Oxalis megalorrhiza is a distinctive perennial herb known for its large, fleshy, tuberous roots. Common names include Fleshy Yellow Sorrel or Megalorrhiza Oxalis. Belonging to the Oxalidaceae family, its scientific name directly translates to “with big root.”
Identifying Oxalis megalorrhiza
Identification of Oxalis megalorrhiza focuses on its unique root system and other physical characteristics. The plant has trifoliate leaves, meaning they are composed of three leaflets, similar to clover. These leaflets are fleshy, deep green, and often obcordate in shape. The leaves form a small clump and close in the evening, reopening in the morning.
Its flowers are distinctly yellow, appearing in umbel-like cymes, which are clusters of one to three flowers. Blooming occurs from spring through autumn. The defining characteristic is its robust, swollen rootstock, often described as caudiciform. This fleshy, cylindrical root can reach up to 3 centimeters in thickness and 20 centimeters in length, sometimes branching. This differentiates it from many other Oxalis species.
Where Oxalis megalorrhiza Grows
Oxalis megalorrhiza is indigenous to various regions of South America, including Bolivia, Chile, Ecuador, Peru, Argentina, and the Galapagos Islands. It is commonly found in rocky coastal soils, suggesting a preference for well-drained substrates.
Beyond its natural habitat, Oxalis megalorrhiza can also be encountered in disturbed areas such as open woods, meadows, and agricultural fields. Its ability to spread quickly, partly due to exploding seed capsules, allows it to establish itself in new locations. Its adaptable nature and efficient seed dispersal contribute to its wider distribution.
Managing Oxalis megalorrhiza
Managing Oxalis megalorrhiza, particularly when it establishes itself in cultivated gardens or agricultural settings, presents unique challenges due to its robust growth habits. The primary difficulty stems from its large, persistent tuberous root system, which can regenerate if not entirely removed. Manual removal is a highly effective strategy, but it requires diligent effort to ensure the complete extraction of the thick, fleshy root. Any fragments left behind can lead to regrowth, making thoroughness essential.
To further suppress its growth, applying a thick layer of organic mulch can be beneficial. Mulch helps to smother emerging seedlings and and reduce the plant’s access to light. Additionally, regular monitoring and prompt removal of young plants before they develop extensive root systems or produce seeds are important. The plant’s ability to spread rapidly through exploding seed capsules means that preventing seed set is a crucial step in long-term management. Consistent attention to these methods helps in controlling its spread.
Potential Uses of Oxalis megalorrhiza
Oxalis megalorrhiza offers some potential uses, primarily centered around the edibility of its plant parts. Both the leaves and flowers of this species are considered edible and can be incorporated into salads. The foliage is known to have an acidic taste, attributed to its richness in oxalic acid. This tart flavor can add a unique zest to culinary preparations.
Historically, various Oxalis species, including those with tuberous roots, have been consumed in traditional diets. While the leaves and flowers are edible, it is important to ensure proper identification of the plant before consumption. Some sources also suggest Oxalis megalorrhiza can be grown as an ornamental plant, especially appreciated for its distinctive caudiciform root, making it a unique addition to succulent collections or as a ground cover.