Contents
Description
Bidens Subalternans, commonly known as Spanish needles or butterfly needles, is an annual herbaceous plant that belongs to the Asteraceae family. This plant is native to Central and South America and is widely distributed in North America, Asia, and Africa. Bidens Subalternans is a self-seeding plant that can grow up to 2 meters in height and has a lifespan of about one year. The leaves and stems of this plant are covered with small hairs that make them appear rough to the touch. The flowers of Bidens Subalternans are small and yellow in color, with a diameter of around 1 cm. The plant produces small, needle-like seeds that stick to clothing and animals, giving rise to the common name “Spanish needles.”
Taxonomic Information
| Domain | Eukarya |
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Bidens |
Appearance
The Bidens Subalternans plant has a distinct appearance due to its rough and hairy leaves and stems. The leaves are simple, alternate, and usually have three to five lobes. The plant produces small yellow flowers that have an average diameter of around 1 cm. The flowers are arranged in clusters on the stem and have a yellow center surrounded by several yellow petals. Bidens Subalternans produces small black seeds that are needle-like and stick to clothing and animals, making them difficult to remove.
Care Guide
Bidens Subalternans is a hardy plant that requires minimal care to thrive. This plant prefers well-draining soil and moderate watering. Overwatering can cause root rot and other diseases. Bidens Subalternans prefers a sunny location and can tolerate a wide range of temperatures. It can grow in hardiness zones 3-9. Fertilizing the plant once or twice a month with a balanced fertilizer can promote growth and flowering. Deadheading the plant regularly can also promote more blooms.
Common Pests & Diseases
Although Bidens Subalternans is a hardy plant, it is susceptible to a few pests and diseases. The most common pests that affect this plant are aphids, spider mites, and whiteflies. These pests can be controlled using insecticidal soap or neem oil. The plant is also susceptible to fungal diseases such as powdery mildew and root rot. These diseases can be prevented by ensuring that the plant has good air circulation and that the soil is well-draining.
Habitat
Bidens Subalternans is native to Central and South America but has been introduced to other parts of the world. This plant can grow in a wide range of habitats, including open fields, roadsides, and disturbed areas. It prefers sunny locations and well-draining soil. Bidens Subalternans can grow in hardiness zones 3-9 and is drought-tolerant.
Question and Answer
Q: Is Bidens Subalternans an invasive plant?
A: Bidens Subalternans is not considered an invasive plant, but it can spread quickly in certain situations.
Q: Can Bidens Subalternans be grown in containers?
A: Yes, Bidens Subalternans can be grown in containers. Just make sure the soil is well-draining and the plant is exposed to sunlight.
Q: How often should I water Bidens Subalternans?
A: Bidens Subalternans prefers moderate watering. Water the plant when the top inch of soil is dry.
Q: How tall can Bidens Subalternans grow?
A: Bidens Subalternans can grow up to 2 meters in height.
Related Plants
- Bidens Aristosa
- Bidens Bicolor
- Bidens Biternata
- Bidens Tripartita
References
- https://plants.usda.gov/core/profile?symbol=BISU4
- https://www.fs.fed.us/database/feis/plants/forb/bidsub/all.html
- https://www.wildflower.org/plants/result.php?id_plant=BISU4
- https://www.gardeningknowhow.com/ornamental/flowers/spanish-needles/spanish-needles-information.htm
