Cuphea anagalloidea

Geographical Origin and Habitat: Cuphea anagalloidea is native to the Americas, particularly within the tropical and subtropical regions of Central and South America. In the wild, it colonizes sandy riverbanks, marshlands, and seasonally flooded soils, growing predominantly in emersed form and adapting to submerged life during flood periods. It inhabits clear, soft, acidic, and highly sunlit waters, where direct sunlight stimulates its distinct protective

Color & Texture: ation.

Taxonomy & Genetics: It belongs to the Lythraceae family, genus Cuphea. Sometimes incorrectly commercialized under obsolete synonyms or mistaken for Rotala or Bacopa species, it is a distinct plant characterized by short, opposite leaves. Genetically, its ability to synthesize high concentrations of red pigments (carotenoids and anthocyanins) is a protective adaptation against intense solar radiation in shallow waters.

Physical Structure: It features an erect and highly branched stem structure if pruned regularly. The stems are thin but rigid, with opposite and decussate foliage. The leaves are small, sessile, rounded to ovate in shape, and measure just 1-2 cm in length. The root system is fibrous and delicate, serving mainly as anchorage while the plant absorbs most nutrients through its leaves.

Color & Texture: Under optimal cultivation conditions, the leaves assume a spectacular coloration ranging from golden orange to brick red or bright fiery red, especially near the growing tips. Under weak light or with excess nitrates, the color quickly shifts to yellowish-green. The leaf texture is smooth, soft, and extremely compact, creating a very dense, colorful cushion.

Lighting & CO2: Requires very intense lighting. Without strong light, it loses its red coloration and the stems tend to decay. Constant CO2 injection (at least 20-30 mg/L) is essential to support photosynthesis and ensure healthy, branched development of this demanding species.

Nutrition & Substrate: Nutrient uptake occurs mainly through the

Water Chemistry: Prefers soft, acidic water. The ideal KH is between 0 and 7 dKH, with an acidic or neutral pH (4.5-7.0). It is sensitive to hard, calcareous water. The optimal cultivation temperature is between 20°C and 26°C.

Space Management & Placement: Due to its compact size, it is perfect for the midground or foreground in nano or medium-sized aquariums. It should be planted in dense, small groups, spacing individual stems about 1 cm apart to prevent lower leaves from being shaded. It serves as a fantastic color accent point.

Pruning: Pruning is done by trimming the tops of the main stems. The plant responds by producing numerous lateral shoots that create a bushy growth. The cut tops can be replanted directly into the substrate to propagate, where they will quickly develop new roots.

Risks & Diseases: It is a delicate plant and sensitive to sudden nutrient changes or lack of CO2, which can cause growth stunts and lower leaf loss. The surface of the short leaves can collect dust and organic debris if the water flow is poor, promoting filamentous algae.