T.M. Draper
Identity
Unique IDELEMENT_GLOBAL.2.1256500
Element CodePDAST4N280
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderAsterales
FamilyAsteraceae
GenusHelianthus
Concept ReferenceDraper, T.M., and T.C. Esque. 2021. A new species of Helianthus (Asteraceae) from Clark County, Nevada. Madroño, 68(1): 52-56.
Taxonomic CommentsHelianthus devernii is a newly discovered species known only from Spring Mountains, Nevada (Draper and Esque 2021).
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2023-03-21
Change Date2022-11-02
Edition Date2022-11-02
Edition AuthorsTomaino, A. (2022)
Threat ImpactUnknown
Range Extent<100 square km (less than about 40 square miles)
Number of Occurrences1 - 5
Rank ReasonsHelianthus devernii is a perennial herb known from approximately 400 plants at two desert springs less than 0.5 km apart, mostly on private inholdings within Red Rock Canyon National Conservation Area in Clark County, Nevada. Threats include heavy recreational use, burro disturbance, any over-pumping of ground water, and fires fueled by exotic grasses.
Range Extent CommentsHelianthus devernii is known only from two springs in the Spring Mountains of Clark County, Nevada in the western United States (Draper and Esque 2021).
Occurrences CommentsThere are multiple sites for Helianthus devernii that are less than 0.5 km apart, and therefore considered one occurrence (SEINet 2023, Draper and Esque 2021).
Threat Impact CommentsHelianthus devernii is threatened by heavy recreational use and exotic plants and animals (burros, Equus asinus), excessive groundwater use, fires exasperated and fueled by exotic grasses (Draper and Esque 2021).