Flower with pink rays Kimberly J. Smith

Flower with pink rays
Kimberly J. Smith

Class
Dicotyledoneae (Dicots)
Family
Asteraceae (Aster Family)
State Protection
Rare
Federal Protection
Not Listed
State Conservation Status Rank
S3
Global Conservation Status Rank
G3

Summary

Did you know?

Of the five known species of Coreopsis in New York, this is both our only native species and the only one with pink flowers.

State Ranking Justification

There are 23 existing populations, some of them consisting of multiple hydrologically connected pondshores. There are four additional populations known from the early 1900s which have not been resurveyed.

Short-term Trends

The trend of most populations seem stable but populations can fluctuate dramatically depending upon water levels. A few populations have been negatively affected by Phragmites.

Long-term Trends

Almost all of the known historical populations remain extant so long-term trends remain rather stable. Future trends may be downward if populations of Phragmites are not controlled at occupied sites.

Conservation and Management

Threats

Some ponds have highly developed shorelines that threaten populations with direct disturbance by trampling and ATV use. The invasion of Phragmites is also a threat to a few populations.

Conservation Strategies and Management Practices

The pondshores need to be protected from direct disturbance by ATVs and excessive trampling. Exotic invasive species must be prevented from colonizing the shores and present populations must be eliminated. A natural buffer of at least 200 feet should be established around the ponds to prevent excessive runoff and pollution events.

Research Needs

Research is needed into management techniques that could augment populations that have been reduced by Phragmites.

Habitat

Habitat

Most of New York's populations of Rose Coreopsis have been found growing in or along the shores of Coastal Plain ponds or pools in Pitch Pine Barrens, in open habitats with sandy or peaty substrates (New York Natural Heritage Program 2010). Sandy shores, marsh edges (FNA 2006). Damp sandy, gravelly or peaty shores and depressions (Fernald 1970). Wet, often sandy or acid soil, or in shallow water (Gleason 1952).

Associated Ecological Communities

  • Coastal plain pond (guide)
  • Coastal plain pond shore (guide)
  • Gravel mine*
  • Pine barrens vernal pond* (guide)

Associated Species

  • Agalinis purpurea (purple agalinis)
  • Agrostis scabra (northern tickle grass)
  • Bidens cernua (nodding beggar-ticks)
  • Bidens tripartita
  • Cephalanthus occidentalis (buttonbush)
  • Cladium mariscoides (twig-rush)
  • Clethra alnifolia (coastal sweet-pepperbush)
  • Cyperus dentatus (toothed flat sedge)
  • Decodon verticillatus (water-willow)
  • Drosera filiformis (thread-leaved sundew)
  • Eleocharis equisetoides (horsetail spike-rush)
  • Eleocharis flavescens
  • Eleocharis melanocarpa (black-fruited spike-rush)
  • Eleocharis ovata (ovate spike-rush)
  • Eleocharis robbinsii (Robbins's spike-rush)
  • Eleocharis tuberculosa (large-tubercled spike-rush)
  • Eriocaulon aquaticum (northern pipewort, northern hat-pins)
  • Eupatorium perfoliatum (boneset)
  • Euthamia graminifolia (common flat-topped-goldenrod)
  • Fimbristylis autumnalis (autumn fimbry)
  • Fuirena pumila (dwarf umbrella-grass)
  • Glyceria canadensis (rattlesnake manna grass)
  • Gratiola aurea (golden hedge-hyssop)
  • Hypericum adpressum (creeping St. John's-wort)
  • Hypericum canadense (lesser Canadian St. John's-wort)
  • Hypericum mutilum
  • Juncus canadensis (Canada rush)
  • Juncus effusus
  • Juncus militaris (bayonet rush)
  • Juncus pelocarpus (brown-fruited rush)
  • Leucothoe racemosa
  • Linum striatum (rigid yellow flax)
  • Lobelia nuttallii (Nuttall's lobelia)
  • Ludwigia alternifolia (alternate-leaved seed-box)
  • Ludwigia palustris (water-purslane)
  • Lycopus amplectens (clasping bugleweed, clasping water-horehound)
  • Nymphaea odorata
  • Panicum verrucosum
  • Phragmites australis (old world reed grass, old world phragmites)
  • Polygala cruciata (cross-leaved milkwort)
  • Proserpinaca pectinata (comb-leaved mermaid-weed)
  • Rhexia virginica (Virginia meadow-beauty)
  • Rhynchospora capillacea (hair beak sedge)
  • Rhynchospora capitellata (brownish beak sedge)
  • Rhynchospora macrostachya (tall horned beak sedge)
  • Rhynchospora nitens (short-beaked beak sedge)
  • Rhynchospora scirpoides (long-beaked beak sedge)
  • Schoenoplectus smithii var. setosus
  • Schoenoplectus tabernaemontani (soft-stemmed bulrush)
  • Scirpus cyperinus (common wool-grass)
  • Scleria muehlenbergii (Muhlenberg's nut sedge)
  • Sphagnum
  • Symphyotrichum dumosum (bushy-aster)
  • Thelypteris palustris
  • Utricularia purpurea (purple bladderwort)
  • Vaccinium corymbosum (highbush blueberry)
  • Viola lanceolata (lance-leaved violet)
  • Xyris difformis
  • Xyris smalliana (Small's yellow-eyed-grass, large yellow-eyed-grass)

Range

New York State Distribution

This species is currently known only from Suffolk County, Long Island, and is considered extirpated from Nassau County.

Global Distribution

The small wildflower is concentrated along the coastal plain from Nova Scotia and Massachusetts through Long Island, New Jersey, and the Delmarva Peninsula. There are a few scattered inland populations in Pennsylvania, South Carolina and Georgia

Best Places to See

  • Robert Cushman Murphy County Park (Suffolk County)

Identification Comments

General Description

Rose coreopsis is a perennial rhizomatous herb. It grows 10 to 30 cm high. The leaves are opposite, lance-shaped or linear, about 2 to 4.5 cm long and 1 to 2 mm wide. As with most members of the aster family, what at first glance appear to be flowers are in fact many-flowered heads, with petal-like ray flowers surrounding a center of disc flowers. Rose coreopsis has pink to pinkish or white ray flowers 9 to 15 mm long, and yellow disc flowers, all emerging from a single receptacle on short peduncles. The fruit are narrow achenes (FNA 2006).

Best Life Stage for Proper Identification

The best time to identify Rose Coreopsis is when it is in flower.

Similar Species

Rose Coreopsis is the only Coreopsis species in New York with pink, sometimes white, ray flowers. The combination of heads with separate pink ray and yellow disc flowers, chaffy receptacle, opposite leaves, and flattened, beakless achenes distinguish it from other New York aster genera as well (Gleason and Cronquist 1991).

Best Time to See

Rose Coreopsis flowers from July through September, and the fruits persist through November.

  • Vegetative
  • Flowering
  • Fruiting

The time of year you would expect to find Rose Coreopsis vegetative, flowering, and fruiting in New York.

Rose Coreopsis Images

Taxonomy

Rose Coreopsis
Coreopsis rosea Nutt.

  • Kingdom Plantae
    • Phylum Anthophyta
      • Class Dicotyledoneae (Dicots)
        • Order Asterales
          • Family Asteraceae (Aster Family)

Additional Resources

Best Identification Reference

Flora of North America Editorial Committee. 2006. Flora of North America North of Mexico. Vol. 21. Magnoliophyta: Asteridae, Part 8: Asteraceae, part 3. Oxford Univ. Press, New York. xxii + 616 pp.

Other References

Fernald, M. L. 1950. Gray's manual of botany. 8th edition. Corrected printing (1970). D. Van Nostrand Company, New York. 1632 pp.

Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden, Bronx, New York. 910 pp.

Holmgren, Noel. 1998. The Illustrated Companion to Gleason and Cronquist's Manual. Illustrations of the Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden, Bronx, New York.

New York Natural Heritage Program. 2010. Biotics database. New York Natural Heritage Program. New York State Department of Environmental Conservation. Albany, NY.

New York Natural Heritage Program. 2019. New York Natural Heritage Program Databases. Albany, NY.

Weldy, T. and D. Werier. 2010. New York flora atlas. [S.M. Landry, K.N. Campbell, and L.D. Mabe (original application development), Florida Center for Community Design and Research http://www.fccdr.usf.edu/. University of South Florida http://www.usf.edu/]. New York Flora Association http://newyork.plantatlas.usf.edu/, Albany, New York

Links

About This Guide

This guide was authored by: Stephen M. Young

Information for this guide was last updated on: September 6, 2012

Please cite this page as:
New York Natural Heritage Program. 2019. Online Conservation Guide for Coreopsis rosea. Available from: https://guides.nynhp.org/rose-coreopsis/. Accessed March 20, 2019.

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