Desert Marigolds (Baileya multiradiata)

Desert Marigolds located off the Old Mojave Road.
Desert Marigolds photographed near the Old Mojave Road.

Biological Report: Desert Marigold

Scientific Taxonomy

  • Kingdom: Plantae
  • Clade: Tracheophytes
  • Clade: Angiosperms
  • Clade: Eudicots
  • Clade: Asterids
  • Order: Asterales
  • Family: Asteraceae (Aster or Sunflower family)
  • Genus: Baileya
  • Species: Baileya multiradiata Harv. & A. Gray ex A. Gray

Common names include desert marigold, showy desert marigold, paper daisy, desert baileya, and hierba amarilla. Synonyms include Baileya australis, Baileya multiradiata var. nudicaulis, Baileya multiradiata var. thurberi, and Baileya thurberi. The genus is named after American botanist Jacob Whitman Bailey; “multiradiata” refers to the many-rayed flower heads.

Description

Desert marigold is a native, sun-loving biennial or short-lived perennial forb/herb that typically grows 12–18 inches (30–52 cm) tall and spreads 4–12 inches (10–30 cm) wide, forming attractive mound-shaped clumps. The basal leaves are grayish-green, woolly (covered in soft white hairs that help retain moisture), pinnately lobed to entire, and clustered at the base (4–10 cm long). The stems are mostly leafless and branched in the lower half. Flower heads are solitary, daisy-like composites borne on long, naked stalks (10–32 cm). Each head measures about 1.5–2 inches (4–5 cm) across with 25–50 bright yellow ray florets (the “petals”) surrounding a central disk of 25–50+ yellow disk florets. As the flowers age, the rays fade and become papery, giving rise to the common name “paper daisy.” The plant is adapted to arid conditions and is distinguished from similar species like woolly desert marigold (Baileya pleniradiata) by its taller stature, longer bloom period, and greater abundance.

Blooms

The showy, bright-yellow composite flower heads bloom intermittently from March (or April) through November, and can continue year-round in favorable conditions with adequate moisture. Flowering is sporadic but prolific, often triggered by rainfall, producing impressive mounds of nearly solid yellow. The long-lasting blooms turn papery and persist on the plant as they age. This extended blooming period makes it one of the most reliable and conspicuous desert wildflowers.

Range and Distribution

Desert marigold is native to the Mojave, Sonoran, and Chihuahuan deserts of the southwestern United States and northern Mexico. In the U.S., it occurs in Arizona, California, Nevada, New Mexico, Texas, and Utah (primarily at lower to mid-elevations). In Mexico, it extends into states including Sonora, Chihuahua, Coahuila, Durango, and Aguascalientes. It grows on sandy or gravelly (often alkaline) soils in washes, roadsides, rocky slopes, sandy plains, mesas, and semidesert grasslands, from near sea level up to about 5,000–6,500 ft (100–1,981 m). It thrives in full sun and well-drained soils across desert ecosystems.

This hardy, drought-tolerant wildflower is an iconic component of southwestern desert landscapes, valued for its cheerful blooms and adaptability.

This yellow wild flower is also known as:

  • Desert Marigold
  • Showy Desert Marigold
  • Paper Daisy
  • Desert Baileya

Bert Smith’s Cabin

Bert Smith's Cabin overlooks Camp Rock Springs
Bert Smith’s Cabin overlooks Camp Rock Springs

Located deep in the Mojave National Reserve exists a small stone building, known as Bert Smith’s Cabin, which serves as an ongoing monument to a national hero.  Bert Smith was a World War One veteran who moved to the Mojave in order to prolong his live and recover from the poison gas attacks which damaged his lungs during the war.  The original structure was built from wood, and later finished in stone.  Bert Smith lived at the site despite his prognosis, until the 1950’s.

Bert Smith's Cabin located in the Mojave National Reserve
Bert Smith’s Cabin located in the Mojave National Reserve
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Desert Primrose (Oenothera deltoides)

Desert Primrose photographed in Anza Burego, CA
Desert Primrose photographed in Anza Burego, CA

Classification (Taxonomy)

Oenothera deltoides belongs to the evening primrose family and is classified as follows (using a combination of traditional Linnaean ranks and modern phylogenetic clades):

  • Kingdom: Plantae
  • Clade: Tracheophytes (vascular plants)
  • Clade: Angiosperms (flowering plants)
  • Clade: Eudicots
  • Clade: Rosids
  • Order: Myrtales
  • Family: Onagraceae Juss. (Evening Primrose family)
  • Genus: Oenothera L.
  • Species: Oenothera deltoides Torr. & Frém. (described in 1845 by John Torrey and John C. Frémont)

The species includes several subspecies (e.g., O. d. subsp. howellii, which is federally endangered in California, and others such as subsp. deltoides, subsp. piperi, subsp. ambigua, subsp. cognata, and subsp. julpunensis). The overall species is considered secure.

Description

Oenothera deltoides, commonly known as the Desert Primrose, is a bushy or mounded annual (sometimes short-lived perennial) herb in the Evening Primrose family. It typically grows 2–18 inches (5–46 cm) tall but can reach up to 3 feet (about 1 m) in favorable conditions, with a spread up to 40 inches (1 m) wide. The plant often forms a dense basal rosette with a central erect stem and several decumbent to ascending leafy branches. The herbage is grayish-green to pale green and may be hairy or glandular.

Leaves: Primarily basal and sparse along the stems; deltoid (triangular) to obovate or oblanceolate in shape, up to 4 inches (10 cm) long. Margins are often toothed, lobed, grooved, or cleft, giving a distinctive triangular appearance (reflected in the species epithet deltoides).

Flowers: Large, showy, and fragrant, measuring 1.5–3 inches (4–8 cm) wide with four white petals forming a saucer or cup shape (sometimes turning yellowish toward the center). They open in the early evening (around sunset) and close by mid-morning, a classic evening-primrose trait. The flowers are solitary in the upper leaf axils and fade to pinkish with age. They are pollinated primarily by nocturnal moths (such as the white-lined sphinx moth) and native bees.

Fruit: A woody capsule that persists after flowering.

Distinctive Feature: After the plant dies (typically after setting seed), the stems curl upward and inward, forming a hollow, cage- or basket-like structure. This gives rise to many of its common names and allows the dried plant to tumble in the wind, dispersing seeds.

The plant is highly adapted to arid conditions and often carpets sandy desert floors with white “tissue-paper-like” blooms following abundant winter rains.

Range and Distribution

Oenothera deltoides is native to the Southwestern United States and northern Mexico. Its range includes the Mojave and Colorado Deserts, extending into parts of the Great Basin and coastal sandy areas. It occurs in the following U.S. states: Arizona (AZ), California (CA), Nevada (NV), Oregon (OR), and Utah (UT). In Mexico, it is found in northern Baja California and northwestern regions.

Habitat: Dry, open sandy soils, dunes, desert washes, rocky cliffs, hillsides, and occasionally beaches or coastal dunes. Elevations are generally below 2,500–5,500 feet (760–1,680 m), depending on the region. It thrives in full sun and is most abundant in the Mojave, Sonoran, and adjacent desert regions after wet winters.

Flowering season is primarily January–May (varying slightly by location and rainfall), with peak blooms often in February–April.

List of Other Common Names

In addition to Desert Primrose (or Dune Primrose), the species is known by many evocative names that reference its flowers, fragrance, or post-death “cage” structure:

  • Birdcage evening primrose
  • Basket evening primrose
  • Birdcage primrose
  • Dune evening primrose
  • Lion in a cage (or Lion-in-a-cage)
  • Devil’s lantern (or Desert lantern)
  • Fragrant primrose
  • Desert evening-primrose
  • Hairy evening primrose (occasional reference)

These names vary regionally but consistently highlight the plant’s striking appearance and unique dried form.

Oenothera deltoides is a beautiful and ecologically important desert wildflower, providing nectar for pollinators and contributing to the spectacular spring displays of the American Southwest. It is widely available for native plant gardening in arid regions and requires well-drained sandy soil with minimal irrigation once established.

Darwin Falls

The waterfalls of Darwin are located on the western edge of Death Valley National Park near the settlement of Panamint Springs, California. Although there exists a similarly named Darwin Falls Wilderness adjacent to the waterfall, the waterfalls themselves are located in and administered by Death Valley National Park and the National Park Service.

Darwin Falls is a nice hike near Death Valley National Park, CA
Darwin Falls is a nice hike near Death Valley National Park, CA

There are several falls, but they are mainly divided into the upper and lower with a small grotto in between. At a combined 80 feet (24 m), it is the highest waterfall in the park.

The hike into Darwin falls is rather short and easy terrain to reach the shallow pools which form under the water fall. There are, however, multiple creek The narrow canyon does contain Cottonwood trees and willows and offers some shade from the sun as you approach the waterfalls. The creek and pools in the area, like almost every other water source in the desert form an oasis of life in the desert. Birds and amphibians are common.

My trip on the early spring found no other hikers on the trail and a serene place to visit. It is easy to image that even this rather easy hike could be quite rough when the summer sun scorches the landscape and temperatures climb.

There is no swimming at Darwin Falls and the creek is a source of drinking water.

Owl’s Clover (Castilleja exserta)

Owls Clover (Castilleja exserta) is a small flowering plant which can grow about 1 foot tall.   The Owl’s Clover is a native plant to California, Arizona, New Mexico and the Northwestern areas of Mexico.  Like other Castilleja plants, which also includes the Indian Paintbrushes, the Owl’s Clover is hemiparasitic which means that it obtains its nutrients from the roots of other plants.

Owls Clover photographed in the California Poppy Reserve - Photo by James L Rathbun
Owls Clover photographed in the California Poppy Reserve – Photo by James L Rathbun

The Owls Cover blooms from March to May and may be found at elevations from 2000 ft to 3000 ft. The plant ranges in height from 4 to 18 inches in height. The underdeveloped, hairy stemmed leaves are threaded in appearance because they are not needed for nutrients or photosynthesis. Rather, the roots of this plant will growth into the root structures of other plants around it, stealing the nutrients from it.

The thin, erect bracts are usually tipped in the same color. This will give the flower a dual tone color and the appearance a paintbrush dipped in paint. This is the source of the the paintbrush common name of other plants in this genus.

The seeds of the Owl’s clover were harvested and utilized as a food source by the indigenous peoples of California.