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Ammannia gracilis

Family Name: Lythraceae
Full Sun: 6-8h Lots of Water Ornamental Flowers Ornamental Foliage Aquatic &Hydrophyte Woody Herbaceous


Family Name
Genus Epithet
Species Epithet
Name Status (botanical)

Classifications and Characteristics

Plant Division Angiosperms (Flowering Seed Plants)
Plant Growth Form Shrub (Herbaceous), Aquatic & Hydrophyte (Emergent)
Lifespan (in Singapore) Perennial
Mode of Nutrition Autotrophic


Native Distribution West Africa
Native Habitat Aquatic (Freshwater Pond / Lake / River)
Local Conservation Status Exotic

Description and Ethnobotany

Growth Form A herbaceous shrub with an emergent and submerged growth form. It has an upright growth form. 
Foliage The simple, sessile leaves are arranged in opposite pairs along the stems. The leaves are ovate-lanceolate in shape and have an entire margin with a slightly undulating edge, the emersed leaves being more firm than the submersed leaves. The submerged leaves turn red in water conditions with high phosphate and low nitrate levels. 
Flowers The flowers are purple in colour and are borne in the axillary leaf nodes in clusters. 
Cultivation It is best grown under full sun or high light conditions and grows best in water temperatures of 25 to 30°C and soil pH levels of 6.5 to 7.2 (mildly acidic). The plant cannot tolerate hard water. In aquascapes, the plant should be pruned when the stem touches the water surface so as to encourage growth from the lateral shoots. 

Landscaping Features

Landscaping In aquascapes, it is ideal as a mid to background plant and are used to add a contrast to the green tones in a aquascape. 
Desirable Plant Features Ornamental Flowers, Ornamental Foliage
Plant & Rootzone Preference - Tolerance Waterlogged Soils, Acidic (low pH) Soils
Landscape Uses Parks & Gardens, Small Gardens, Aquarium / Aquascape
Thematic Landscaping Water Garden

Plant Care and Propagation

Light Preference Full Sun
Water Preference Lots of Water
Plant Growth Rate Fast
Propagation Method Stem Cutting (Herbaceous)

Floral (Angiosperm)

Flower & Plant Sexuality 1 Bisexual Flowers
Flower Colour(s) Purple
Flower Grouping Cluster / Inflorescence
Flower Location Axillary

Image Repository



Master ID 31612
Species ID 6011
Flora Disclaimer The information in this website has been compiled from reliable sources, such as reference works on medicinal plants. It is not a substitute for medical advice or treatment and NParks does not purport to provide any medical advice. Readers should always consult his/her physician before using or consuming a plant for medicinal purposes.
Species record last updated on: 03 December 2021.