Vascular Plant Flora of Patuxent Research Refuge
Authors: Bill Harms
Locality: Patuxent Research Refuge (39.060200, -76.780700)
Abstract:


Established in 1936 by executive order of President Franklin D. Roosevelt, the Patuxent Research Refuge is the nation's only national wildlife refuge established to support wildlife research. It is located between Washington, DC and Baltimore, MD.

CT=Central Tract
NT=North Tract
ST=South Tract

Nativity to refuge - Native, exotic, and uncertain.

Abundance qualifiers for refuge.
Abundant: occurring usually in large numbers or occupying large areas.
Common: plentiful throughout.
Frequent: widely distributed; occasionally plentiful.
Infrequent: occurring only occasionally.
Rare: not often found owing to its scarcity.
Local: restricted to a particular area.

The checklist uses Weakley 2022 with minor modifications for taxonomic nomenclature.

For additional information about this checklist, please contact: Bill Harms (botanybill@philcobill.com)

For comments about or corrections to individual entries, please leave a comment on the individual species page. Or contact Bill at the above email address

This is a work in progress and as such please use the data with care.


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Families: 148
Genera: 564
Species: 1295
Total Taxa: 1312

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Festuca octoflora Walt. - Eight-Flower Six-Weeks Grass
Open woods, Single station, exotic. First known report in Maryland; Bill Harms 7992 [USFWS]
Roadsides and encroaching into woods, common, locally abundant, exotic; increasing throughout refuge.; Bill Harms 8657 [USFWS], Bill Harms 8218 [USFWS], Bill Harms 9113 [USFWS], Bill Harms 8566 [USFWS], more...
Panicum amarum Ell. - Bitter Panic Grass
Panicum dichotomiflorum Michx. - Autumn Panic Grass
Paspalum laeve Michx. - Field Crown Grass
Poa bulbosa L. - Bulbous Blue Grass
Adiantum pedatum L. - Northern Maidenhair
Bottomland slope, local, one station, native, CT; N. Hotchkiss s.n. [USFWS], N. Hotchkiss s.n. [USFWS]
Aquilegia canadensis L. - Red Columbine
"Wildflower" garden, local, one station, exotic, NT, persisting, planted; Bill Harms 8284 [USFWS]
Ceanothus americanus L. - New Jersey-Tea
Margins of lakes and ponds, roadside ditches, infrequent, locally frequent, native, CT, NT, ST; Bill Harms 6827 [MARY], Bill Harms 6827 [USFWS], N. Hotchkiss 5494 [USFWS]
Agrimonia pubescens Wallr. - Soft Grooveburr
Edge of field, local, one station, native, CT; N. Hotchkiss 5780 [USFWS]
Open fields, wet areas woods margins, infrequent, native, CT, NT, ST; Bill Harms 9762 [USFWS], Bill Harms 7767 [USFWS], Bill Harms 9695 [USFWS], N. Hotchkiss 5097 [USFWS]
"Wet soil", local, known from one station, native, ST; F. M. Uhler s.n. [USFWS]
Wood edges, pond edge, infrequent, locally common, native, CT, NT, ST; N. Hotchkiss 6497 [USFWS], Bill Harms 9507 [USFWS], N. Hotchkiss 5792 [USFWS]
Galium tinctorium (L.) Scop. - Stiff Marsh Bedstraw
Acer negundo L. - Ash-Leaf Maple
Acer pseudoplatanus L. - Sycamore Maple
Next to house, waif, exotic, planted, CT; F. M. Uhler s.n. [USFWS]
Acer saccharinum L. - Silver Maple
Bottomlands, and adjacent areas, common to abundant, native, CT, NT, ST; Bill Harms 6304 [MARY], Bill Harms 7192 [USFWS], N. Hotchkiss 5683 [USFWS], Bill Harms 6304 [USFWS]
Aesculus parviflora Walter - Bottlebrush Buckeye
Next to building, local, one station, exotic, planted, CT; Bill Harms 9309 [MARY], Bill Harms 9309 [USFWS]
Hedgerow, open fields, common, locally abundant, exotic, CT, NT, ST, eridication effort underway; Bill Harms 6669 [MARY], Bill Harms 9774 [USFWS], N. Hotchkiss 6703/7003 [USFWS], Bill Harms 6669 [USFWS]
Smilax bona-nox L. - Fringed Greenbrier
Alkekengi officinarum Moench - Chinese Lantern Plant
Flower garden weed, local, one station, exotic, NT, persisting; Bill Harms 6634 [MARY], Bill Harms 6845 [MARY], Bill Harms 6634 [USFWS], Bill Harms 6845 [USFWS]
Physalis longifolia Nutt. - Long-Leaf Ground-Cherry
Ulmus americana L. - American Elm
Urtica dioica L. - Stinging Nettle
Sambucus canadensis L. - Common Elderberry
Infrequent; wet to moist areas, hedgerows;, CT NT ST, native; Bill Harms 6626 [MARY], Bill Harms 6626 [USFWS], N. Hotchkiss 5221 [USFWS]
Viburnum opulus L. - Highbush-Cranberry
Single station; garden, ST, exotic, cultivated; Ann Coren 51 [USFWS], Bill Harms 8288 [USFWS]
Viburnum recognitum Fernald - Southern Arrow-Wood
Frequent, locally common; edge of woods and open areas, CT NT ST, native; N. Hotchkiss 5834 [USFWS], Bill Harms 6494 [USFWS]
Woods edges, hedgerows, open areas, frequent, locally common, exotic, CT, NT, ST; Bill Harms 6682 [MARY], Bill Harms 6682 [USFWS]