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The Maryland Native Plant Society

The Maryland Native Plant Society

News and Action

  • 05/29/2019 10:31 AM | Anonymous member (Administrator)

    A bipartisan bill in the US Senate would provide $100 million for research, diagnosis and treatment of Lyme and other tick-borne diseases. More information here. Please contact your US senators and tell them you support the TICK Act.

  • 04/02/2019 3:09 PM | Anonymous member (Administrator)

    MNPS Conference: "Ancient Forests and Peatlands of Western Maryland" August 24-25, Frostburg State University.

    Frostburg is one of our most popular conference locations, and the late summer date should find plenty of flowers still in bloom.

    Register Today

  • 05/04/2018 1:46 PM | Anonymous member (Administrator)

    We can help DNR track "watchlist" species - ranked S3. Here are some that bloom in the spring and are easy to ID: Cypripedium parviflorum (Yellow Lady's-slipper), Delphinium tricorne (Dwarf Larkspur), Hybanthus concolor (Green Violet), Kalmia angustifolia (Sheep Laurel), Myosotis verna (Spring Forget-me-not), Primula media (Eastern Shooting star).

    If you see any of these - or any other S3 plant - please note the exact location and try to take a photo. Then either contribute the record to the Maryland Biodiversity Project,, or send an email to We'll take it from there. Locations of species likely to be poached will not be shared publicly.

    Click here to find a list of Maryland's Rare, Threatened and Endangered Plants. 

  • 02/13/2018 11:41 AM | Anonymous member (Administrator)
    Montgomery County’s rural and low-density areas are under threat. Those areas are currently served by septic systems, which preclude high-density development. Recently, the county’s Department of Environmental Protection (DEP) and Department of Permitting Services have been conducting flawed “septic surveys” that certain interest groups are using to promote conversion from septic systems to sewer service. Conversion to sewer systems leads to high-density development, increased storm water runoff, degradation of plant and animal habitats, and the very real potential for sewer spills. Sewer extensions into low density and rural areas is not smart growth.

    MNPS recently co-signed a letter prepared by the Montgomery Coalition to Stop Sewer Sprawl (affiliated with the Montgomery County Stormwater Partners Network) to Montgomery County Executive Ike Leggett asking him to take immediate action to protect our clean water by preventing sewer sprawl.

    YOU CAN HELP by sending an email to the County Executive requesting a pause in the septic surveys, to permit input from the public and the County Council. See sample below. For more information, see the letter linked above, or contact Ken Bawer:

    Subject: Pause DEP “Septic Surveys”

    Dear County Executive Leggett:

    I am asking for a common sense pause in DEP septic surveys, including the North Potomac Highlands septic survey, until such time that the public and Council can vet the survey process and have the opportunity to provide feedback. Extending sewer pipes into low-density areas will threaten our clean streams and our natural areas.  

    Please do not allow DEP’s flawed “septic surveys” to sprawl sewer lines into our long protected low-density and rural areas.

    Yours truly,
  • 05/26/2017 10:17 AM | Anonymous member

    You can read all 349 pages (

    Make you own comments or submit something like the following in your own words to Planning Board Chair Anderson at

    "MNPS leads dozens of field trips every year in Montgomery County’s “Best Natural Areas” and other natural areas in the parks. Our members participate in these field trips to identify and enjoy the diversity of native plants. That diversity has significantly declined in recent years as natural areas are damaged by non-native invasive plants overrunning many areas, uncontrolled stormwater destroying steam valley habitats, and deer wiping out understory plants and causing unnatural alteration of native plant communities. MNPS advocates increased stewardship of existing natural areas and the acquisition of additional natural areas before they are lost to development."

  • 10/31/2016 3:26 PM | Anonymous member (Administrator)

    The Norton Brown Herbarium at the University of Maryland is in danger of being shut down. It holds the largest collection of Maryland specimens in existence and continues to collect, documenting the changes in distribution of our flora. Read the letter from MNPS to University officials here. And please write your own letter. Maryland needs this critical scientific resource.

  • 01/04/2016 10:33 AM | Anonymous member (Administrator)

    RE: Serpentine Barrens Conservation Park - Land Acquisition Recommendation - LOS - November 19, 2015

    Dear Commissioner Anderson and members of the Planning Commission,

       The Maryland Native Plant Society strongly urges the Planning Commission to not consider adding multi-use trails into the globally rare, old-age Serpentine Barrens Conservation Park (Travilah Serpentine Barrens; Hunting Hill Serpentine Barrens) in Montgomery County, Maryland, as well as similar highly sensitive natural areas.  Moreover, we feel that proposals for such are not in accordance with Best Management Practices and sustainable planning principles for quality natural area sites.  The preservation and future sustainability of natural area sites and the overarching principle of “Do No Harm” should guide all efforts in this regard.

       The Travilah Serpentine Barrens (Serpentine Barrens Conservation Park) is the mid-Atlantic region's stellar example of a globally-rare, forested serpentinite community.  This vegetation type once comprised many thousands of acres in the area of Montgomery County west of Potomac and Rockville, with about 1,000 acres of this rare local landscape preserved today.  Serpentinite is an ultramafic rock derived from magnesium-rich silicate materials that typically weathers to a soil that is high in magnesium and iron. 

       As you know, the Travilah Serpentine Barrens hosts numerous R,T,&E species, almost all of which are scattered throughout the woodlands.  Additionally, a mosaic of several state and globally rare natural community types comprise much of the site, including:

    Piedmont Ultramafic Woodland:Pinus virginiana - Quercus stellata - Quercus marilandica / Schizachyrium scoparium Woodland [Provisional] (USNVC: no equivalent).  Global/State Ranks: -/SU

    (This type is certainly globally rare, but stemming from its rarity worldwide, more studies are needed to better define its classification.)  

    Eastern Red-cedar - Virginia Pine / Roundleaf Greenbrier Serpentine Forest: Juniperus virginiana - Pinus virginiana / Smilax rotundifolia Serpentine Forest (USNVC: CEGL006440). Global/State Ranks: G1G2, SNR.

    Piedmont Acidic Oak - Hickory Forest: Quercus alba - Quercus rubra - Carya tomentosa / Cornus florida / Vaccinium stamineum / Hylodesmum nudiflorum Forest (USNVC: CEGL008475).

    Piedmont Upland Depression Swamp (Pin Oak - Swamp White Oak Type): Quercus palustris - Quercus bicolor / Viburnum prunifolium / Leersia virginica - Impatiens capensis Forest (USNVC: CEGL004643).

    Global/State Ranks: G2.

       (Quantitative compositional and environmental data were collected from four 400 m² sample plots.  Plots were sampled using the relevé method (sensu Peet et al. 1998).  All natural community data were analyzed using a combination of cluster analysis, statistical analyses, and ordination by the Maryland Wildlike and Heritage Program and Virginia Department of Conservation and Recreation, Division of Natural Heritage (DCR-DNH) as part of the United States National Vegetation Classification (USNVC)-National Park Service, National Capital Region (NCR) project.)

       In addition to numerous R,T,&E species and natural communities in harm’s way of proposed multi-use trails at the site, several additional factors have increasingly been found to be highly damaging to exceptionally-rare and sensitive natural resources throughout the greater region.

       It is now widely recognized that invasive exotic species are perhaps the greatest threat to natural areas and global biodiversity (Vitousek et al. 1996, Knight et al. 2009), second only to habitat loss resulting from development and urbanization.  Unfortunately, this trend is expected to increase.

       Chinese Silvergrass (Miscanthus sinensis) is slowly seeding into the large, formerly pristine open grassy area under the powerline along with Ravenna-grass (Tripidium ravennae), from ornamental grass plantings of nearby residences along Palatine Street.  A large clone of Common Reed (Phragmites australis ssp. australis) has become established in a damp swale under the power line.  Japanese Stiltgrass (Microstegium vimineum) and other non-native invasive plants of disturbed soil areas are also increasing their presence at the site. 

       Careful stewardship management is urgently needed to eradicate these grasses and other invasive plants on site before they become established.  Best Management Practices for the area under the power line also need to be discussed with PEPCO (or owner of utility) to minimize activities that cause soil disturbance and nutrient-loading via dumped organic material that alters soils structure and chemistry and causes the spread of non-native invasive plants.   

       Fortunately, most of the non-native invasive plants on site are confined to the edges of the gravel road that traverses the property under the power line.  The forested interiors of the site are still largely pristine and free of invasive plants.  However, that will undoubtedly change if multi-use trails are allowed and constructed.  

       The spread of invasive species correlates directly with soil disturbance, especially when activities creating disturbance are located near a source of invasive species producing seed material.  Moreover, seed material from a source near or far can be transported into relatively pristine or undisturbed natural areas, such as interior forest, where it can persist dormant in the seed bank indefinitely until a disturbance mechanism, natural or otherwise, allows it to emerge (Honu et al. 2009).

       Unprecedented numbers of White-tailed Deer (Odocoileus virginianus), whose population increases directly correspond with human actions, are also causing severe disturbance to herbaceous and understory vegetation throughout forest communities in the eastern U.S. (Knight et al. 2009).  Moreover, an overpopulation of deer results in new infestations of invasive exotic plants, especially Japanese Stiltgrass and Garlic Mustard, into hitherto undisturbed forest, as well as increasing the spread and abundance of invasive species (Knight 2009). 

       In conclusion, creating trails of any kind at the Serpentine Barrens Conservation Park would be highly damaging to fragile soils, geologic features, vegetation, and wildlife, as well as create an active disturbance mechanism for the spread of invasive exotic species.  Additionally, constructing trails and artificial landscape features are not in any way congruent with Best Management Practices and ecological stewardship of rare and sensitive natural areas.  Moreover, there is little need for trails, as the gravel road under the power line is more than sufficient for folks to traverse the site easily and safely.

    Best regards,

    Rod Simmons, Plant Ecologist, Natural Resource Manager, and MNPS Board member

    Marney Bruce, President, Maryland Native Plant Society



    Jason Harrison, Maryland State Vegetation Ecologist

    Chris Frye, Maryland State Botanist

    Jonathan A. McKnight, DNR Associate Director for Habitat Conservation


    Harrison, J.W. 2004. Classification of vegetation communities of Maryland: First iteration. NatureServe and Maryland Natural Heritage Program, Wildlife and Heritage Service, Maryland Department of Natural Resources. Annapolis, Maryland.

    Honu, Y.A., S. Chandy, and D.J. Gibson. Occurrence of non-native species deep in natural areas of the Shawnee National Forest, southern Illinois, U.S.A. Natural Areas Journal 29: 177-87.

    Knight, T.M., J.L. Dunn, L.A. Smith, J.D. Davis, and S. Kalisz. Deer facilitate invasive plant success in a Pennsylvania forest understory. Natural Areas Journal 29: 110-116.

    Peet, R.K., T.R. Wentworth, and P.S. White. 1998. A flexible, multipurpose method for recording vegetation composition and structure. Castanea 63: 262-274.

    Vitousek, P.M., C.M. D’Antonio, L.L. Loope, and R. Westbrooks. 1996. Biological invasions as global environmental change. American Scientist 84: 218-228.

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PO Box 4877, Silver Spring, MD 20914

MNPS is a registered 501(c)(3) charitable organization incorporated in Maryland.
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