Warren County, NJ


From New York City, take US 80 west to Exit 19. Turn/bear right onto Route 612 north. Nearing Johnsonburg center turn right onto route 519; then turn left onto Route 661 (Ramsey Road).  At the T-intersection, turn right onto Route 94.  Drive into Sussex County and turn right on Yellow Frame Road. Drive down the road and across from a house with horses park at the pull-off space near an open field.  Walk along the eastern side of the field until you pick up the trail as you enter the woods at  the end of the field.  


Here there is a limestone bedrock that produces calcium-rich soil. Dolomite.

In an article on the "Caves of New Jersey, Bulletin 70" by Richard F. Dalton (Senior Geologist), June 1976, there is a Yellow Frame Cave that is the largest of several caves in the ravines and ledges on top of a ridge that rises very steeply northwest of a marshy pond. There are five other caves on the ridge also, but they are very small.


Samuel Green was the first European settler in the area in 1730. He was a prominent surveyor. The Erie-Lackawanna Railroad ran through Johnsonburg (closing in the 1970s).

The name Johnsonburg refers to an early postmaster.


There is a big field here. Pick up the trail on the eastern edge of the field, bordering a woods edge. This trail goes by fields and woods until it goes into a rich woods. The trail goes into a small limestone infused rock cliff valley. Look here for a left turn that will take you up on the ridge on the left. This small trail takes you to a wonderful overlook. Mud Pond is below.

Getting back to the main trail, you will be walking on a ridge overlooking Mud Pond on the west side. If you keep going you will leave the property of the Nature Conservancy. There is a yellow blazed trail that goes along part of the ridge trail. I do not know where it goes.

If you keep going, the path descends to lake level where you can make a left turn to see Mud Pond.

I stayed very briefly along the edge just to get a good look. The Nature Conservancy does not want you to disturb Mud Pond. But, of course, given the lack of enforcement of laws in general in the United States, only the botanists and good hikers will obey the rules, while others will do whatever they want. Found some oars down by Mud Pond, so someone is taking advantage of the lake.


Dr. Patrick L. Cooney

And a plant list compiled by Sarah-David Rosenbaum from a trip on 5/21/2005 with Nancy Slowik and the Green Brook Nature Sanctuary.

dates = plants found in bloom on dates of field trips

According to an article by The Nature Conservancy, other plants here include:

Botrychium multifidum (leather grapefern)
Carex eburnea (ebony sedge)
Oryzopsis asperifolia (white-grained mountain rice grass)
Utricularia minor (lesser bladderwort)
Salix candida (hoary willow)

Acer rubrum (red maple)
Acer saccharum (sugar maple)
Ailanthus altissima (tree of heaven)
Amelanchier sp. (shadbush)
Betula lenta (black birch)
Betula populifolia (gray birch)
Carya cordiformis (bitternut hickory) 6/06/99
Carya glabra (pignut hickory)
Carya ovata (shagbark hickory)
Carya tomentosa (mockernut hickory)
Celtis occidentalis (hackberry)
Cornus florida (flowering dogwood)
Fraxinus americana (white ash)
Fraxinus pensylvanica (green ash)
Juglans cinera (butternut walnut)
Juglans nigra (black walnut)
Juniperus virginiana (red cedar)
Liriodendron tulipifera (tulip tree) 6/06/99 6/29/98
Morus alba (white mulberry)
Ostrya virginiana (Eastern hop hornbeam) 6/06/99 6/9/98 in fruit
Pinus strobus (white pine)
Populus grandidentata (big tooth aspen)
Prunus avium (sweet cherry)
Prunus serotina (black cherry)
Pyrus x sp. (hybrid apple)
Quercus alba (white oak)
Quercus muhlenbergii (yellow oak)
Quercus palustris (pin oak)
Quercus prinus (chestnut oak)
Quercus rubra (red oak)
Quercus velutina (black oak)
Sassafras albidum (sassafras)
Tilia americana (American linden)
Tsuga canadensis (hemlock)
Ulmus americana (American elm)

Berberis thunbergii (Japanese barberry)
Ceanothus americanus (New Jersey tea) 6/06/99near
Cornus racemosa (gray-stemmed dogwood) 6/06/99near; 6/9/98
Corylus cornuta (beaked hazel)
Chimaphila maculata (spotted wintergreen) 7/04/98
Elaeagnus umbellata (autumn olive)
Hamamelis virginiana (witch hazel)
Ilex verticillata (winterberry)
Ligustrum sp. (privet) 6/9/98
Lindera benzoin (spice bush)
Mitchella repens (partridgeberry)
Rhus typhina (staghorn sumac)
Rosa multiflora (multiflora rose) 6/06/99 6/9/98
Rosa palustris (swamp rose) 6/29/98
Rubus occidentalis (black raspberry)
Rubus phoenicolasius (wineberry)
Rubus sp. (blackberry) 6/06/99
Salix candida (hoary willow)
Sambucus canadensis (elderberry) 6/9/98
Sambucus racemosa (red berried elder) 6/06/99 near
Viburnum acerifolium (maple leaf viburnum) 6/06/99
Viburnum dentatum var. lucidum (smooth arrowwood viburnum) 6/06/99
Viburnum lentago (nannyberry viburnum -- the one with the winged petiole)
Viburnum prunifolium (blackhaw viburnum)
Zanthoxylum americanum (Northern prickly ash)

Amphicarpaea bracteata (hog peanut)
Ampelopsis brevipedunculata (porcelain berry)
Apios americana (groundnut)
Calystegia sepium (hedge bindweed)
Celastrus orbiculatus (Asiatic bittersweet)
Lonicera japonica (Japanese honeysuckle) 6/9/98
Parthenocissus quinquefolia (Virginia creeper)
Menispermum canadense (moonseed)
Toxicodendron radicans (poison ivy) 6/06/99
Vitis riparia (riverbank grape)
Vitis sp. (grape)

Achillea millefolium (yarrow) 6/29/98
Actaea alba (white baneberry)
Actaea rubra (red baneberry) 6/29/98 and 7/04/98 in fruit
Agrimonia rostellata (beaked agrimony) 6/29/98 7/04/98 raceme without hairs
Alliaria petiolata (garlic mustard) 5/21/05 6/06/99 6/9/98 6/29/98 7/04/98
Allium canadense (wild garlic)
Anemone virginiana (thimbleweed) 7/04/98
Anemonella thalictroides (rue anemone) 5/21/05  6/06/99 6/9/98
Antennaria plantaginifolia (plantain-leaved pussytoes) in fruit
Apocynum sp. (dogbane) short petioles pale under
Aquilegia canadensis (columbine)  5/21/05
Arabis lyrata (lyre-leaved rockcress) 6/06/99 7/04/98
Aralia nudicaulis (wild sarsaparilla)
Arctium minus (lesser burdock)
Arisaema triphyllum (jack in the pulpit) 5/21/05  6/06/99
Artemisia vulgaris (common mugwort)
Asclepias exaltata (poke milkweed) 6/06/99
Asclepias syriaca (common milkweed) 6/29/98
Aster divaricatus (white wood aster)
Aureolaria flava (false foxglove)
Aureolaria virginica (downy false foxglove) 6/29/98
Barbarea vulgaris (common wintercress) 6/9/98
Campanula rotundifolia (harebell) 6/29/98 7/04/98
Capsella bursa-pastoris (shepherd's purse) 6/9/98
Carduus acanthoides (thistle) 7/04/98
Caulophyllum thalictroides? (blue cohosh?)
Centaurea maculosa (spotted knapweed) 7/04/98
Cerastium vulgatum (mouse-ear chickweed) 6/06/99
Chelidonium majus (celandine poppy) 5/21/05 6/06/99 6/9/98 6/29/98 7/04/98
Chrysanthemum leucanthemum (ox eye daisy) 6/9/98 6/29/98 7/04/98
Cichorium intybus (chicory) 6/29/98 on the roadside
Cimicifuga racemosa (American bugbane) 7/04/98
Circaea lutetiana (enchanter's nightshade) 6/29/98 7/04/98
Cirsium arvense (Canada thistle) 6/9/98 6/29/98
Cirsium vulgare (bull thistle)
Collinsonia canadensis (horsebalm)
Conopholis americana (squawroot) 6/06/99
Cryptotaenia canadensis (honewort) 6/06/99 6/9/98
Cypripedium calceolus var. parviflorum (small yellow lady's slipper)
Desmodium glutinosum (pointed tick trefoil) 6/29/98 7/04/98
Desmodium rotundifolium (round leaved tick trefoil)
Dianthus armeria (Deptford pink) 6/9/98 6/29/98 7/04/98
Dicentra cucullaria (Dutchmen's britches)  
Epipactis helleborine (helleborine orchid) 7/04/98 soon to bloom
Erigeron annuus (daisy fleabane) 5/21/05  6/29/98
Erigeron philadelphicus (Philadelphia fleabane) 6/06/99 6/9/98
Eupatorium rugosum (white snakeroot)
xFragaria virginiana (wild strawberry) 5/21/05  6/9/98
Galinsoga quadriradiata (galinsoga) 6/29/98 7/04/98
Galium aparine (cleavers) 5/21/05  6/06/99
Galium asprellum (rough bedstraw) 6 in whorl
Galium circaezens (wild licorice) 6/06/99 near
Galium lanceolatum (pointed-leaved wild licorice)
Galium mollugo (wild madder) 6/9/98
Geranium maculatum (wild geranium) 5/21/05  6/06/99  6/9/98
Geum canadense (white avens) 6/29/98
Geum laciniatum (rough avens) 6/29/98
Glechoma hederacea (gill-over-the-ground)  5/21/05
Helianthus divaricatus (woodland sunflower) 6/29/98 sl rough stem
Hemerocallis fulva (day lily) 6/29/98 on the roadside
Hepatica americana (round-lobed hepatica)
Hieracium caespitosum (yellow kind devil hawkweed) 6/06/99 6/9/98
Hieracium sp. (hawkweed) 6/29/98
Hieracium venosum (rattlesnake hawkweed) 6/06/99 6/9/98 6/29/98
Hypericum perforatum (common St. Johnswort) 7/04/98
Hypoxis hirsuta (yellow stargrass) 5/21/05  6/06/99
Impatiens capensis (orange touch me not)
Impatiens capensis (jewelweed)
Iris versicolor (northern blue flag) 6/06/99
Kolkwitzia amabilis (beauty bush) 6/06/99
Lemna minor (duckweed)
Lespedeza procumbens (bush clover)
Linaria vulgaris (butter and eggs) 7/04/98
Lobelia spicata (spike lobelia) 7/4/98
Lycopus sp. (water horehound)
Lycopus virginicus (Virginia water horehound)
Lysimachia quadrifolia (whorled loosestrife)
Lythrum salicaria (purple loosestrife)
Matricaria matricarioides (pineapple weed) 6/9/98 6/29/98
Medicago lupulina (black medick)  
Melampyrum lineare (cowwheat) 6/29/98
Melilotus officinalis (yellow sweet clover) 7/04/98
Mitella diphylla (mitrewort)
Monotropa uniflora (Indian pipe) 6/29/98 7/04/98
Nepeta cataria (catnip)
Nymphaea odorata (white water lily) 6/29/98
Osmorhiza claytonii (sweet cicely)
Oxalis stricta (yellow wood sorrel) 6/06/99 6/9/98 6/29/98 7/04/98
Panax quinquefolius (ginseng) 7/04/98
Parietaria pensylvanica (pellitory)
Pastinaca sativa Rumex crispus (curled dock)
Pedicularis canadensis (wood betony)
Penstemmon digitalis (foxglove beardtongue) 6/9/98 6/29/98 7/04/98
Phlox subulata (moss phlox) 6/06/99
Phytolacca americana (pokeweed)
Pilea pumila (clearweed)
Plantago lanceolata (English plantain) 6/9/98 6/29/98 7/04/98
Plantago major (common plantain)
Podophyllum peltatum (may apple)
Polygonatum pubescens (hairy true Solomon's seal)  5/21/05
Polygonum cespitosum (cespitose knotweed) 6/9/98 6/29/98 7/04/98
Polygonum virginianum (jumpseed knotweed)
Potentilla recta (rough fruited cinquefoil)  6/9/98 7 lvs palmate hairy plant 6/29/98
Potentilla simplex (common cinquefoil) 6/9/98
Prunella vulgaris (self-heal) 6/29/98 7/04/98
Pycnanthemum tenuifolium (mountain mint)
Pyrola elliptica (shinleaf) 7/4/98
Ranunculus abortivus (small-flowered crowfoot)
Ranunculus acris (tall buttercup) 5/21/05 6/06/99 6/9/98 6/29/98 7/4/98
Ranunculus bulbosus (bulbous buttercup)  5/21/05
Ranunculus recurvatus (hooked buttercup)
Rudbeckia hirta var. pulcherrima (black-eyed Susan) 6/29/98 7/4/98
Rumex acetosella (sheep sorrel dock) 6/06/99
Rumex crispus (curled dock)
Rumex obtusifolius (broad-leaved dock)
Sanicula canadensis (black snakeroot) 6/06/99
Satureja vulgaris (wild basil) 6/29/98 7/4/98
Saxifraga virginiensis (early saxifrage)  5/21/05
Scrophularia lanceolata (hare figwort) undeveloped stamen green 6/06/99 6/9/98
Senecio obovatus (running groundsel) 5/21/05  6/06/99
Silene latifolia (white campion)
Silene vulgaris (bladder campion) 6/9/98 6/29/98
Silene latifolia (white campion) 6/9/98 6/29/98 7/04/98
Smilacina racemosa (false Solomon's seal)
Solidago caesia (blue stem goldenrod)
Solidago flexicaulis (zigzag goldenrod)
Solidago gigantea (smooth goldenrod)
Solidago rugosa (rough-stemmed goldenrod)
Spirodela polyrhiza (water flaxseed)
Stellaria media (common chickweed) 6/9/98
Symplocarpus foetidus (swamp cabbage)
Taraxacum officinale (dandelion) 6/9/98
Thalictrum dioicum (early meadowrue)
Thalictrum pubescens (tall meadowrue)
Thaspium sp. (meadow parsnip)
Tragopogon pratensis (yellow goatsbeard) 6/06/99 6/9/98 6/29/98 7/04/98
Trifolium aureum (yellow clover) 6/9/98 6/29/98 7/04/98
Trifolium incarnatum (crimson clover) 6/29/98 7/04/98
Trifolium pratense (red clover) 6/06/99 6/9/98 6/29/98 7/04/98
Trifolium repens (white clover) 6/06/99 6/9/98 6/29/98 7/04/98
Triosteum aurantiacum (horse gentian) 6/06/99
Tussilago farfara (coltsfoot)
Typha latifolia (broad-leaved cat tail)
Utricularia minor (lesser bladderwort)
Uvularia perfoliata (perfoliate leaved bellwort)  5/21/05
Uvularia sessilifolia (sessile-leaved bellwort)
Vaccinium stamineum (deerberry) 6/06/99 6/09/98
Verbascum blattaria (moth mullein) 6/29/98
Verbascum thapsus (common mullein) 6/29/98
Veronica arvensis (corn speedwell)  5/21/05
Veronica officinalis (common speedwell) 6/06/99 6/9/98
Viola palmata (palmate-leaved violet)
Viola pubescens (yellow forest violet)
Wolffia sp. (water meal)
Zizia aurea (heart-leaved Alexander)

Rushes and Sedges:
Carex eburnea (ebony sedge)
Carex laxiflora type
Carex pensylvanica (Pennsylvania sedge)
Carex stipata
Carex stricta (tussock sedge)
Juncus tenuis (path rush)
Luzula multiflora (wood rush)

Anthoxanthum odoratum (sweet vernal grass)
Bromus inermis (smooth brome grass) 6/06/99 near
Dactylis glomerata (orchard grass) 6/06/99
Festuca pratensis (meadow fescue) 6/06/99 near
Leersia virginica (white grass)
Lolium perenne (the grass with its side to the stem)
Microstegium vimineum (Japanese stilt grass)
Oryzopsis asperifolia (white-grained mountain rice grass)
Panicum boscii (panic grass) 6/06/99 near
Phalaris arundinacea (reed canary grass) 6/06/99
Phleum pratense (timothy grass) 6/29/98
Poa annua (annual blue grass)
Poa compressa (Canada blue grass)
Poa pratensis (Kentucky blue grass)

Ferns and Fern Allies:
Adiantum pedatum (maidenhair fern)
Asplenium platyneuron (ebony spleenwort)
Asplenium rhizophyllum (walking fern)
Asplenium ruta-muraria (wallrue spleenwort)
Asplenium trichomanes (maidenhair spleenwort)
Athyrium filix-femina (lady fern)
Botrychium multifidum (leather grapefern)
Botrychium virginianum (rattlesnake fern)
Cystopteris bulbifera (bulblet fern)
Cystopteris fragilis var. mackayi (= C. tenuis ) (Mackay's brittle fern)
Dennstaedtia punctilobula (hay-scented fern)
Dryopteris carthusiana (spinulose wood fern)
Dryopteris cristata (crested woodfern)
Dryopteris intermedia (fancy woodfern)
Dryopteris marginalis (marginal woodfern)
Lycopodium lucidulum (shining clubmoss)
Onoclea sensibilis (sensitive fern)
Osmunda regalis (royal fern)
Osmunda claytoniana (interrupted fern)
Osmunda cinnamomea (cinnamon fern)
Pellaea atropurpurea (purple cliffbrake fern)
Polystichum acrostichoides (Christmas fern)
Thelypteris hexagonoptera (southern beech fern)
Thelypteris noveboracensis (New York fern)
Thelypteris palustris (marsh fern)
Thelypteris noveboracensis (New York fern)
Woodsia obtusa (blunt-lobed woodsia)