Maryland Plant Atlas

Digital Atlas of the Maryland Flora

Click onto the following link to enter the site:

The Digital Atlas of Maryland Flora was launched to the public in October of 2015.



The Maryland Plant Atlas endeavors to provide authoritative distribution maps for all the native and naturalized plants of Maryland based on the best available data;  to provide accurate and up-to-date information on the flora to the public;  and to promote conservation and research by increasing awareness and appreciation for wild plants.


We have included every species of vascular plant, bryophyte and algae that is native or naturalized in Maryland.  The original checklist of vascular plants was based on Knapp and Naczi (2014 unpublished) and has been subsequently updated.   This is very much a work in progress.  Not all species records have been imported and most records have not yet been assigned to quads.


The Maryland Biodiversity Project is excited to announce the release of their new Maryland Plant Atlas web site, and are partnered with the Maryland Department of Natural Resources (DNR) and University of Maryland’s Norton-Brown Herbarium (NBH) on this perpetual atlas of Maryland’s flora.  Data collected by these teams and partners will be fused to create the most complete view of Maryland’s flora ever assembled.  Features include quad-level maps, specimen photos, mobile optimization, and a powerful advanced search.

Mark’s Commentary:

The Brown and Brown 1972 Woody Plants of Maryland and 1984 Herbaceous Plants of Maryland are woefully outdated and species distribution was primarily determined by University of Maryland herbaria and student collections.  Pennsylvania and Virginia have both recently published excellent updated floras of their states, with Maryland lagging behind.


The Maryland Plant Atlas, which reminds me of the recent Maryland Amphibian and Reptile Atlas (MARA) is sure to go a long way in improving the understanding of plant life-cycle phenology, refinement of natural community classification of ecological groups and vegetation community types, species distribution and commonality, that being, is the plant in question abundant, common, uncommon, watch-list, rare, threatened and/or endangered.

I have every intention is using this website with regularity.  Thank you to the staff of the Maryland Plant Atlas and Biodiversity Project.