Doellingeria infirma
| Doellingeria infirma | |
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| Species: | D. infirma
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| Binomial name | |
| Doellingeria infirma | |
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Doellingeria infirma (known by the common names cornel-leaf whitetop or cornel-leaved aster) is a perennial forb native to the eastern United States,[2] that produces white composite flowers in late summer.
Description
Doellingeria infirma has a smooth slender 45 to 90 centimeters (18-36 inches) tall stem which is rough and sparingly branched at the summit. It has no basal leaves. The lower leaves are small and obovate. Higher on the stem the leaves become larger, 5 to 12 centimeters (2-5 inches) long and 2.5 to 4 centimeters (1-3 inches) wide. They are oblong-lanceolate, entire, smooth above and sparingly hispid on the veins beneath. There are usually between 3 and 33 flower heads, each consisting of 4-20 disc florets and 3-11 ray florets. The flower heads are arranged in a terminal flat topped cluster. The fruit are cypselae each with a pappus of tawny bristles.[3][4]
Distribution and habitat
Doellingeria infirma is widely distributed in the eastern United States, although local distribution may be spotty. Its range stretches from Alabama and the Florida Panhandle north as far as Massachusetts, Ohio and New York State.[5] In Virginia, it grows in habitats such as mesic to dry woodlands and clearings.[6] The presence of this species is dependent on appropriate habitat, and it may be eliminated from an area by development, changes in land use, or competition with invasive species.
Conservation status in the United States
Doellingeria infirma is listed as endangered in Massachusetts, and as "historical" in Rhode Island.[7] It is listed as species of special concern and believed extirpated in Connecticut.[8]
References
- ^ "Doellingeria infirma (Michx.) Greene - The Plant List". Retrieved January 25, 2014. The Plant List (2013). Version 1.1. Published on the Internet; http://www.theplantlist.org/
- ^ "Plants Profile for Doellingeria infirma (cornel-leaf whitetop)". Retrieved January 25, 2014. USDA, NRCS. 2014. The PLANTS Database (http://plants.usda.gov)[permanent dead link]. National Plant Data Team, Greensboro, NC 27401-4901 USA.
- ^ Britton, Nathaniel Lord & Brown, Addison (1913). An Illustrated Flora of the Northern United States, Canada and the British Possessions: From Newfoundland to the Parallel of the Southern Boundary of Virginia, and from the Atlantic Ocean Westward to the 102d Meridian, Volume 3., p. 443-444. Charles Scribner's Sons, New York.
- ^ "Doellingeria infirma in Flora of North America @ efloras.org". Retrieved January 30, 2014. 'eFloras (2008). Published on the Internet (http://www.efloras.org)[permanent dead link]. Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
- ^ Biota of North America Program 2014 county distribution map
- ^ "Digital Atlas of the Virginia Flora | Doellingeria infirma (Michx.) Greene". Retrieved January 30, 2014. Virginia Botanical Associates. (2014). Digital Atlas of the Virginia Flora (http://www.vaplantatlas.org)[permanent dead link]. c/o Virginia Botanical Associates, Blacksburg.
- ^ "Plants Profile for Doellingeria infirma (cornel-leaf whitetop)". plants.usda.gov. Retrieved 1 January 2018.
- ^ "Connecticut's Endangered, Threatened and Special Concern Species 2015". State of Connecticut Department of Energy and Environmental Protection Bureau of Natural Resources. Retrieved 1 January 2018. (Note: This list is newer and updated from the one used by plants.usda.gov)
