Origin
Mentzelia nuda (Pursh) Torr. & Gray var. stricta (Osterhout) Harrington, commonly known as Bractless Blazingstar, originates from North America. The plant can be found in many western states of America, including Colorado, Arizona, Utah, and New Mexico.
Common Names
Aside from Bractless Blazingstar, the plant goes by several common names such as nakedstem blazingstar, stick-leaf, and cramponflower.
Uses
Historically, Native Americans used this plant for medicinal purposes. The roots were utilized as a remedy for respiratory infections by being boiled and mixed with salt and the steam inhaled. Additionally, the dried root of the plant was powdered and taken orally as a remedy for colds.
Today, the plant is mainly grown for its aesthetic appeal. Its bright yellow flowers and tall, slender stem make for an attractive addition to any garden.
General Appearance
Mentzelia nuda (Pursh) Torr. & Gray var. stricta (Osterhout) Harrington is a biennial or perennial plant. Its stem is erect and can grow up to three feet tall. The leaves are alternate and can be up to six inches long. The plant's flowers are bright yellow and can grow up to two inches in length. It blooms from June to August and is pollinated by bees and wasps.
Overall, the Bractless Blazingstar has a distinct appearance and historical use that makes it a unique and valuable plant.
Light
Mentzelia nuda var. stricta commonly grows in areas with direct sunlight exposure. As a result, it is vital to provide the plant with consistent bright, direct sun exposure for optimum growth and flower production.
Temperature
The plant thrives in warm temperatures, averaging between 70°F and 85°F. At temperatures below 60°F, the plant will cease growth and struggle with flower formation. It is important to protect the plant from sudden and extreme temperature changes, as this can highly stress the plant.
Soil
Mentzelia nuda var. stricta grows well in well-draining soils with low to moderate fertility levels. The soil should be sandy and have a pH of 6.8 to 7.2. The plant can tolerate slightly alkaline soils, but heavy clay soils should be avoided as they tend to retain too much water, which can cause plant stress and eventual death. For best results, mix sand, peat moss, or compost into the planting site to improve drainage and provide the needed nutrients for optimum growth and flowering.
Cultivation Methods
Mentzelia nuda (Pursh) Torr. & Gray var. stricta (Osterhout) Harrington is a hardy plant that thrives in full sunlight and well-drained soil. It is best grown in garden beds or containers with good drainage. The seeds of the plant should be sown in spring or early summer, and the seedlings should be transplanted to their growing location after the last frost.
Watering Needs
The plant is drought-tolerant and requires infrequent watering. When watering, it is best to use a deep watering method, allowing the water to penetrate the soil to a depth of at least 6 inches. This will help to promote a strong root system and prevent the plant from becoming too reliant on frequent watering.
Fertilization
The plant does not require frequent fertilization. However, a balanced fertilizer can be applied once a month during the growing season to promote healthy growth. It is important not to over-fertilize, as this can lead to excessive foliage growth and reduced flowering.
Pruning
Mentzelia nuda (Pursh) Torr. & Gray var. stricta (Osterhout) Harrington does not require frequent pruning. However, if the plant becomes overgrown or unruly, it can be lightly pruned to maintain its shape. Pruning should be done after the flowering period to help promote new growth and prevent damage to the plant.
Propagation of Mentzelia nuda (Pursh) Torr. & Gray var. stricta (Osterhout) Harrington
The propagation of Mentzelia nuda (Pursh) Torr. & Gray var. stricta (Osterhout) Harrington can be accomplished using both seeds and stem cuttings. The plant is easy to propagate, and it can readily establish from seed.
Propagation from Seeds
The easiest and most common method of propagating Mentzelia nuda (Pursh) Torr. & Gray var. stricta (Osterhout) Harrington is from seeds. Sow the seeds in well-drained soil, covering them with a layer of soil that is approximately two times their diameter. Water the soil, then cover the container with plastic wrap to help retain moisture. Keep the soil moist and warm at a temperature of around 20°C. The seeds should germinate within two weeks.
Propagation from Stem Cuttings
Mentzelia nuda (Pursh) Torr. & Gray var. stricta (Osterhout) Harrington also can be propagated from stem cuttings. Take a stem cutting that is approximately four inches long, remove the bottom leaves, and dip the cut end in rooting hormone. Plant the cutting in well-draining soil, keeping the soil moist and the cutting in a warm location. The cutting should take root in a few weeks.
Disease Management
Mentzelia nuda (Pursh) Torr. & Gray var. stricta (Osterhout) Harrington is a relatively disease-resistant plant. However, some diseases may affect it, such as:
- Leaf spot: This disease appears as brown or black spots on the leaves, eventually causing them to dry up and fall off. To manage leaf spot, remove the affected leaves and ensure proper air circulation.
- Powdery mildew: A fungal disease that causes white, powdery growth on leaves and stems. To manage powdery mildew, prune infected areas and keep the plant well-ventilated.
- Root rot: This disease is caused by a fungus and affects the roots, causing them to turn brown and mushy. To manage root rot, avoid overwatering and ensure proper drainage.
Pest Management
Although Mentzelia nuda (Pursh) Torr. & Gray var. stricta (Osterhout) Harrington is not particularly susceptible to pests, some may still attack the plant. Common pests that may affect this plant are:
- Aphids: These small insects may suck the sap from the plant, causing leaves to yellow and distort. To manage aphids, use insecticidal soap or neem oil.
- Spider mites: These tiny arachnids may infest the plant, causing leaves to turn yellow and the plant to look dry and withered. To manage spider mites, wash the plant with water or use insecticidal soap.
- Scales: These insects form hard, protective coverings on leaves and stems, sucking sap from the plant. To manage scales, use insecticidal oil or neem oil.
