Utah Species Field Guide | Utah Natural Heritage Program
Utah Species Field Guide Utah Species Field Guide
Frisco Mountains mustard (Terraria haydenii)

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Photo by sheriff_woody_pct; zachcoury; rojosmojo
Sources: ESRI, USGS, NOAA; Matt Berger; Zach Coury; Robert Johnson

Frisco Mountains mustard

Frisco Mountains mustard (Terraria haydenii)

Photo by sheriff_woody_pct; zachcoury; rojosmojo
Sources: ESRI, USGS, NOAA; Matt Berger; Zach Coury; Robert Johnson

Terraria haydenii

NatureServe conservation status

Global (G-rank): G1
State (S-rank): S1

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Species range

The range of this species is very small with only two populations, 1.6 km from one another, situated in the Wah Wah Mountains in Utah.

Threats or limiting factors

Threats to this species include mineral extraction and soil disturbance and trampling by recreational rock collectors (Hildebrand and Al-Shehbaz 2017).  Ongoing drought and lack of suitable habitat are also impacting this species.

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Multicellular organisms that are autotrophic or make complex carbohydrates from basic constituents. Most use photosynthesis.

Flowering plants that produce seeds enclosed in an ovary

Multicellular organisms that develop from the fertilization of an egg by a sperm. Heterotrophic - obtain food by ingestion.

Have skulls and backbones.

Cold blooded, lay eggs on land

Have feathers and lay eggs

Invertebrates with an exoskeleton, jointed appendages, and segmented bodies

Animals having 3 pair of legs, 3 body sections, generally 1 or 2 pair of wings, 1 pair of antennae.

Soft bodied animals with an internal or external shell and a toothed tongue or radula. Have a mantle that lines and secretes the shell and a muscular foot that allows for movement.

Two hinged lateral shells and a wedged shaped "foot". Bivalves lack tentacles and a head.


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