Origin and Common Names
Ranunculus aquatilis L. var. lalondei L. Benson, commonly known as Lalonde's Water Crowfoot, is a perennial aquatic plant belonging to the family Ranunculaceae. It is native to North America and can be found in freshwater habitats, such as ponds, lakes, and slow-moving streams.
General Appearance
The plant has submerged or floating leaves that are finely dissected and feather-like in appearance. The leaves are arranged in whorls of three to five and can grow up to 3 cm in length. The stems are thin and can grow up to 90 cm in length. The flowers are small, white, and have five petals. They bloom from May to August and are held above the water surface on slender stalks. The plant also produces small, green fruits called achenes that contain seeds.
Uses
Lalonde's Water Crowfoot serves as an important habitat for aquatic insects and other invertebrates that are food sources for fish and other aquatic animals. It also helps to stabilize shorelines and reduce erosion by absorbing wave energy and trapping sediment. Due to its attractive appearance, Lalonde's Water Crowfoot is sometimes used as an ornamental plant in water gardens and ponds.
Light Requirements
The Ranunculus aquatilis L. var. lalondei L. Benson prefers to grow in areas with partial to full sun exposure. In natural habitat, it usually grows near the edges of ponds or streams which receive plenty of sunlight.
Temperature Requirements
The Ranunculus aquatilis L. var. lalondei L. Benson thrives in temperatures ranging from 5-20 °C. It can tolerate cold conditions as well as warm temperatures, but prefers cooler environments. The plant can grow in USDA hardiness zones 5 to 10.
Soil Requirements
The Ranunculus aquatilis L. var. lalondei L. Benson prefers to grow in moist soil with a pH range of 6.0 to 7.5. It can also tolerate growing in soil with a slightly acidic to slightly alkaline pH. The water should not be stagnant and the soil should have good drainage. Loamy soil with added organic matter is best suited for this plant.
Cultivation methods
Ranunculus aquatilis L. var. lalondei L. Benson is a versatile plant that can be grown in various settings, including ponds, streams, or aquariums. The ideal water temperature for its growth is between 60°F-75°F. It requires a minimum of 4 hours of sunlight and can grow up to a depth of 6 feet.
Watering needs
The Ranunculus aquatilis L. var. lalondei L. Benson is an aquatic plant that grows in water. It does not need watering in the traditional sense. However, it is essential to ensure that the water conditions are appropriate for the plant's growth.
Fertilization
The Ranunculus aquatilis L. var. lalondei L. Benson requires regular fertilization to promote healthy growth. The ideal fertilizer for this plant is one that is high in potassium and phosphorus. The recommended dosage is once every two weeks during the growing season.
Pruning
Pruning is not necessary for Ranunculus aquatilis L. var. lalondei L. Benson. However, it is advisable to remove any dead or decaying parts to prevent them from affecting the plant's overall health. Additionally, removing any excess vegetation helps to maintain a healthy water balance and prevent overcrowding.
Propagation of Ranunculus aquatilis L. var. lalondei L. Benson
Ranunculus aquatilis L. var. lalondei L. Benson, commonly known as the river water-crowfoot, is a perennial plant that belongs to the buttercup family.
There are two primary methods for propagating Ranunculus aquatilis L. var. lalondei L. Benson:
1. Seed Propagation
The most common method for propagating river water-crowfoot is through seed propagation. The seeds of this plant can be sown directly in the ground during the fall or spring seasons. Seeds should be sown about 1/8 inch deep and spaced about 6 inches apart.
It is important to keep the soil consistently moist and to provide the seedlings with ample sunlight. You can expect to see new growth within a few weeks.
2. Division
Ranunculus aquatilis L. var. lalondei L. Benson can also be propagated through division, which involves separating an established plant into smaller sections and replanting them. This method is best done during the fall or spring when the plant is not in bloom.
To propagate through division, dig up the entire plant and carefully separate the roots into sections. Each section should have at least one healthy stem and root system. Replant the sections in a well-draining soil medium and water thoroughly.
It is important to note that Ranunculus aquatilis L. var. lalondei L. Benson can be invasive in some regions, and caution should be exercised when propagating this plant.
Disease Management
Like most plants, Ranunculus aquatilis L. var. lalondei L. Benson is susceptible to different diseases. Here are common diseases that can affect this plant and ways to manage them:
Pythium Root Rot
Pythium root rot is a water-borne disease that can cause the plant's roots to rot, leading to stunted growth, yellowing, and wilting. To manage Pythium root rot, make sure to avoid over-watering or poorly-draining soils. You can also use fungicide treatments to prevent and manage this disease.
Botrytis Blight
Botrytis blight is a fungal disease that can cause brown spots on the plant's leaves and stems. The disease can be managed by removing infected plant parts, sanitizing tools, and ensuring proper air circulation to prevent the buildup of moisture. Fungicide treatments can also help control and prevent Botrytis blight.
Leaf Spot
Leaf spot is a fungal disease that causes circular or irregular brown spots on the plant's leaves. To manage leaf spot and prevent its spread, remove infected areas and ensure that the plant is not overcrowded. Using fungicide treatments and watering the plant at the base (rather than overhead) can also help manage this disease.
Pest Management
Several pests can attack Ranunculus aquatilis L. var. lalondei L. Benson. Here are some common pests and ways to manage them:
Aphids
Aphids are small, pear-shaped insects that can suck the sap from plant leaves and stems, causing wilting and yellowing. To manage aphids, prune and destroy infested areas of the plant. You can also use insecticidal soaps or oils to control and prevent aphid infestations.
Spider Mites
Spider mites are tiny pests that can spin webs on the plant's leaves and stems and feed on their sap, causing yellow and brown discoloration. To manage spider mites, remove infected plant parts and use insecticidal soaps or oils to control and prevent infestations. Ensure adequate plant hydration to prevent dry conditions that favor spider mites.
Thrips
Thrips are small, slender insects that feed on the plant's leaves and flowers, causing distorted growth and browning. To manage thrips, remove and dispose of infested plant parts, and introduce biological controls like predators and parasitoids. You can also use insecticidal soaps or oils to control and prevent thrips infestations.
