Sclerocactus sileri
(L. Benson) Heil & J.M. Porter
Siler's Fishhook Cactus
G1Critically ImperiledGlobal Rank
VulnerableIUCN
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.155632
Element CodePDCAC0J0T0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
IUCNVulnerable
CITESAppendix II
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderCaryophyllales
FamilyCactaceae
GenusSclerocactus
SynonymsSclerocactus pubispinus var. sileriL. Benson
Concept ReferenceKartesz, 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.
Taxonomic CommentsSclerocactus pubispinus var. sileri is included in S. spinosior in Kartesz (1994), but recognized as distinct, at the species level in Kartesz (1999).
Conservation Status
Rank MethodLegacy Rank calculation - Excel v3.1x
Review Date2015-12-30
Change Date2004-04-21
Edition Date2015-12-30
Edition AuthorsMaybury, K., rev. S. Schuetze (2012), rev. A. Treher (2015)
Threat ImpactUnknown
Range Extent250-1000 square km (about 100-400 square miles)
Number of Occurrences6 - 20
Rank ReasonsRestricted to a very limited area in northeast Coconino County, Arizona, based on current information from field investigations and herbarium collections (FNA 2004). About 12 occurrences, most of them very small (2-10 plants). Plants are scattered throughout the Vermillion Cliffs National Monument, on sandy/rocky soils. They are threatened by ORV use and collecting. (Wendy Hodgson, in Laurenzi and Spence 2012). Lee Hughes (BLM retired) reports the population as stable (in Laurenzi and Spence 2012).
Range Extent CommentsRestricted to a very limited area (Paria Plateau and Vermillion Cliffs) in northeast Coconino County, Arizona.
Occurrences Comments12 occurrences (2 historical) restricted to a very limited area in NE Coconino County, Arizona.
Threat Impact CommentsThreats include ORV use and collecting (Wendy Hodgson, in Laurenzi and Spence 2012).
Ecology & Habitat
Habitat
Sandstone to sandy soil of the Moenave, Chinle, and Navajo Formations; also silty sand or clay soils with a gravel component. Sometimes on mesas. Grama grassland to pinyon-juniper woodland communities. Associated species include drop seed, yucca, hedgehog cactus, sagebrush, and snakeweed. 1475 - 1860 m.
Terrestrial HabitatsForest/WoodlandWoodland - ConiferSavannaGrassland/herbaceous
Other Nations (1)
United StatesN1
| Province | Rank | Native |
|---|
| Arizona | S1 | Yes |
References (4)
- Arizona Rare Plant Committee (ARPC). 2001. Arizona rare plant field guide: A collaboration of agencies and organizations. Arizona Rare Plant Committee, Phoenix.
- Flora of North America Editorial Committee (FNA). 2003b. Flora of North America north of Mexico. Vol. 4, Magnoliophyta: Caryophyllidae, part 1. Oxford University Press, New York. xxiv + 559 pp.
- Heil, K.D., and J.M. Porter. 1994. Sclerocactus (Cactaceae): A revision. Haseltonia 2:20-46.
- 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.