Scientific Name: Tecoma stans
Common Name: Yellow Trumpet Bush
Also Called: Esperanza, Trumpet-flower, Trumpetbush, Trumpetflower, Yellow Elder, Yellow Trumpetflower; (Spanish: Gloria, Lluvia de Oro, Tronador, Caballito)
Family: Bignoniaceae, Trumpet Creeper Family
Synonyms: (Bignonia stans, Stenolobium stans, Tecoma stans var. angustatum)
Size: Up to 6 feet or more, 2 or 3 feet in Arizona.
Growth Form: Small tree or large shrub; mostly erect, multiple branches, striking profile in bloom with its bright yellow flowers and bright green leaves.
Leaves: Bright green; opposite, serrate, pinnate, leaflets 5 or more (see photo).
Flower Color: Bright yellow; trumpet-shaped or funnelform; fruit is a pod up to 8 inches long, circular and smooth (terete).
Flowering Season: May to October.
Elevation: 3,000 to 5,000 feet.
Habitat Preferences: Dry gravelly slopes in Arizona.
Recorded Range: Yellow Trumpet Bush, under various names, is found in the southwest and southern United States in AZ, NM, TX and FL. It is also found in Baja California and central and northern Mexico with its range extending south to central and South America. In Arizona it is found in the eastern and southeastern parts of the state.
North America & US County Distribution Map for Tecoma stans.
U.S. Weed Information: No USGS data listed.
Invasive/Noxious Weed Information: No USGS data listed.
Wetland Indicator: Tecoma stans is included on the USDA 2012 National Wetland Plant listed as an obligate upland (UPL) species.
UPL: Almost never occur in wetlands.
Threatened/Endangered Information: No USGS data listed.
Genus Information: There is 1 species in Tecoma that is native to the United States.
Comments: Yellow Trumpet Bush, referenced by many names across its broad southern range is a beautiful plant with significant ornamental use as a cultivated species in desert and upland landscapes. The large showy flowers are readily visited by insects, including bees, butterflies and hummingbirds.
Angel’s trumpet, (genus Brugmansia), genus of seven species of small trees and shrubs in the nightshade family (Solanaceae). Angel’s trumpets are commonly grown as ornamentals in frost-free climates and in greenhouses, and several attractive hybrids have been developed. The plants are sometimes confused with the annual herbaceous plants of the related genus Datura.
Angel’s trumpets were once native to South America, but all species are now listed as extinct in the wild by the IUCN Red List of Threatened Species. The species Brugmansia arborea, golden angel’s trumpet (B. aurea), B. insignis, red angel’s trumpet (B. sanguinea), B. versicolor, and B. vulcanicola were variously distributed in the Andes region of South America, ranging from Colombia to northern Chile. Angel’s tears (B. suaveolens) was native to the Atlantic coast of southeastern Brazil. Several species have become naturalized in various temperate and tropical locations around the world.
Angel’s trumpets are evergreen plants with many branching trunks and are typically less than 8 metres (26 feet) in height. The simple leaves can be toothed or entire and are alternately arranged along the stems. The large pendulous flowers have a fused trumpet-shaped corolla and can be white, cream, yellow, orange, red, pink, or greenish in colour. The flowers of some species can reach up to 50 cm (20 inches) in length. Most species are fragrant at night and attract moths for pollination, though the red angel’s trumpet lacks scent and is pollinated by hummingbirds.
All parts of angel’s trumpets are considered poisonous and contain the alkaloids atropine, scopolamine, and hyoscyamine. Ingestion of the plants can cause disturbing hallucinations, paralysis, tachycardia, and memory loss and can be fatal. Various species were used both ritualistically and as herbal medicine by indigenous peoples and their shamans, particularly in the northern Andes.
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Scientific Name: Tecoma stans
Synonyms: Bignonia stans, Stenolobium stans
Common Names: Yellow Trumpetbush, Yellow Trumpet Bush, Yellow Bells, Yellow Trumpet-flower, Yellow Elder
Duration: Perennial, Frost deciduous
Growth Habit: Tree, Shrub
Arizona Native Status: Native
Habitat: Desert (upper elevation), Upland. Yellow Trumpetbush grows on rocky hillsides and is typically found in the lower mountain foothills. This plant is frost sensitive, so it prefers warm locations like sunny, south-facing hillsides where the cold winter air drains away at night. Because it has showy flowers and attractive foliage, this plant is also grown as a garden and landscaping plant here.
Flower Color: Yellow
Flowering Season: Spring, Summer, Fall
Height: To 20 feet (6.1 m) tall, but usually less here due to hard frosts and limited water
Description: The trumpet-shaped flowers are clustered at the branch tips. The individual flowers are broadly tubular, 2 inches (5 cm) long, and have 5 rounded lobes. The flowers are followed by 8 inch (20 cm) long, narrow, brown seed pods. The leaves are pinnately compound with an odd number of green, toothed, lanceolate leaflets.
Hummingbird Flower – The flowers attract hummingbirds and also large, black Carpenter Bees (Carpenter bees (Xylocopa spp.).
Kingdom: Plantae – Plants
Subkingdom: Tracheobionta – Vascular plants
Superdivision: Spermatophyta – Seed plants
Division: Magnoliophyta – Flowering plants
Class: Magnoliopsida – Dicotyledons
Family: Bignoniaceae – Trumpet-creeper family
Genus: Tecoma Juss. – trumpetbush
Species: Tecoma stans (L.) Juss. ex Kunth – yellow trumpetbush
More About This Plant
Arizona County Distribution Map