Plantae > Tracheophyta > Magnoliopsida > Asterales > Asteraceae > Helianthus > Helianthus angustifolius

Helianthus angustifolius (swamp sunflower)

Synonyms:

Wikipedia Abstract

Helianthus angustifolius is a species of sunflower known by the common name narrowleaf sunflower or swamp sunflower. It is native to the south-central and eastern United States, found in all the coastal states from Texas to Long Island, and inland as far as Missouri. It is typically found in the coastal plain habitat (both the Atlantic and Gulf), particularly in wet areas.
View Wikipedia Record: Helianthus angustifolius

Attributes

Allergen Potential [1]  Medium
Screening - Summer [2]  Moderate
Screening - Winter [2]  Porous
Bloom Period [2]  Late Summer
Drought Tolerance [2]  Medium
Fire Tolerance [2]  Medium
Frost Free Days [2]  5 months 10 days
Fruit/Seed Abundance [2]  Medium
Fruit/Seed Begin [2]  Summer
Fruit/Seed End [2]  Fall
Growth Form [2]  Rhizomatous
Growth Period [2]  Spring, Summer
Growth Rate [2]  Moderate
Leaf Type [2]  Deciduous
Lifespan [2]  Perennial
Propagation [2]  Seed, Sprig
Regrowth Rate [2]  Slow
Root Depth [2]  6 inches (15 cm)
Seed Spread Rate [2]  Moderate
Seed Vigor [2]  Medium
Seeds Per [2]  503999 / lb (1111128 / kg)
Shape/Orientation [2]  Erect
Structure [3]  Herb
Vegetative Spread Rate [2]  Moderate
Flower Color [2]  Yellow
Foliage Color [2]  Dark Green
Fruit Color [2]  Brown
Fall Conspicuous [2]  Yes
Flower Conspicuous [2]  Yes
Height [2]  5.576 feet (1.7 m)
Hardiness Zone Minimum [2]  USDA Zone: 4 Low Temperature: -30 F° (-34.4 C°) → -20 F° (-28.9 C°)
Light Preference [2]  Mixed Sun/Shade
Soil Acidity [2]  Mostly Acid
Soil Fertility [2]  Infertile
Water Use [2]  Moderate

Protected Areas

External References

USDA Plant Profile

NatureServe Explorer

Citations

Attributes / relations provided by
♦ 1Derived from Allergy-Free Gardening OPALS™, Thomas Leo Ogren (2000)
♦ 2USDA Plants Database, U. S. Department of Agriculture
♦ 3Kattge, J. et al. (2011b) TRY - a global database of plant traits Global Change Biology 17:2905-2935
Abstract provided by DBpedia licensed under a Creative Commons License
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0