Oblong-leaved sundew

The oblong-leaved sundew (Latin: Drosera intermedia) is a carnivorous perennial herb belonging to the Droseraceae family. As a highly specialized botanical species, it thrives in nutrient-poor wetland habitats, utilizing its predatory mechanism to derive essential nitrogen and minerals from insect prey trapped on its glandular leaves.

The species has an extensive distribution range, spanning parts of Europe, North America, and South America. Historically, it is found in oligotrophic habitats such as peat bogs and wet sandy shores. Its survival depends on stable hydrological conditions, which are critical for both its physiological processes and its propagation in artificial environments.

Botanically, the plant is characterized by a stemless rosette of spatulate leaves that are covered in sticky, mucilage-secreting trichomes. When an insect lands on a leaf, the adhesive substance prevents escape, and subsequent enzyme production allows for nutrient absorption. Its inflorescences typically produce five-petaled white flowers that rise above the rosette.

Cultivation requirements are strict and differ significantly from standard agricultural practices. The plant necessitates a substrate composed primarily of acidic peat or long-fibered sphagnum moss. It is extremely sensitive to dissolved solids; therefore, only distilled or deionized water should be used for irrigation. Sunlight exposure must be abundant to maintain the plant's characteristic coloration and vigor.

• Requires high humidity and moisture levels constantly.
• Avoid mineral fertilizers as they are toxic to the plant.
• Maintained pest control for aphids is necessary.
• High sunlight intensity is required for optimal growth.

In terms of economic and practical use, Drosera intermedia is primarily maintained in botanical collections and nurseries specializing in rare wetland flora. Diseases such as fungal rot are the most common challenges faced by growers, usually caused by improper aeration or stagnant water. Vigilant monitoring for pests and precise environmental control remain the pillars of successful management.