Origin
Thelypodium lasiophyllum (Hook. & Arn.) Greene var. rigidum (Greene) B.L. Robins., commonly known as Thickstem thelypody, is a native flowering plant species found in North America.
Common Names
The plant is commonly known as Thickstem thelypody owing to its thick stem and leaves that are quite hairy in appearance.
Uses
The Thickstem thelypody is primarily used for ornamental purpose. The plant's bright yellow flowers, which bloom in early summer, generate a striking visual effect in any garden. This plant also attracts a diverse range of insects, including bees, butterflies, and beetles that help to pollinate it.
Additionally, historically, some Native American tribes used the thelypody species of plants for medicinal purposes. Its roots were used to treat coughs and fever, while the leaves and stems were infused to make tea.
General Appearance
The Thickstem thelypody plant grows in a dwarf, clumping rosette form and can span up to 6 inches in height. The plant can thrive in both dry, rocky areas and dampish areas, including mountain slopes, prairies, and rocky outcroppings. Characteristic of the Brassicaceae family, this plant has four distinct yellow petals and six long stamens that protrude from the flower center. Its leaves and stems are hairy, with a grey-green coloration, which makes the plant's white flowers and vibrant yellow petals more pronounced.
Light Requirements
Thelypodium lasiophyllum var. rigidum requires full sunlight for optimal growth. The plant cannot thrive in areas with partial shade or complete shade. Therefore, it is best to plant the species in a location where it receives direct sunlight for at least six hours each day.
Temperature Requirements
Thelypodium lasiophyllum var. rigidum is a hardy plant that can withstand extreme temperature fluctuation. It is adapted to growing in temperate regions with an average temperature range of 10-25°C. The plant can grow in areas with temperatures as low as -12°C in winter and as high as 35°C in summer.
Soil Requirements
The species requires well-drained, nutrient-rich, and moist soils. It can adapt to a wide range of soil types from sandy loam to clay soils. However, it grows best in soils with a pH range of 6.0 to 7.5. It is also important to note that the plant can tolerate occasional flooding but cannot survive in waterlogged soils.
Cultivation methods:
To cultivate Thelypodium lasiophyllum var. rigidum, it is essential to provide the plant with the necessary growing conditions to thrive. This plant prefers full sun, but it can also tolerate partial shade. The ideal soil type is well-draining soil, with a pH range of 6.5 to 7.5. It is vital to ensure that the soil is not waterlogged as this can lead to damage to the roots and ultimately, the death of the plant.Watering needs:
Watering is crucial in the care of Thelypodium lasiophyllum var. rigidum. The plant requires moderate watering and can tolerate drought conditions. It would be best to water the plant deeply, allowing the soil to dry out between watering intervals. It is best to avoid overwatering as this can lead to root rot that can cause extensive damage to the roots.Fertilization:
Thelypodium lasiophyllum var. rigidum is not a heavy feeder, so fertilization is not a crucial aspect of cultivation. However, it would be best to apply a balanced fertilizer during the active growing season, usually in spring and summer. The fertilizer application should follow the manufacturer's instructions with application timing and rate.Pruning:
Pruning is not necessary for Thelypodium lasiophyllum var. rigidum. However, deadheading or removing the spent blooms can help to encourage new growth and prolong the blooming season. It would be best to use clean, sharp pruning shears to prevent any damage to the plant. Additionally, pruning in late autumn or early spring can help in the control of the plant's growth and shape.Propagation of Thelypodium lasiophyllum var. rigidum
Thelypodium lasiophyllum var. rigidum, commonly known as Thickstem Encelia or Desert Trumpet, is a herbaceous perennial plant that belongs to the Asteraceae family. It is native to the western United States, particularly in Arizona, California, Nevada, and Utah. Propagation of Thelypodium lasiophyllum var. rigidum can be done in several ways, such as seed propagation, stem cuttings, and division.
Seed propagation
Thelypodium lasiophyllum var. rigidum commonly reproduces through seed propagation. The seeds of this plant are small and can be harvested in the fall. They should be sown in the spring when the soil is moist. The seeds can be sown in pots or directly in the ground at a depth of about 1/8 inch. The soil should be well-drained, rich in nutrients, and sunny. The seeds will germinate within a few weeks, and seedlings can be transplanted once they have grown a few inches.
Stem cuttings
Stem cuttings can also be used to propagate Thelypodium lasiophyllum var. rigidum. This method is useful when a quick increase in the number of plants is needed. Cuttings should be taken in the summer when the plant is actively growing. Cuttings should be about 6 inches long and should be taken from the softwood portion of the stem. The cuttings should be dipped in rooting hormone and planted in potting soil. The soil should be kept evenly moist, and the cuttings should be kept out of direct sunlight. The cuttings will root within a few weeks.
Division
Division is another propagation method for Thelypodium lasiophyllum var. rigidum. This method works best for mature plants that have grown too large or have become overcrowded. In the fall, plants should be dug up, and the root system should be gently separated into smaller sections. Each section should have a few stems and healthy roots. These smaller sections can then be replanted in a new location, and they will establish themselves within a few weeks.
Disease Management
Thelypodium lasiophyllum var. rigidum is generally considered to be a hardy plant and not prone to many diseases. However, there are a few diseases that can affect this plant:
- Black spot: This fungal disease appears as black spots on leaves and can cause them to drop prematurely. To manage this disease, remove infected leaves and avoid overhead watering. Fungicides can also be effective if applied according to instructions.
- Powdery mildew: This fungal disease appears as a white powdery substance on leaves and stems. To manage this disease, remove infected plant parts and avoid overhead watering. Fungicides can also be effective if applied according to instructions.
- Root rot: This fungal disease attacks the roots of the plant, causing them to decay and the plant to wilt. To manage this disease, avoid overwatering and improve soil drainage. Fungicides can also be effective if applied according to instructions.
Pest Management
Thelypodium lasiophyllum var. rigidum is not typically prone to pest problems. However, there are a few pests that can affect this plant:
- Aphids: These small, soft-bodied insects feed on plant sap and can cause distortion and yellowing of leaves. To manage aphids, spray the plant with a strong stream of water to dislodge them, or use insecticidal soap according to instructions.
- Thrips: These tiny insects feed on leaves and flowers, causing damage and discoloration. Manage thrips by removing infested plant parts and using insecticidal soap or other pesticides according to instructions.
- Spider mites: These tiny pests feed on plant sap and cause webbing, stippling, and discoloration of leaves. Manage spider mites by removing infested plant parts and using insecticidal soap or neem oil according to instructions.
