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Family • Apocynaceae
Yellow allamanda
Allamanda neriifolia Hook.
BUSH ALLAMANDA

Scientific names Common names
Allamanda neriifolia Hook. Bush allamanda (Engl.)
Allamanda schottii Buttercup flower (Engl.)
  Dwarf golden trumpet (Engl.)
  Yellow allamanda (Engl.)
  Yellow allamanda (Engl.)

• In the Philippines, the "yellow flower" is source of great confusion, especially when it refers to the "yellow bell." and "kampanilya." Kampanilya is a shared common between two species of plant: (1) Thevetia peruviana, campanilla, campanero and (2) Allamanda cathartica, campanilla, kampanero, goldfen trumpet.
•"Yellow bell" is a shared common name by (1) Allamanda cathartica (2) Allamanda neriifolia, and (3) Tecoma stans.
• Some compilations list Allamanda cathartica and Allamanda nerifolia as synonyms; others as separate species, but sharing in many of the common names.



Botany
The plant is a glabrous perennial shrub growing to a height of 1.5 meters, with a milky sap and sometimes scandent branches. Leaves are narrow, opposite or whorled, 2-5 at each nod, 8-10 cm long, 2-3 cm wide. Inflorescence is paniculate. Flowers are bell-shaped with a golden yellow corolla, striped orange at the throat, up to 6 cm across, with a short and swollen tube, angular at the base. Fruit is a globose and prickly capsule.

Distribution
Recently introduced.
Ornamental cultivation.
Propagated by stem cuttings.
Found wild in thickets.

Uses
Folkloric
• No known folkloric medicinal use in the Philippines.

Concerns
• Milky and irritant sap.
• Skin contact may cause dermatitis.
• Reports of diarrhea or vomiting with ingestion of plant parts.

Studies
• Protoplumericin / Iridoid Bis-glucoside: Study isolated protoplumericin, 13-O-(ß-D-glucopyranosyl-p-coumaroyl)-plumieride, from the methanolic extract of A neriifolia.
• Anti-Proliferative / Cytostatic / Cytotoxic: Study evaluated the anti-proliferative effect of A schottii and A blanchetti ethanolic extracts on K562 leukemic cells. The root extract of A schottii showed to be the most active, showing dose-dependent cytostatic and cytotoxic effect.
• Anti-Viral / Anti-Rabies: Study of South American extracts and fractions showed Alamanda schottii had a selectivity index (SI) of 5.6 against rabies virus and antirabies activities.

Availability
Wild-crafted.


Photos © Godofredo Stuart / StuartXchange

Additional Sources and Suggested Readings
(1)
Protoplumericin, an Iridoid Bis-glucoside in Allamanda neriifolia / Yamauchi Tatsuo et al / Chemical & pharmaceutical bulletin, 29(10) pp.3051-3055 19811025
(2)
Bioactive components of Allamanda schottii. / Anderson JE, Chang CJ, Mclaughlein JL (1988) / J Nat Prod 51: 307
(3)
Evaluation of the anti-proliferative effect the extracts of Allamanda blanchetti and A. schottii on the growth of leukemic and endothelial cells / Dionezine de F Navarro Schmidt et al / J Pharm Pharmaceut Sci (www.cspscanada.org) 9(2):200-208, 2006
(4)
Evaluation of Antiviral Activity of South American Plant Extracts Against Herpes Simplex Virus Type 1 and Rabies Virus / Vanessa Muller et al / PHYTOTHERAPY RESEARCH / DOI: 10.1002/ptr.2198

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