S. Goodrich, eds. 1987. A Utah Flora. Great Basin Naturalist Memoir 9: 1- 894. Brigham Young University, Provo, Utah. 894 pp.
  9. Welsh, S.L., N.D. Atwood, S. Goodrich, and L.C. Higgins (eds.) 1993. A Utah flora. 2nd edition. Brigham Young Univ., Provo, Utah. 986 pp.