Contents
Description
Helianthus Pauciflorus, also known as the stiff sunflower or stiff-leaved sunflower, is a species of sunflower native to North America. It belongs to the Asteraceae family and is known for its tall height and yellow flowers.
Taxonomic Information
| Domain | Eukaryota |
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Helianthus |
Appearance
Helianthus Pauciflorus can grow up to 2 meters in height and has a single stem with narrow leaves. The leaves are alternate, lanceolate, and rough to the touch. The flowers are yellow and have both ray and disk florets. The ray florets are usually 8-15 and the disk florets are numerous. The fruit is an achene with a pappus of scales.
Care Guide
Helianthus Pauciflorus requires regular watering, especially during hot and dry weather. It prefers well-draining soil and full sun exposure. Fertilize the plant with a balanced fertilizer in the spring and summer. It is hardy in USDA zones 3-9.
Common Pests & Diseases
Helianthus Pauciflorus is susceptible to aphids, spider mites, and leaf miners. It can also be affected by fungal diseases such as powdery mildew and rust.
Habitat
Helianthus Pauciflorus is found in open woods, prairies, and along roadsides in North America. It prefers well-drained soil and full sun exposure.
Question and Answer
Q: What is the common name for Helianthus Pauciflorus?
A: The common name is stiff sunflower or stiff-leaved sunflower.
Q: What family does Helianthus Pauciflorus belong to?
A: It belongs to the Asteraceae family.
Q: What is the height of Helianthus Pauciflorus?
A: It can grow up to 2 meters in height.
Q: What is the hardiness zone for Helianthus Pauciflorus?
A: It is hardy in USDA zones 3-9.
Related Plants
- Helianthus annuus
- Helianthus decapetalus
- Helianthus divaricatus
- Helianthus maximiliani
References
- “Helianthus pauciflorus.” Missouri Botanical Garden, www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=b945.
- “Stiff Sunflower.” USDA Forest Service, www.fs.fed.us/wildflowers/plant-of-the-week/helianthus_pauciflorus.shtml.
- “Helianthus pauciflorus.” Illinois Wildflowers, www.illinoiswildflowers.info/prairie/plantx/st_sunflowerx.htm.
