American Threefold

trixis californica

The American Threefold (Trixis californica) is a resilient, evergreen-to-deciduous desert shrub native to the arid landscapes of the southwestern United States and northern Mexico. Belonging to the aster family, this hardy plant brings a burst of year-round color to dry washes and rocky slopes with its cheerful, golden-yellow flowers. It is highly valued for its ability to survive extreme heat and drought, often serving as a critical resource for local desert pollinators when other plants have withered.

Habitat: Found on dry, rocky slopes, gravelly desert washes, and sandy canyon floors within chaparral and desert scrub communities.

Appearance

This low-growing, spreading shrub typically stands between 30 and 150 centimeters tall, featuring many branches covered in glandular-pubescent, sticky green stems. Its leaves are lance-shaped, bright green, and have smooth or finely-toothed edges. The most distinguishing feature is the clustered heads of bright yellow flowers, each head containing about 11 to 14 individual florets that have a distinctive two-lipped (bilabiate) shape, with the outer lip divided into three small lobes.

KingdomPlantaePhylumTracheophytaClassMagnoliopsidaOrderAsteralesFamilyAsteraceaeGenusTrixis

American Threefold

Interesting facts

Because of its sticky, glandular foliage, the plant is highly resistant to many common mammalian herbivores, allowing it to thrive in heavy-grazing desert environments.

Indigenous groups, including the Seri people of Mexico, traditionally used a decoction brewed from the roots of this plant to treat respiratory issues like colds.

The name 'Threefold' refers to the unique shape of the yellow flower's outer corolla lip, which is split into three distinct lobes.

Special abilities

During periods of extreme moisture stress, this plant can drop its leaves to conserve vital water, quickly regrowing them when rains return.

Unlike many seasonal plants, it has the ability to bloom at any time of the year in response to unpredictable desert rainfall.

The stems and leaves secrete a sticky, glandular substance that deters crawling insect pests while reducing water loss through transpiration.

Measurements & details

Length: 30-150 cm
Lifespan: 5-20 years

Diet & Feeding

As a photosynthetic plant, the American Threefold synthesizes its own organic compounds using sunlight, carbon dioxide, water, and minerals absorbed from the soil.

Primary Foods

Sunlight
Carbon Dioxide
Water
Soil Minerals

Ecological connections

eaten by

Desert Tortoise

Gopherus agassizii

Provides critical forage, especially during dry seasons when other desert vegetation is scarce.

mutualism

Honey Bee

Apis mellifera

Visits the bright yellow flowers to collect nectar and pollen, acting as an essential pollinator.

competitor

Creosote Bush

Larrea tridentata

Competes for water and root space in the shared desert wash and scrub habitats.

Traits

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Also known as

No aliases listed yet.

Collections

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Safety

Danger

1/5 · Very low

No special safety notes yet.

Frequently Asked Questions

How to identify American Threefold?

The easiest way to identify American Threefold is to use the Snappit nature identifier app.

How long is American Threefold?

30-150 cm

How long does American Threefold live?

5-20 years

What does American Threefold eat?

As a photosynthetic plant, the American Threefold synthesizes its own organic compounds using sunlight, carbon dioxide, water, and minerals absorbed from the soil.

Where is American Threefold usually found?

Found on dry, rocky slopes, gravelly desert washes, and sandy canyon floors within chaparral and desert scrub communities.