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Hesperidanthus linearifolius

(Gray) Rydb.

Slimleaf Plains-mustard

G5Secure Found in 60 roadless areas NatureServe Explorer →
G5SecureGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.130102
Element CodePDBRA28040
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderCapparales
FamilyBrassicaceae
GenusHesperidanthus
Synonyms
Schoenocrambe linearifolia(Gray) RollinsSisymbrium linearifolium(Gray) Payson
Other Common Names
slimleaf plainsmustard (EN)
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 Date2026-03-20
Change Date2026-03-20
Edition Date2026-03-20
Edition AuthorsSoteropoulos (2026)
Threat ImpactUnknown
Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Number of Occurrences> 300
Rank Reasons
Hesperidanthus linearifolius is a wide-ranging perennial herb found in open woods, dry hillsides, oak woodland, mixed conifer forests, arroyos, canyons, rocky ridges, limestone ledges, sandstone crevices, and roadsides. It occurs in southwestern North America from Arizona, Colorado, New Mexico, and Texas in the southwestern United States and northern Mexico. There are over 700 occurrences. Little is known about threats or trends, but with a large range extent and large number of occurrences, abundant habitat, and broad habitat preferences, this species is considered secure.
Range Extent Comments
Hesperidanthus linearifolius is "widespread in the southwestern United States (Arizona, Colorado, New Mexico, Texas) and northern Mexico (Chihuahua, Coahuila, Durango, Nuevo León, San Luis Potosí, Sonora, Zacatecas)" (Al-Shehbaz 2005). Range extent was estimated to be over 1.3 million square kilometers using herbarium specimens and photo-based observations documented between 1994 and 2025 (RARECAT 2025, GBIF 2026, iNaturalist 2026, SEINet 2026).
Occurrences Comments
By applying a 1 km separation distance to herbarium specimens and photo-based observations documented between 1994 and 2025, it is estimated that there are over 700 occurrences rangewide (RARECAT 2025, GBIF 2026, iNaturalist 2026, SEINet 2026).
Threat Impact Comments
There is insufficient data, including anecdotal accounts, to understand threats for this species.
Ecology & Habitat

Habitat

Hesperidanthus linearifolius grows in "open woods, dry hillsides, oak woodland, mixed conifer forests, arroyos, canyons, rocky ridges, limestone ledges, sandstone crevices, [and] roadsides" (FNA 2010).

Reproduction

This species flowers from July to November (FNA 2010).
Terrestrial Habitats
Forest/WoodlandForest - ConiferForest - MixedWoodland - HardwoodWoodland - ConiferWoodland - MixedShrubland/chaparralBare rock/talus/screeCliff
Other Nations (1)
United StatesN5
ProvinceRankNative
ArizonaSNRYes
TexasSNRYes
ColoradoS3Yes
New MexicoSNRYes
Threat Assessments
ThreatScopeSeverityTiming
Unknown/undetermined———

—

Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (60)
Arizona (18)
AreaForestAcres
Black River CanyonApache-Sitgreaves National Forests11,817
Butterfly Roadless AreaCoronado National Forest42,296
Campbell BlueApache-Sitgreaves National Forests7,003
Cdo WsaCoronado National Forest1,955
ChiricahuaCoronado National Forest76,876
Coconino RimKaibab National Forest7,213
Happy ValleyCoronado National Forest7,972
Hell HoleApache-Sitgreaves National Forests15,512
HellsgateTonto National Forest6,171
Lower San FranciscoApache-Sitgreaves National Forests59,310
Middle Dragoon RoadlessCoronado National Forest10,543
Mitchell PeakApache-Sitgreaves National Forests35,398
NolanApache-Sitgreaves National Forests6,780
Oracle RoadlessCoronado National Forest22,365
Painted BluffsApache-Sitgreaves National Forests43,118
PinalenoCoronado National Forest130,920
Sierra Ancha Wilderness ContiguousTonto National Forest7,787
TumacacoriCoronado National Forest44,594
New Mexico (42)
AreaForestAcres
Alamo CanyonSanta Fe National Forest8,639
Apache Kid ContiguousCibola National Forest67,542
Aspen MountainGila National Forest23,784
Black CanyonSanta Fe National Forest1,922
Bull CanyonCarson National Forest11,512
Candian RiverCibola National Forest7,149
Capitan MountainsLincoln National Forest14,069
Chama WS RiverSanta Fe National Forest4,168
Contiguous To Black & Aldo Leopold WildernessGila National Forest111,883
Contiguous To Gila Wilderness & Primitive AreaGila National Forest79,049
Devils CreekGila National Forest89,916
Elk MountainGila National Forest6,550
GuadalupeCibola National Forest13,619
Guaje CanyonSanta Fe National Forest6,104
Hell HoleGila National Forest19,553
Juan de Gabaldon GrantSanta Fe National Forest8,023
Last Chance CanyonLincoln National Forest8,934
Latir PeakCarson National Forest3,573
Little Dog And Pup CanyonsLincoln National Forest25,412
Lower San FranciscoGila National Forest26,460
Madre MountainCibola National Forest19,839
Meadow CreekGila National Forest34,167
Mesa AltaSanta Fe National Forest1,868
Mt. TaylorCibola National Forest6,355
Nichols ReservoirSanta Fe National Forest1,518
NolanGila National Forest13,051
Ortega PeakLincoln National Forest11,545
Peloncillo (NM)Coronado National Forest43,339
PollywogSanta Fe National Forest8,557
Poverty CreekGila National Forest8,770
Pueblo MesaSanta Fe National Forest3,540
RendijaSanta Fe National Forest2,176
Ryan HillCibola National Forest34,201
San JoseCibola National Forest16,950
Sawyers PeakGila National Forest59,743
South Guadalupe MountainsLincoln National Forest20,930
T BarGila National Forest6,823
Thompson PeakSanta Fe National Forest33,001
Virgin CanyonSanta Fe National Forest6,068
Wahoo MountainGila National Forest23,122
West Face Sacramento MountainsLincoln National Forest41,176
YoungsvilleSanta Fe National Forest6,122
References (7)
  1. Al-Shehbaz, I.A. 2005. <i>Hesperidanthus</i> (Brassicaceae) revisited. Harvard Papers in Botany 10(1): 47-51.
  2. Flora of North America Editorial Committee (FNA). 2010. Flora of North America north of Mexico. Vol. 7. Magnoliophyta: Salicaceae to Brassicaceae. Oxford University Press, New York. xxii + 797 pp.
  3. Global Biodiversity Information Facility (GBIF). 2026. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2026).
  4. iNaturalist. 2026. Online. Available: https://www.inaturalist.org (accessed 2026).
  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. <p>NatureServe's Rapid Analysis of Rarity and Endangerment Conservation Assessment Tool (RARECAT). 2025. Version: 2.1.1 (released April 04, 2025).</p>
  7. Southwest Environmental Information Network (SEINet). 2026. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2026).