Origin
Oxytropis glabrata, commonly known as smooth locoweed, is a perennial herbaceous plant native to North America. It can be found in the Rocky Mountains from Alberta to New Mexico and westward to Oregon and Nevada. It grows in dry open areas, including grasslands and sagebrush steppe habitats.
Common Names
In addition to smooth locoweed, Oxytropis glabrata is also known by a variety of common names including Hooker's locoweed, velvetpod locoweed, silky crazyweed, and acute-leaved oxytropis.
Uses
The plant contains compounds that are toxic to livestock, causing a condition known as locoism. However, the plant has also been used in traditional medicine by indigenous peoples to treat a variety of ailments. It has been used to treat infections, inflammation, and as a general analgesic.
General Appearance
Oxytropis glabrata grows 5-25 cm tall and has slender stems that are covered in fine hairs. The leaves are sharply pointed and occur in a basal rosette. The plant produces purplish-pink flowers that are held in elongated clusters at the end of the stems. The flowers develop into elongated, narrow pods that are covered in fine hairs resembling velvet. The plant has a distinctive odor and is easily recognized in its native range.
Light Requirements
The plant Oxytropis glabrata (Hook.) A. Nels. requires full sunlight to grow and thrive. This means that the plant should be placed in an area that receives at least 6 hours of direct sunlight per day. In shaded areas, the plant may grow but it may not flower or produce seeds.
Temperature Requirements
The plant Oxytropis glabrata (Hook.) A. Nels. has adapted to growing in cold climates and can tolerate cold temperatures. It grows best in areas where temperatures range between 10 and 24°C. In warmer climates, the plant may require irrigation to provide enough moisture to keep it healthy.
Soil Requirements
Oxytropis glabrata (Hook.) A. Nels. prefers well-draining, sandy loam soil that is slightly alkaline with a pH range between 6.0 and 7.5. The plant does not prefer acidic soils. It can tolerate dry soil conditions but prefers an area with good drainage. The plant also requires nutrient-rich soil which can be improved by adding compost or fertilization.
Cultivation
Oxytropis glabrata can be grown from seed or propagated by division of established clumps. The plant grows best in well-drained, sandy soil in full sun to partial shade and is tolerant of drought conditions. It is recommended to start the plant from seed in the spring after the danger of frost has passed.
Watering Needs
While Oxytropis glabrata is tolerant of drought conditions, it still requires regular watering to ensure healthy growth. It is important not to overwater the plant as it can lead to root rot. The frequency of watering will depend on various factors such as the climate and soil type. Generally, the plant should be watered deeply once a week during the growing season, and less frequently in the winter months.
Fertilization
Fertilization is not a necessity for Oxytropis glabrata, as it can grow without it, but it can improve growth and flower production. A low-nitrogen fertilizer, such as one with a 5-10-10 ratio, can be applied once in the spring as the plant begins to emerge from dormancy. Avoid over-fertilizing, as it can cause the plant to grow too quickly, leading to weak stems and smaller flowers.
Pruning
Oxytropis glabrata does not require regular pruning, but deadheading spent flowers can encourage a longer blooming period. Cut the spent flower stalks back to where they meet the main stem. It is also beneficial to remove any dead or damaged foliage throughout the growing season to maintain the plant's appearance and health.
Propagation of Oxytropis glabrata
Oxytropis glabrata can be propagated through various methods, including seeds and vegetative propagation.
Propagation by Seeds
Seeds of Oxytropis glabrata can be collected from the mother plant when the seed pods are dry and brown. The seeds should be stored in a cool, dry place until they are ready to be sown.
Sowing the seeds can be done in the spring or the fall. Before sowing, the soil should be prepared by removing any weeds and debris and loosening the top layer of soil to a depth of about 2 inches. The seeds can then be sprinkled on the soil surface and lightly covered with soil. It is important to keep the soil evenly moist until the seeds germinate, which usually takes about 2-3 weeks.
Vegetative Propagation
Oxytropis glabrata can also be propagated through vegetative methods such as stem cuttings and division.
Stem cuttings can be taken from the parent plant in the spring or summer. The cutting should be about 4 inches long and should include at least one set of leaves. The lower leaves should be removed, and the cutting should be dipped in rooting hormone before being planted in a pot filled with moist soil. The pot should be covered with a plastic bag to create a humid environment, and the cutting should be kept in a shaded area until it begins to root, which usually takes about 4-6 weeks.
Division can be done in the spring or fall when the parent plant is dormant. The plant should be carefully dug up, and the root system should be gently pulled apart into smaller sections. Each section should have at least one healthy shoot and a good root system. The sections can then be planted in pots or directly in the ground, and should be watered regularly until they become established.
Disease and Pest Management for Oxytropis glabrata (Hook.) A. Nels.
Oxytropis glabrata, commonly known as smooth oxytrope, is a beautiful perennial plant that is native to North America. It is a hardy and adaptable plant that can grow in various soil types and climatic conditions. However, like all plants, it is susceptible to diseases and pest infestations that can harm its growth and development. Therefore, it is essential to monitor and manage any potential threats to ensure the plant's health and longevity.
Common Diseases
One of the most common diseases that can affect Oxytropis glabrata is root rot. This disease is caused by various fungal pathogens that attack the plant's roots, leading to wilting, yellowing of leaves, and stunted growth. To manage root rot, it is crucial to monitor the soil moisture levels and avoid overwatering the plant. Additionally, applying fungicides and removing infected plant parts can help reduce the spread of the disease.
Another disease that can affect Oxytropis glabrata is powdery mildew. This fungal disease forms white or gray powdery patches on the plant's leaves, stems, and flowers. It can cause leaves to curl, wilt and become thin. To manage powdery mildew, it is essential to maintain proper air circulation and humidity levels around the plant. Additionally, applying fungicides and removing infected plant parts can help control the spread of the disease.
Common Pests
Oxytropis glabrata is relatively pest-resistant and does not attract many insect pests. However, it can still be affected by certain insects such as aphids and spider mites. Aphids are tiny, soft-bodied insects that suck sap from plant tissues, causing leaves to curl and wilt. To manage aphids, it is essential to spray the plant with insecticidal soap or neem oil. Additionally, removing infected plant parts can also help control the spread of the insects.
Spider mites are small, reddish-brown arachnids that feed on plant sap, causing leaves to turn yellow and fall off. To manage spider mites, it is essential to spray the plant with a strong stream of water to wash the mites away. Additionally, applying insecticidal soap or neem oil can help control the spread of the insects.
In conclusion, managing diseases and pest infestations is essential for maintaining the health and longevity of Oxytropis glabrata. By monitoring the plant's growth and health, maintaining proper soil moisture and air circulation, and addressing potential threats promptly, the smooth oxytrope can thrive and continue to add beauty to any landscape.
