Rudbeckia laciniata, commonly called cutleaf coneflower, is a species of flowering plant in the aster family (Asteraceae). It is native to North America, where it is widespread in both Canada and the United States. Its natural habitat is wet sites in flood plains, along stream banks, and in moist forests.
It is a robust herbaceous perennial growing up to 3 m (10 ft) tall. It has broadly ovate and somewhat glaucous leaves that are often deeply dissected. The composite flowers are produced in late summer and autumn. The disc flowers are green to yellowish green, while the rays are pale yellow.
Up to six varieties of Rudbeckia laciniata are currently recognized. The varieties ampla and heterophylla are considered to be the most distinctive, while the others less so. There is variation in treatment among authors, with the less distinctive varieties sometimes being subsumed into laciniata, and variety ampla sometimes recognized at the species level.
The six varieties are:
- R. laciniata var. ampla - Native west of the Great Plains, into to the Rocky Mountains.
- R. laciniata var. bipinnata - Native to New England and the Mid-Atlantic area.
- R. laciniata var. digitata - Native to the Southeastern Coastal Plain.
- R. laciniata var. heterophylla - Endemic to Levy County, Florida.
- R. laciniata var. humilis - Native to the southern Appalachian Mountains.
- R. laciniata var. laciniata - Widespread and common, native across eastern North America.
Common names other than cutleaf coneflower include "cutleaf", "goldenglow", "green-headed coneflower", "tall coneflower", "sochan" and "thimbleweed".
Rudbeckia laciniata is widely cultivated in gardens and for cut flowers. Numerous cultivars have been developed, of which 'Herbstsonne' ("Autumn sun") has gained the Royal Horticultural Society's Award of Garden Merit. However, the Lady Bird Johnson Wildflower Center notes that " Because it spreads rampantly by underground stems, cut-leaf coneflower is only appropriate for large sites."
Traditionally, the young leaves have been gathered from the wild and eaten in the early spring. They are greatly favored as a potherb (cooked). Though some references state the use of this plant as salad greens (raw), traditional use is as cooked greens. This is assumed to be done to remove toxins. However, there is little evidence of their presence. One report cites circumstantial evidence of poisoning to horses, sheep and pigs.
- "Rudbeckia laciniata". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 4 February 2018.
- "Rudbeckia laciniata". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2013. Retrieved 4 February 2018.
- Rudbeckia laciniata Flora of North America
- RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 1405332964.
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- Yatskievych, George (2006). Flora of Missouri, Volume 2. Missouri Botanical Garden Press. p. 544.
- Alan Weakley (2015). "Flora of the Southern and Mid-Atlantic States".
- "RHS Plant Selector - Rudbeckia laciniata 'Herbstsonne'". Retrieved 2 June 2013.
- Rudbeckia laciniata http://www.wildflower.org/plants/result.php?id_plant=RULA3
- Banks, William. 2004. Plants of the Cherokee. Great Smoky Mts. Assn.: Gatlinburg, Tennessee.
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- Kingsbury, J.M. (1964). Poisonous Plants of the United States and Canada. Englewood Cliffs, New Jersey: Prentice-Hall Inc.
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