Creosote
Creosote serves a purpose in its environment. It may not be the best firewood, but it can be quite useful in other ways to the desert bushcrafter.
Larrea tridentata, also known as Creosote bush has long been used by native inhabitants of the desert as a medicinal plant. Locally, it is also referred to as 'greasewood,' but should not be confused with two other southwestern 'greasewoods,'
Sarcobatus and
Atriplex. The creosote plants have a particular odor to them, which is why
Larrea is commonly referred to as hediondilla - "little stinker."
Larrea is a prominent species in the Mojave, Sonoran, and Chihuahuan Deserts of western North America, and its range includes those and other regions in portions of California, Arizona, Nevada, Utah, New Mexico and western Texas in the United States, and northern Chihuahua and Sonora in Mexico.
Like pine,
Larrea is a resin reservoir; as is evident in the amber, tacky syrup exuded as droplets on its stems and leaves. These resins serve to protect the plant in several ways. On the leaf surface, the resins decrease the amount of ultraviolet light and heat that can reach the leaf interior, preventing photosynthesis from slowing down. Resins also limit the loss of water from leaf surfaces, thereby reducing overall transpiration. Therefore the use of cresote leaves in a solar still are quite ineffective.
Furthermore,
Larrea contains a number of compounds that simply taste terrible and repel browsing herbivores and insects. The chemical compounds found in the plant form new complex chemicals within the stomach that are resistant to digestive enzymes, thereby upsetting the digestive system. In short, the creosote bush is not food.
Traditional Uses:
- Creosote lac has been used to seal pottery jars full of food and seeds for perhaps thousands of years, and has been reported to have sealed an overheated, cracked engine block.
- Heaping creosote bush on a fire and holding bare feet over the smoke helps reduce aches in joints.
- In the case of snake, spider or scorpion bite, cresote leaves can be chewed and placed on the swelling (rich in antioxidents).
- WARNING: The US FDA has issued warnings about ingesting
Larrea as an internal medicine because of the risk of damage to the liver and kidneys.
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Plant Name
Scientific Name: Larrea tridentata
Common Names: Creosote Bush, Creosotebush
Plant Characteristics
Duration: Perennial, Evergreen
Growth Habit: Shrub
Arizona Native Status: Native
Habitat: Desert. This shrub is extremely common and widespread in the desert and is the predominate plant in areas known as creosote flats.
Flower Color: Yellow
Flowering Season: Spring, Summer, Fall
Height: To 10 feet (3 m) tall, but usually less, especially in drier or colder locations
Description: The flowers are up to 1 inch (2.5 cm) wide and have 5 twisted petals. The flowers are followed by round, lobed, hairy, white seed capsules. The small, paired leaves are actually a single leaf with 2 split leaflets joined at the base. The leaves are shiny, green, thickened, and waxy-feeling. The branches are gray-brown. These tough, clone-forming shrubs are extremely long-lived, potentially living for hundreds or even thousands of years.
Special Characteristics
Allergenic – The pollen is a mild allergen.
Foul-smelling – The crushed or rain-dampened leaves have a resinous creosote odor that some may find unpleasant.
Fragrant – The leaves give off a distinctive resinous odor after rains, especially in the summertime. Many people find this scent pleasant and evocative of rain in the Sonoran Desert.
Classification
Kingdom: Plantae – Plants
Subkingdom: Tracheobionta – Vascular plants
Superdivision: Spermatophyta – Seed plants
Division: Magnoliophyta – Flowering plants
Class: Magnoliopsida – Dicotyledons
Subclass: Rosidae
Order: Sapindales
Family: Zygophyllaceae – Creosote-bush family
Genus: Larrea Cav. – creosote bush
Species: Larrea tridentata (DC.) Coville – creosote bush
References:
A Field Guide to the Plants of Arizona by Anne Epple
National Audubon Society Field Guide to the Southwestern States: Arizona, New Mexico, Nevada, Utah (Audubon Field Guide) by National Audubon Society