Description of Lasthenia glabrata Lindl. ssp. glabrata
Lasthenia glabrata Lindl. ssp. glabrata, commonly known as common goldfields, is a low-growing annual plant that belongs to the sunflower family, Asteraceae. It is native to California, specifically to the Central Valley, Central Coast, South Coast, and Western Transverse Ranges.
Appearance of Lasthenia glabrata Lindl. ssp. glabrata
Common goldfields typically grow up to 6-12 inches tall and can spread up to 12-18 inches wide. The plant has multiple branches with leaves that are green and thread-like. The plant's flowers are small, with yellow petals that surround a central disk. The flowers typically bloom from March to July.
Uses of Lasthenia glabrata Lindl. ssp. glabrata
Common goldfields are typically used for soil stabilization in areas that are prone to erosion. They are also a popular plant used for ecological restoration due to their ability to quickly establish a large root network, which can help prevent soil erosion and promote the growth of other plants. Additionally, they are occasionally used in landscaping for their attractive yellow flowers.
In traditional Native American medicine, common goldfields were used to make poultices for wounds and rashes. They were also steeped in water to make a tea that was believed to cure stomach ailments.
Growth Conditions of Lasthenia glabrata Lindl. ssp. glabrata
When it comes to the growth conditions of Lasthenia glabrata Lindl. ssp. glabrata, several factors play a crucial role in determining its growth and vitality. The following are some of the typical growth conditions that this plant requires to thrive:
Light Requirements
As a flowering plant, Lasthenia glabrata Lindl. ssp. glabrata requires an optimal amount of sunlight to grow and bloom. It usually prefers full sun to partial shade exposure, making it ideal for gardens, meadows, and natural areas where the plant can receive ample sunlight. Insufficient sunlight can negatively impact this plant's growth, leading to stunted plants, pale leaves, and fewer flowers.
Temperature Requirements
Lasthenia glabrata Lindl. ssp. glabrata is adapted to grow in Mediterranean climates, making it relatively tolerant of mild seasonal variations in temperature. Generally, this plant thrives in temperatures ranging from 10 to 30°C. However, in extreme heat, the plant can become heat-stressed and may require watering to keep them hydrated. Similarly, in cold temperatures, it may be necessary to provide frost protection to prevent freezing and frost damage.
Soil Requirements
Soil is an essential factor when it comes to Lasthenia glabrata Lindl. ssp. glabrata growth conditions. This plant thrives in well-drained soils that are fertile and rich in organic matter. It prefers a soil pH range of 6 to 7.5. Heavy, compacted, or poorly drained soils can negatively impact this plant's growth, leading to root rot, stunted growth, and yellowing leaves. Therefore, it's crucial to prepare the soil by incorporating organic matter to promote better aeration, drainage, and nutrient uptake.
In conclusion, to ensure a successful growth and development of Lasthenia glabrata Lindl. ssp. glabrata, it's essential to provide the plant with adequate sunlight, moderate temperatures, and well-drained fertile soils enriched with organic matter.
Cultivation of Lasthenia glabrata Lindl. ssp. glabrata
Lasthenia glabrata Lindl. ssp. glabrata grows well in a wide range of soil types, but the preferred soil is sandy or loamy soil. It requires minimum rainfall, and the plant thrives optimally in full sunlight, although it can also tolerate partial shade.
The plant grows well, both in greenhouses and outdoor gardens. Planting can occur in either the fall or spring. Sow the seeds about 1/8 inch deep and keep the seedbed moist until the seeds germinate.
Watering Needs
Once established, Lasthenia glabrata Lindl. ssp. glabrata is relatively drought tolerant. That being said, it is essential to water the plant regularly during the dry season, especially if the plant is grown in a container. The soil must be maintained moist but not overly wet to prevent root rot.
Fertilization
It is recommended to fertilize the plant in the spring when the plant begins to show signs of new growth. Use a slow-release, balanced fertilizer and follow the instructions on the package. Over-fertilization can lead to poor growth and susceptibility to diseases.
Pruning
Lasthenia glabrata Lindl. ssp. glabrata does not require heavy pruning. However, it is a good practice to remove dead flowers and foliage regularly, keeping the plant neat and presentable. Pinching the plants helps encourage branching, producing more flowers.
Propagation of Lasthenia glabrata Lindl. ssp. glabrata
Lasthenia glabrata Lindl. ssp. glabrata, commonly known as Yellowray goldfields, is a herbaceous annual plant that belongs to the sunflower family (Asteraceae). It is native to California, USA, and it grows up to 30 cm tall. This plant is known for its bright yellow flowers that bloom from March to May.
Propagation of L. glabrata can be done by seeds or cuttings. The following are the two common propagation methods:
Seed Propagation
The most common and successful method of propagating L. glabrata is by seed. The plant produces a significant amount of seeds, which can be collected from the dried flower heads. Once the seeds are collected, they can be stored in a cool and dry place for up to two years before planting. The ideal time to plant L. glabrata seeds is in fall, before the winter rains. The following steps can be followed:
- Prepare the soil by removing any weeds or debris.
- Scatter the seeds on the soil lightly and cover them with a thin layer of soil.
- Water the planted area well.
- The seedlings will begin to appear within two weeks.
- Thin the seedlings to a distance of 15 cm apart to give room for growth.
Propagation by Cuttings
Propagation by cuttings is less common and may not always be successful. However, it can be done by following these steps:
- Take cuttings from the mature plant in late summer when the plant is blooming.
- Remove the leaves from the bottom third of the cutting.
- Plant the cutting in a well-draining soil mixture.
- Water the cutting well and place it in a partially shaded area.
- Roots should begin to grow in four to six weeks.
- The rooted cutting can then be transplanted to its desired location in the garden.
Propagation of Lasthenia glabrata Lindl. ssp. glabrata is relatively easy, and it does not require any special knowledge or skills. With appropriate care, the plant will grow and flourish, bringing its vibrant yellow flowers in spring.
Disease Management
The Lasthenia glabrata Lindl. ssp. glabrata plant is susceptible to various diseases that can affect its growth, yield, and overall health. Some of the common diseases that affect this plant include:
- Stem canker: This fungal disease causes dark lesions on the stem, which can lead to stem girdling and plant death. To manage this disease, remove infected plant parts and apply fungicide to prevent the spread of the disease.
- Rust: This fungal disease causes yellowish-orange pustules on the leaves, leading to defoliation and stunted growth. Remove infected plant parts and apply fungicide to control the disease.
- Bacterial blight: This bacterial disease causes water-soaked spots on the leaves, which turn brown and eventually die. Remove infected plant parts, and apply copper-based fungicides to manage the disease.
- Verticillium wilt: This fungal disease causes yellowing and wilting of the leaves, followed by plant death. Remove infected plant parts and apply fungicide to control the disease.
Pest Management
The Lasthenia glabrata Lindl. ssp. glabrata plant is also vulnerable to a range of pests that can cause damage to the plant. Some of the common pests that may affect this plant include:
- Aphids: These small, soft-bodied insects can cluster on the leaves of the plant, causing stunted growth and foliage curl. Use a strong jet of water to wash off the insects, or apply insecticidal soap to manage the pest.
- Spider mites: These tiny arachnids can cause leaf yellowing and stippling, leading to defoliation. To control spider mites, apply insecticidal soap or neem oil to the plant.
- Thrips: These small, slender insects can cause leaf deformation and discoloration, leading to reduced growth and yield. Use yellow sticky traps or apply insecticidal soap to control thrips.
- Cutworms: These caterpillar pests can cut the stem of the plant or chew through the roots, causing the plant to wilt and die. To manage this pest, use barriers around the base of the plant or apply insecticides containing Bacillus thuringiensis.
