Plantae > Tracheophyta > Magnoliopsida > Asterales > Asteraceae > Rudbeckia > Rudbeckia hirta

Rudbeckia hirta (Black-eyed Susan)

Synonyms:

Wikipedia Abstract

Rudbeckia hirta, commonly called black-eyed-Susan, is a North American species of flowering plants in the sunflower family, native to the Eastern and Central North America and naturalized in the Western part of the continent as well as in China. It has now been found in all 10 Canadian Provinces and all 48 of the states in the contiguous United States. Rudbeckia hirta is the state flower of Maryland. Parts of the plant have nutritional value. Other parts are not edible.
View Wikipedia Record: Rudbeckia hirta

Infraspecies

Rudbeckia hirta f. multiligula
Rudbeckia hirta var. angustifolia (blackeyed Susan)
Rudbeckia hirta var. floridana (blackeyed Susan)
Rudbeckia hirta var. gigantea
Rudbeckia hirta var. hirta (blackeyed Susan)
Rudbeckia hirta var. pulcherrima (blackeyed Susan) (Attributes)

Attributes

Allergen Potential [1]  Medium
Screening - Summer [2]  Porous
Screening - Winter [2]  Porous
Bloom Period [2]  Summer
Drought Tolerance [2]  Medium
Fire Tolerance [2]  Medium
Flower Type [3]  Hermaphrodite
Frost Free Days [2]  5 months
Fruit/Seed Abundance [2]  High
Fruit/Seed Begin [2]  Summer
Fruit/Seed End [2]  Summer
Growth Form [2]  Single Stem
Growth Period [2]  Spring, Fall, Winter
Growth Rate [2]  Rapid
Hazards [3]  This plant is reputed to be poisonous to cattle, sheep and pigs;
Leaf Type [2]  Deciduous
Lifespan [3]  Biennial/Perennial
Pollinators [3]  Bees, Hoverflies
Propagation [2]  Seed
Root Depth [2]  10 inches (25 cm)
Seed Spread Rate [2]  Moderate
Seed Vigor [2]  Medium
Seeds Per [2]  1575757 / lb (3473952 / kg)
Shape/Orientation [2]  Semi-Erect
Structure [5]  Herb
Usage [3]  A yellow dye is obtained from the flowers;
Vegetative Spread Rate [2]  None
Flower Color [2]  Orange
Foliage Color [2]  Green
Fruit Color [2]  Brown
Flower Conspicuous [2]  Yes
Height [3]  6.56 feet (2 m)
Width [3]  20 inches (0.5 m)
Hardiness Zone Minimum [2]  USDA Zone: 4 Low Temperature: -30 F° (-34.4 C°) → -20 F° (-28.9 C°)
Light Preference [4]  Mostly Sunny
Soil Acidity [4]  Neutral
Soil Fertility [4]  Intermediate
Soil Moisture [4]  Mostly Dry
Water Use [2]  Moderate
View Plants For A Future Record : Rudbeckia hirta

Protected Areas

Ecosystems

Emblem of

Maryland

Predators

Providers

Consumers

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
♦ 3Plants For A Future licensed under a Creative Commons Attribution 4.0 License
♦ 4Ellenberg, H., Weber, H.E., Dull, R., Wirth, V., Werner, W., Paulissen, D. (1991) Zeigerwerte von Pflanzen in Mitteleuropa. Scripta Geobotanica 18, 1–248
♦ 5Kattge, J. et al. (2011b) TRY - a global database of plant traits Global Change Biology 17:2905-2935
♦ 6Study of Northern Virginia Ecology
♦ 7Butterflies of Canada, Canadian Biodiversity Information Facility
♦ 8Biological Records Centre Database of Insects and their Food Plants
♦ 9Robertson, C. Flowers and insects lists of visitors of four hundred and fifty three flowers. 1929. The Science Press Printing Company Lancaster, PA.
♦ 10Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
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