Overview
Eriogonum inerme (S. Wats.) Jepson ssp. hispidulum (Goodman) Munz, commonly known as Hairy cushion buckwheat, is a perennial plant species endemic to California, United States. It is a member of the buckwheat family (Polygonaceae) and is commonly found in the coastal sage scrub, chaparral, and deserts of California.
Description
Hairy cushion buckwheat is a small shrub that grows up to a height of 20-30 centimeters. The plant is characterized by a dense, cushion-shaped growth habit, which provides a suitable habitat for small animals and insects. The leaves of the plant are small, silver-gray and oval-shaped, measuring 3-5 millimeters long and 2-3 millimeters wide. The foliage of the plant is covered with minute hairs, hence the common name "Hairy cushion buckwheat."
Uses
Eriogonum inerme (S. Wats.) Jepson ssp. hispidulum (Goodman) Munz is a valuable plant species, known for its significant ecological characteristics. The plant is used as a nectar source by several butterfly species, including the Acmon blue butterfly (Plebejus acmon) and the Elf butterfly (Microtia elva). The plant is also used by bees, wasps, and other pollinators as a source of pollen and nectar. Hairy cushion buckwheat is also used in erosion control and habitat restoration projects due to its drought tolerance and ability to grow in harsh conditions.
General Appearance
Hairy cushion buckwheat has a unique, cushion-shaped appearance with small, silver-gray, oval leaves. The dense foliage is covered with minute hairs, which gives the plant a "hairy" appearance. The plant flowers from June to August, producing small clusters of white to pinkish flowers, each measuring about 2-3 millimeters in diameter. The flowers are borne on erect stems that rise from the base of the plant.
Light Requirements
Eriogonum inerme ssp. hispidulum is a sun-loving plant that requires full sun exposure to thrive.
Temperature Requirements
This plant prefers warm and dry climates and can tolerate temperatures ranging from -3°C to 40°C.
Soil Requirements
The plant prefers well-drained sandy or gravelly soils and can survive in a variety of soil types, including loamy or clay soils.
However, it cannot tolerate excessive moisture and requires moderate to low levels of soil fertility.
Cultivation Methods for Eriogonum inerme ssp. hispidulum
Eriogonum inerme ssp. hispidulum grows well in well-draining soils, preferably sandy or loamy. Choose a location with full sun exposure as this plant requires at least eight hours of direct sunlight every day. Sow the seeds in early spring or late fall after the last frost when the soil is moist enough.
Watering Needs for Eriogonum inerme ssp. hispidulum
Watering is essential for the growth and development of this plant. However, it is better to avoid overwatering as it may lead to root rot. Water deeply once a week during the growing season and avoid wetting the foliage. During the dormant season, reduce water frequency to once a month.
Fertilization for Eriogonum inerme ssp. hispidulum
Fertilize Eriogonum inerme ssp. hispidulum once or twice per year during the growing season, usually in spring or summer. Use a balanced fertilizer that contains equal amounts of nitrogen, phosphorus, and potassium. Apply the fertilizer according to the manufacturer's instructions and water thoroughly after fertilizing.
Pruning for Eriogonum inerme ssp. hispidulum
Pruning is not necessary for Eriogonum inerme ssp. hispidulum. However, you can trim back the plant after flowering to keep the growth uniform and tidy. Remove any dead or damaged branches and any flowers that are past their prime.
Propagation of Eriogonum inerme (S. Wats.) Jepson ssp. hispidulum (Goodman) Munz
Eriogonum inerme (S. Wats.) Jepson ssp. hispidulum (Goodman) Munz, commonly known as Hairy wild buckwheat, is a native plant species found in California. Propagation of this species can be done through seeds and cuttings.
Propagation by Seeds
The seeds of Eriogonum inerme can be collected from the plant during the fall season, once they have ripened. The seeds require a period of stratification to germinate, which means they need exposure to cold temperatures. Therefore, it is best to plant the seeds in the fall directly in their permanent growing location in the garden. If planting in pots, then the seeds can be kept in the fridge for a month prior to sowing in the spring. The seeds should be planted in well-draining soil and kept moist until germination, which can take up to 6 weeks.
Propagation by Cuttings
Eriogonum inerme can also be propagated through stem cuttings. The best time for collecting the cuttings is in the spring. The cuttings should be about 4 to 6 inches long and taken from the tip of the stem. Remove the leaves from the bottom half of the cutting and dip the cut end in rooting hormone powder before planting it in moist soil. Cover the pot with clear plastic to create humidity and place it in a spot that receives bright, indirect sunlight. Keep the soil moist and wait for roots to form, which can take up to 8 weeks. Once roots have formed, the new plants can be transplanted into their final growing location.
Disease Management for Eriogonum inerme (S.Wats.) Jepson ssp. hispidulum (Goodman) Munz
Eriogonum inerme (S. Wats.) Jepson ssp. hispidulum (Goodman) Munz is a hardy plant that is typically resistant to diseases. However, like any other plant, it is still susceptible to certain diseases. Some of the common diseases that might affect this plant include:
- Root and Crown Rot: This disease is caused by fungi and can be encouraged by overwatering. To manage this disease, avoid overwatering the plant and make sure the soil is well-draining. If the plant is already infected, consider using a fungicide.
- Leaf Spot: This is caused by fungi and is characterized by yellow, brown, or black spots on the leaves. To manage this, remove the infected parts of the plant and dispose of them. Avoid watering the plant overhead, and apply fungicide if necessary.
- Powdery Mildew: This is a fungal disease that appears as a white or gray powder on the leaves of the plant. To manage this disease, make sure the plant is well-ventilated and avoid watering the plant overhead. Apply fungicide if necessary.
Pest Management for Eriogonum inerme (S.Wats.) Jepson ssp. hispidulum (Goodman) Munz
Eriogonum inerme (S. Wats.) Jepson ssp. hispidulum (Goodman) Munz is also relatively resistant to pests. However, it can still be affected by some common pests, such as:
- Aphids: These are tiny insects that suck sap from the plant and can cause leaf curl and yellowing. To manage this, use a stream of water to spray them off the plant or apply insecticidal soap.
- Spider Mites: These pests suck sap from the leaves of the plant and can cause leaf yellowing and webbing. To manage this, apply insecticidal soap or miticide. Make sure to also prune and dispose of any heavily infested parts of the plant.
- Thrips: These insects pierce the leaves of the plant and suck the sap, resulting in silvery, distorted leaves. To manage this, apply insecticidal soap or introduce natural predators such as lacewings or ladybugs.
