Brugmansia suaveolens (Humb. & Bonpl. ex Willd.) Sweet

Yellow angel's trumpet (Brugmansia suaveolens) is a shrub or small tree 1-6 meters tall from the Solanaceae family native to South America, now also found as a new invasive species in Southern Italy. This plant is cultivated as both an ornamental and traditional medicine in many tropical regions. Yellow angel's trumpet is traditionally believed to relieve stomach ache and act as an anti-inflammatory.

Yellow angel's trumpet is winter-hardy up to USDA Zone 8-10, where the plant is usually grown in organic-rich soil, with moderate moisture, well-drained soil under full sun. During the growing season, the plant requires regular fertilization to stimulate growth and new flowers. Mean annual temperature 15-25°C, mean annual rainfall 500-2500 mm.

• Stem woody and thick, with many branches spreading right and left or sympodial, young stems densely covered by multicellular trichomes.
• Leaves green, deciduous, alternate, petiolate (up to 12.2 cm long) and simple, ovate-lanceolate (5.0-38.5 × 2.0-16.8 cm), with entire or slightly wavy margins, apex acutely pointed, base asymmetric and tapering. The lower surface is more covered by multicellular trichomes mostly on the main vein, and paler green than the upper surface.
• Flowers axillary, fragrant, solitary, on a stalk 3.3-4.7 cm long covered by pressed multicellular trichomes. Calyx gamosepalous, 5-lobed, with a tube 6.0-6.8 cm long, and acute-acuminate lobes 2.2-2.9 × 1.3-1.5 cm, green and hairless. It is green and covered by multicellular trichomes on the main veins and lobe margins. Corolla infundibuliform, 5-lobed, with a tube length of 25.0-30.5 cm, and a maximum diameter at its mouth of up to 17.5 cm. It ends in a slightly curved, acutely apiculate tip 0.8-1.3 cm long, colored pale white-orange, pale green with hairy veins especially at the base (yellow-orange on herbarium samples). Stamens included in the corolla, with filaments attached to the corolla tube, anthers adherent and connected to each other, forming a short sheath around the style. Ovary 2-locular, 5.0 × 1.5 mm in size, with a style 21.0-25.5 cm long and an elongated stigma.
• Fruit a capsule.
• Seeds thick, cork-like coat, gray in color.

Propagation of this plant is through seed or cuttings.

Alkaloids (scopolamine, atropine, and hyoscyamine), saponins, glycosides, flavonoids, and polyphenols.

Relieves stomach ache, has anti-inflammatory activity, anticholinergic effects, and acts as an anesthetic agent for external use.

• Prepare an adequate amount of yellow angel's trumpet flowers, wash clean with running water then drain.
• Dry under the sun or with an oven at 40°C until the moisture content reaches 10%.
• Store in a clean, airtight container.

Kecubung gunung.