Description
Platanthera unalascensis, also known as the Alaska Rein Orchid or Bog Candle, is a flowering perennial plant belonging to the Orchidaceae family. It has a unique appearance due to its bright white-colored flowers and plump stem with one or two elongated leaves.
Origin
Endemic to Alaska and found mainly along the coastlines and floodplains. It grows in wet meadows, bogs, and open coniferous or mixed deciduous forests. It is commonly found in the Aleutian Islands, throughout the Alaska Peninsula, and the Kenai Peninsula.
Common Names
The plant's common names are Alaska Rein Orchid and Bog Candle. It's also commonly referred to as the western rein orchid, white bog-orchid, and green rein-orchid.
Uses
The Alaska Rein Orchid is not used extensively for any commercial or medicinal purposes. However, it is valued as an ornamental plant for its unique and striking appearance. The plant is also commonly observed by ecologists and studied for its ecological significance. It acts as a vital component in some food chains and plays a crucial role in maintaining biodiversity in its natural ecosystem.
Light Requirements
Platanthera unalascensis ssp. maritima generally prefers partial to full shade. This species can tolerate a moderate amount of sunlight but requires protection from direct, intense sunlight.
Soil Requirements
The preferred soil type for this species is moist to wet, nutrient-rich soil that is well-drained. Platanthera unalascensis ssp. maritima can tolerate slightly acidic soil with a pH of 5.5 to 7.5.
Temperature Requirements
This species typically grows in cool, moist environments such as bogs, fens, or other wetlands. They can tolerate a wide range of temperatures but grow best in cool, damp environments with temperatures ranging from 45°F to 60°F (7°C to 15.5°C).
Cultivation and Care for Platanthera unalascensis (Spreng.) Kurtz ssp. maritima (Greene) de Filipps
Platanthera unalascensis (Spreng.) Kurtz ssp. maritima (Greene) de Filipps, commonly known as the Aleutian bog orchid, is a beautiful and delicate plant that is native to the western coast of North America. If you want to cultivate this orchid in your garden, you need to take extra care, as it has specific requirements.
Soil
The first consideration for this orchid is the soil. Make sure the soil is moist and acidic, with a pH level between 5.5 and 6.5, as this will ensure the orchid gets the nutrients it needs for healthy growth. Avoid soils that have high levels of sodium or chloride, as this can harm the plant.
Light
The ideal location for the Aleutian bog orchid is in partial shade, as it prefers cool temperatures and high humidity. However, it also needs some direct sunlight to thrive, especially during the morning and evening hours. Avoid exposing the orchid to direct sunlight during the hottest hours of the day, as this can damage the plant.
Watering
The watering needs for the Aleutian bog orchid are specific. It needs to be watered regularly, as it grows in boggy, wet conditions, but it also needs well-draining soil to prevent the roots from rotting. You should water the plant twice a week, or more frequently in hot weather, but make sure the soil dries slightly between waterings. Avoid overwatering, as this can lead to fungal diseases.
Fertilization
Fertilization of the Aleutian bog orchid should be done with care. Use a slow-release, low-nitrogen fertilizer once a month during the growing season, and avoid fertilizing during the dormant phase. Use a fertilizer specifically designed for orchids to ensure the plant gets the nutrients it needs without causing damage from an overdose.
Pruning
As with all orchids, pruning should be done with care to avoid damaging the plant. Remove any dead or damaged leaves, but avoid cutting away too much of the plant. Once the flowers have faded, you can trim back the stem to just above the highest leaf node to encourage new growth for next season.
By following these cultivation and care tips, you can help your Platanthera unalascensis (Spreng.) Kurtz ssp. maritima (Greene) de Filipps thrive and enjoy its beautiful blooms for years to come.
Propagation of Platanthera unalascensis (Spreng.) Kurtz ssp. maritima (Greene) de Filipps
Platanthera unalascensis (Spreng.) Kurtz ssp. maritima (Greene) de Filipps, commonly known as the salt marsh orchid or Alaskan bog orchid, is a terrestrial orchid species that is endemic to coastal regions of Alaska and British Columbia. Propagating this species can be achieved through several methods, including division and seed germination.
Division
Division is a common propagating method for Platanthera unalascensis subspecies. The best time to divide the plants is in the fall when they are not in bloom. Dig up the plants, and separate the rhizomes with a clean and sharp knife. Each section should have at least one pseudobulb. Plant the divided sections in well-draining soil and water them adequately.
Seed Germination
Seed germination is another way to propagate Platanthera unalascensis subspecies. The plants produce capsule-like fruits that ripen and release seeds during late summer. Collect the seeds from the capsules, and sow them in a seed-starting mix during the fall or early spring. It is recommended to use bottom heat to aid germination. Seedlings may take up to two years to reach maturity and produce their first blooms.
Disease Management
Platanthera unalascensis (Spreng.) Kurtz ssp. maritima (Greene) de Filipps, commonly known as Alaska bog orchid, can suffer from various diseases. Some of the common diseases that can affect this plant are listed below:
- Fungal Leaf Spots: Fungal organisms such as Cercospora and Alternaria can cause leaf spots on the plant. Regular inspection of leaves and removing the infected ones can prevent the spread of the disease. Use of fungicide sprays can also be useful.
- Root Rot: Prolonged moisture and poor drainage can lead to root rot in the plant. Adequate drainage and proper watering can help prevent this disease.
- Powdery Mildew: Powdery mildew is caused by fungal organisms and can be controlled by improving air circulation and avoiding overwatering of the plant. In some cases, a chemical fungicide may be needed.
Pest Management
Alaska bog orchid can also attract some pests. Below are some common pests that can affect the plant and ways to manage them:
- Spider Mites: Spider mites are tiny pests that can cause damage by sucking plant sap. They can be managed through the use of natural predators such as ladybugs and lacewings or chemical miticide sprays.
- Slugs and Snails: These pests can damage the plant by feeding on the leaves. Surrounding the plant with copper stripping or diatomaceous earth can help prevent slug and snail damage.
- Aphids: Aphids are common pests that can be controlled by spraying the plant with soapy water or using strong water jets to knock them off the plant.
