Jenny Jump State Forest
Hope, Frelinghuysen, Hope, Liberty, and Independence Townships, Warren County, NJ
4,239 acres


Take Route 80 to exit 12 to Hope. Turn onto Route 519 north at blinking light. At third right, turn onto Shiloh Road. Approximately 1 mile, turn right onto State Park Road.


The dramatic effects of glacier activity  can be seen in the state forest. Much of the boulders and debris from the last glacier were transported by meltwater to the edge of the ice where it was deposited in huge ridges called moraines.

Fairy Hole rock shelter is located at the northeastern end of Jenny Jump Mountain.  As of 1968 (Wacker:21, 31) it contained the best preserved and largest number of animal bones ever associated with an historic Indian site in the Highlands.  It even contained teeth of elk and the now extinct Giant Beaver.


The nearby town of Hope was famous for its Moravian Settlement, founded in 1769.

On May 31, 2000, 724 acres of forested mountain ridge and open fields were added to Jenny Jump State Forest. The tract, purchased from the Pequest Property Company after nearly five years of negotiations and through the perseverance of Green Acres' staffers Jim Bresnen and Renée Jones and former staffers John Denlinger and Kerri Ratcliffe, borders Allamuchy Mountain State Park, at the junction of County Route 517 and Interstate 80, in Allamuchy Township. This newest addition to New Jersey's system of state forests is situated along the Jenny Jump Mountains of Warren County, and will begin a greenway connector westward along Route 80 and the upper watershed of the Pequest River, toward Jenny Jump State Forest.

The property comprises open agricultural fields and mixed hardwood forest - which until the onslaught of the wooly adelgid included abundant Eastern Hemlock - with rock outcroppings, glacial erratics and beautiful views of the surrounding ridges and valleys. Jenny Jump rises to approximately 1,100 feet above sea level, and is one of several large Precambrian gneissic overthrust sheets within the Kittatinny Valley. The mountain top echoed with the sounds of iron mining during the late 1800's. By the turn of the twentieth century, the property was a portion of the vast holdings of John Rutherford Stuyvesant. The Rutherford Mansion was built in 1903-1904 and is presently the Villa Madonna. (Source:


Astronomy Observatory ; boating/canoeing; picnicking; playground; fishing; hunting; cross-country skiing.


Su Summit Trail

Sw Swamp Trail

Sp Spring Trail

O Orchard Trail

E East Trail

C connecting trail: tail leading from end of Swamp Trail up to Summit Trail

and from Summit Trail down to Spring Trail

Charlotte and Ed Newstead

Acer pensylvanicum (striped maple) 5/14/97
Acer rubrum (red maple)
Acer saccharinum (silver maple)
Acer saccharum (sugar maple) Sp
Aesculus hippocastanum (horse chestnut)
Ailanthus altissima (tree of heaven)
Amelanchier arborea (shadbush) 4/20/97
Amelanchier canadensis? (shadbush) Sw
Betula alleghaniensis (yellow birch)
Betula lenta (black birch) Sw
Betula populifolia (gray birch) O
Carpinus carolina (musclewood)
Carya cordiformis (bitternut hickory)
Carya glabra (pignut hickory) Su
Carya ovata (shagbark hickory)
Carya tomentosa (mockernut hickory)
Castanea dentata (American chestnut) Sw
Castanea mollissima (Chinese chestnut) (planted) 6/21/97
Cornus florida (flowering dogwood) Sp 5/08/97 5/27/97
Elaeagnus umbellata (autumn olive) O
Fagus grandifolia (American beech tree) Sw
Fraxinus americana (white ash) Sw
Fraxinus pensylvanica (red ash) Sw
Juglans nigra (black walnut) O
Juniperus virginiana (red cedar)
Larix decidua (European larch) Su
Liquidambar styraciflua (sweetgum) O
Liriodendron tulipifera (tulip tree) Sp
Nyssa sylvatica (tupelo) Sw
Ostrya virginiana (American hop hornbeam) Su
Picea abies (Norway spruce) Sw
Picea rubra (red spruce)
Pinus resinosa (red pine) Sw
Pinus strobus (white pine)
Pinus virginiana (scrub pine)
Populus grandidentata (big-toothed aspen) Sw
Prunus serotina (black cherry) 5/27/97
Prunus virginiana (chokecherry) Su 5/14/97
Quercus alba (white oak)
Quercus prinus (chestnut oak)
Quercus rubra (red oak)
Quercus velutina (black oak) Sw
Rhus copallina (winged sumac) Su
Rhus typhina (staghorn sumac)
Robinia pseudoacacia (black locust) E
Salix caprea (goat willow) 4/20/97
Sassafras albidum (sassafras)
Tilia americana (American basswood) Su
Tsuga canadensis (eastern hemlock)
Ulmus americana (American elm) Su
Ulmus rubra (slippery elm) Sw

Berberis thunbergii (Japanese barberry)
Chimaphila maculata (striped wintergreen)
Gaylussacia baccata (black huckleberry) Su
Hamamelis virginiana (witch hazel) Sw
Ilex verticillata (winterberry) E
Kalmia latifolia (mountain laurel) Sw, Su 6/16/97 6/21/97
Ligustrum vulgare (common privet)
Lindera benzoin (spicebush) 4/20/97
Lonicera morrowii (Morrow's honeysuckle)
Ptelea trifoliata ssp. trifoliata var. mollis (hop tree)
Rhododendron periclymenoides (pinxter flower)
Ribes sativum (garden currant) Sp 5/5/97
Rosa carolina (Carolina rose) Su 6/16/97 6/21/97
Rosa multiflora (multiflora rose) 6/21/97
Rubus alleghaniensis (common blackberry) Sw
Rubus idaeus (red raspberry)
Rubus occidentalis (black raspberry) O
Rubus odoratus (flowering raspberry) Sw
Rubus phoenicolasius (wineberry)
Rubus sp. (blackberry) 6/21/97
Sambucus canadensis (common elderberry) Sp 6/21/97
Sambucus racemosa (red elderberry) Sp 5/14/97
Staphylea trifolia (bladdernut) Sp 6/16/97 fruit
Vaccinium corymbosum (highbush blueberry) E 5/08/97
Vaccinium pallidum (hillside blueberry)
Vaccinium stamineum (deerberry) Su 5/27/97 6/21/97
Viburnum acerifolium (maple-leaf viburnum) 6/16/97
Viburnum prunifolium (blackhaw viburnum) Su 5/27/97
Viburnum rafinesquianum (downy viburnum) Su

Amphicarpaea bracteata (hog peanut)
Celastrus orbiculatus (Asiatic bittersweet)
Clematis occidentalis (purple clematis) Su 5/05/97
Cuscuta sp. (dodder)
Dioscorea villosa (wild yam root) Sp 6/21/97 soon
Menispermum canadense (Canada moonseed) Sp
Parthenocissus quinquefolia (Virginia creeper) Su
Rubus flagellaris (common dewberry) Su 5/27/97 6/21/97
Rubus hispidus (swamp dewberry) Sw
Toxicodendron radicans (poison ivy) Sp
Vitis aestivalis (summer grape)
Vitis labrusca (fox grape) O

Achillea millefolium (yarrow)
Actaea alba (doll's eyes) Sw
Agrimonia sp. (agrimony)
Alliaria petiolata (garlic mustard) 6/21/97
Anemonella thalictroides (rue anemone) Su 4/20/97 5/27/97 6/21/97
Antennaria plantaginifolia (plantain-leaved pussy toes) 4/25/97
Apocynum androsaemifolium (spreading dogbane)
Aquilegia canadensis (wild columbine) Su 5/08/97 5/27/97
Arabis canadensis (sicklepod) Sp 6/16/97 6/21/97
Arabis glabra (tower mustard) 4/20/97 6/05/97
Arabis laevigata (smooth rock cress) 4/20/97
Arabis lyrata (lyre-leaved rockcress) Su 4/20/97 4/25/97 5/27/97 6/21/97
Aralia nudicaulis (wild sarsaparilla)
Arisaema triphyllum (jack-in-the-pulpit) Sp 4/25/97 6/21/97
Artemisia vulgaris (common mugwort)
Asclepias quadrifolia (four-leaved milkweed) Sp 6/16/97 6/21/97
Asclepias syriaca (common milkweed)
Aster divaricatus (white wood aster)
Aster schreberi (Schreber's aster) Sp
Aureolaria virginica (downy false foxglove)
Barbarea vulgaris (common wintercress)
Cardamine laciniata (cut-leaved toothwort) 4/20/97
Cardamine parviflora (small-flowered bittercress) Su 5/05/97 5/27/97 6/21/97
Cerastium vulgatum (mouse-ear chickweed) Sp 6/21/97
Chelone glabra (white turtlehead)
Chrysosplenium americanum (golden saxifrage) O 5/08/97
Cimicifuga racemosa (American bugbane) 6/21/97soon
Circaea lutetiana (enchanter's nightshade)
Cirsium vulgare (bull thistle)
Collinsonia canadensis (horse balm) Sp
Conopholis americana (squawroot) Sp
Corallorhiza maculata (large coralroot)
Corydalis sempervirens (pale corydalis) Su 5/14/97 5/27/97 6/21/97
Cryptotaenia canadensis (honewort) Sp 6/16/97 6/21/97
Daucus carota (Queen Anne's lace)
Desmodium glutinosum (pointed-leaved tick trefoil)
Desmodium nudiflorum (naked-flowered tick trefoil)
Desmodium rotundifolium (round-leaved tick trefoil) Sp
Dicentra cucullaria (Dutchman's breeches) 4/20/97
Duchesnea indica (Indian strawberry)
Epipactis helleborine (helleborine orchid) E
Erechtites hieraciifolia (pilewort)
Erigeron annuus (daisy fleabane) 6/21/97
Erigeron philadelphicus (common fleabane) E 5/27/97
Eupatorium perfoliatum common boneset
Eupatorium rugosum (white snakeroot) Sp
Eupatorium sessilifolium (upland thoroughwort)
Euphorbia cyparissias (cypress spurge)
Festuca pratensis (meadow fescue)
Festuca subverticillata (nodding fescue) Sw
Fragaria virginiana (wild strawberry) O 5/08/97
Galium aparine (cleavers) Su 6/05/97
Galium circaezens (wild licorice) Su 6/21/97
Galium lanceolatum (lance-leaved wild licorice) Su, Sp 6/16/97 6/21/97
Galium trifolium (fragrant bedstraw) Sp 6/21/97
Geranium maculatum (wild geranium) Su 5/14/97 5/27/97
Geranium robertianum (herb Robert) E 5/27/97
Geum canadense (white avens) 6/21/97
Glechoma hederacea (gill over the ground) 6/21/97
Goodyera pubescens (rattlesnake plantain orchid)
Helianthemum sp. (frostweed)
Helianthus divaricatus? (sunflower)
Hepatica americana (blunt-lobed hepatica) Sw
Heuchera americana (alumroot) Su, Sp 6/16/97 6/21/97
Hieracium caespitosum (king devil hawkweed) Sp 6/21/97
Hieracium pilosella (mouse-ear hawkweed) 6/21/97
Hieracium piloselloides (smooth hawkweed) 6/21/97
Hieracium venosum (rattlesnake hawkweed) Sp 6/16/97 6/21/97
Hypericum punctatum (punctate st. johnswort) Sp 6/21/97 soon
Hypoxis hirsuta (yellow stargrass) Su 5/27/97 6/16/97 6/21/97
Impatiens capensis (orange jewelweed)
Krigia biflora (two flowered Cynthia) 6/21/97
Krigia virginica (dwarf dandelion) Su
Lactuca canadensis (wild lettuce)
Lepidium campestre (field peppergrass) O 6/16/97
Lespedeza procumbens (bush clover)
Linaria vulgaris (butter and eggs) Su 6/16/97
Lysimachia quadrifolia (whorled loosestrife) 6/21/97
Maianthemum canadense (Canada mayflower)
Medicago lupulina (black medick)
Melampyrum lineare (cowwheat) Sp 6/05/97 6/21/97
Melilotus officinalis (yellow sweet clover) 6/21/97
Mitchella repens (partridgeberry) Sp 6/21/97
Osmorhiza claytonii (sweet cicely) C 5/27/97
Osmorhiza longistylis (aniseroot) Sp
Oxalis europaea (tall yellow wood sorrel) Su, Sw 6/05/97 6/21/97
Paronychia canadensis (slender forked chickweed) Sp 6/21/97
Pedicularis canadensis (wood betony) C 5/05/97
Phryma leptostachya (dropseed)
Phytolacca americana (pokeweed) Sp
Pilea pumila (clearweed)
Plantago lanceolata (English plantain) 6/21/97
Plantago major (common plantain)
Podophyllum peltatum (mayapple) Sp 4/25/97 5/27/97
Polygonatum biflorum (smooth Solomon's seal) Su 5/14/97
Polygonatum pubescens (hairy Solomon's seal) Su 5/14/97 6/21/97
Polygonum cespitosum (cespitose knotweed) Sp 6/21/97
Polygonum scandens (climbing false buckwheat)
Polygonum virginianum (jumpseed) Sp
Potentilla norvegica (rough cinquefoil) Sp 6/21/97
Potentilla simplex (common cinquefoil) Su 6/21/97
Prenanthes trifoliata (tall rattlesnake root)
Prunella vulgaris (self-heal)
Pycnanthemum incanum (hoary mountain mint)
Pyrola americana (round-leaved pyrola) Sw
Ranunculus abortivus (kidney-leaf buttercup) 4/25/97
Ranunculus recurvatus (hooked buttercup) Sp
Rumex acetosella (sheep sorrel) 6/21/97
Rumex crispus (curled dock) Sp
Rumex obtusifolius (broad-leaved dock) Sw
Sanguinaria canadensis (bloodroot) Sp
Sanicula canadensis (black snakeroot) 6/21/97
Sanicula marilandica (black snakeroot)
Saponaria officinalis (soapwort)
Saxifraga virginiensis (early saxifrage) Su 4/20/97 5/27/97
Scutellaria lateriflora (mad-dog skullcap)
Senecio obovatus (round-leaved ragwort) Sp 6/05/97
Silene vulgaris (bladder campion) Su 6/16/97 6/21/97
Silene latifolia (white campion) O 6/16/97 6/21/97
Silene stellata (starry campion)
Sisyrinchium angustifolium (blue eyed grass) Sp 6/05/97 6/21/97
Smilacina racemosa (Solomon's plume) Su 5/27/97
Solidago arguta (goldenrod)
Solidago caesia (blue-stem goldenrod) Sp
Solidago flexicaulis (zig-zag goldenrod)
Solidago juncea (early goldenrod)
Stellaria media (common chickweed)
Symplocarpus foetidus (skunk cabbage)
Taraxacum officinale (dandelion) 6/21/97
Thalictrum dioicum (early meadowrue) O 5/8/97
Thalictrum pubescens (tall meadowrue)
Trifolium pratense (red clover) 6/21/97
Trifolium repens (white clover) 6/21/97
Triodanis perfoliata (Venus' looking-glass) Su 6/21/97
Triosteum angustifolium (lesser horse gentian)
Tussilago farfara (colt's foot) 4/25/97
Uvularia perfoliata (perfoliate bellwort) Su 5/14/97
Uvularia sessilifolia (sessile-leaved bellwort) Sp 5/14/97
Veratrum viride (swamp hellebore) Sp
Verbascum thapsus (common mullein)
Veronica arvensis (corn speedwell) Su 5/05/97
Veronica officinalis (common speedwell) Sw 6/05/97 6/21/97
Viola conspersa (dog violet)
Viola cucullata? (marsh blue violet?)
Viola fimbriatula (ovate-leaved violet) 4/25/97
Viola palmata (palmate-leaved violet) Su 5/27/97
Viola pubescens (downy yellow violet) 4/25/97
Viola sagittata (arrowhead violet)
Viola sororia (common blue violet) 5/05/97 5/27/97
Viola triloba ( three-lobed violet) Su 4/25/97 5/27/97

Rushes and Sedges:
Carex complanata var. hirsuta? (flattened sedge) Sp
Carex crinita (fringed sedge)
Carex cristatella? (crested sedge) Sp
Carex digitalis (sedge)
Carex laxiculmis (spreading sedge) Sw
Carex laxiflora (sedge)
Carex pensylvanica (Pennsylvania sedge) Sw 4/20/97
Carex rosea (rose sedge) Sw
Carex scoparia (pointed broom sedge) Su
Carex swanii (Swan's sedge) Sp
Juncus tenuis (path rush)
Luzula multiflora (woodrush) 4/20/97
Scirpus atrovirens (dark green bulrush)
Scirpus hattorianus (bulrush)
Scirpus verecundus (few flowered club rush) Sw

Anthoxanthum odoratum (sweet vernal grass) O
Brachyelytrum erectum (long-awned wood grass)
Bromus pubescens (hairy brome grass) Sp
Dactylis glomerata (orchard grass)
Danthonia spicata (common wild oat grass) Sp
Elymus hystrix (bottlebrush grass)
Glyceria striata (fowl mannagrass)
Lolium perenne (English rye grass)
Lycopodium lucidulum (shining clubmoss)
Microstegium vimineum (Japanese stilt grass)
Panicum boscii (Bosc's panic grass) Sp 6/16/97
Panicum depauperatum (starved panic grass) Sp
Panicum dichotomum (forked panic grass)
Panicum lanuginosum (panic grass)
Phleum pratense (timothy grass)
Poa annua (annual bluegrass)
Poa compressa (Canada bluegrass) Su
Poa pratensis (Kentucky bluegrass)
Poa trivialis (rough bluegrass)
Schizachyrium scoparium (little blue stem grass)

Ferns and Fern Allies:
Equisetum arvense (field horsetail)
Adiantum pedatum (maidenhair fern) C
Asplenium platyneuron (ebony spleenwort)
Athyrium filix-femina v angustum (northern lady fern)
Athyrium thelypteroides (silvery glade fern) Sp
Botrychium virginianum (rattlesnake grape fern) Sw, Sp
Cystopteris fragilis var. mackayi (Mackay's fragile fern) O
Dennstaedtia punctilobula (hay-scented fern) Su
Dryopteris carthusiana (spinulose woodfern)
Dryopteris intermedia (intermediate woodfern)
Dryopteris marginalis (marginal woodfern) Su
Onoclea sensibilis (sensitive fern)
Osmunda cinnamomea (cinnamon fern)
Osmunda claytoniana (interrupted fern) O
Polypodium virginianum (rock cap fern) Sp
Polystichum acrostichoides (Christmas fern)
Pteridium aquilinum (bracken fern)
Thelypteris hexagonoptera (broad beech fern)
Thelypteris noveboracensis (New York fern)
Woodsia obtusa (blunt cliff fern)

Jenny Jump State Forest, Warren County, New Jersey, June 21, 1997.

Sultry weather did not at all dampen the spirits of the Torrey group in its quest for new and familiar species at Jenny Jump State Forest. Along the Spring Trail, which wound its way between boulders and rock outcroppings before passing into deep woods, we discovered a trio of bedstraws in bloom, wild licorice (Galium circaezens), lance-leaved wild licorice (G. lanceolatum ) and fragrant bedstraw (G. triflorum), as well as four-leaved milkweed (Asclepias quadrifolia) and short-styled sanicle (Sanicula canadensis). More showy were the dense, vivid fruit-clusters of red-berried elder (Sambucus racemosa ) and the inflated paper capsules of bladder-nut (Staphylea trifolia). Wild geranium (Geranium maculatum), bloodroot (Sanguinaria canadensis), swamp hellebore (Veratrum viride) sweet cicely (Osmorhiza claytonii), aniseroot (O. longistylis), smooth rockcress (Arabis laevigata), tower mustard (A. glabra) and sicklepod (A. canadensis) were also in fruit. Sharp-leaved goldenrod (Solidago arguta), early goldenrod (S. juncea), Schreber's aster (Aster schreberi), upland thoroughwort (Eupatorium sessilifolium), palmate-leaved violet (Viola palmata), ovate-leaved violet (V. fimbriatula), and dotted St. Johnswort (Hypericum punctatum) were recognized by their leaves. Some vines in their leaf stage were Canada moonseed (Menispermum canadense), wild yamroot (Dioscorea villosa), and prostrate tick-trefoil (Desmodium rotundifolium). Squawroot (Conopholis americana) was still another find.

After a trailside lunch and a view of black cohosh (Cimicifuga racemosa) in bud, we climbed to the Summit Trail where the terrain was drier and more open to a passing breeze. On a rock-pile was a vine rare in New Jersey, purple clematis (Clematis occidentalis) that had twined its leaf-stems around a chokecherry (Prunus virginiana) in its reach for sunlight. The large translucent flowers of early May were now silvery plumed achenes. Shortstalk arrowwood (Viburnum rafinesquianum) and striped maple (Acer pensylvanica) were well-represented, and both pasture rose (Rosa carolina) and mountain laurel (Kalmia latifolia) were in full bloom. Other plants in flower were common dewberry (Rubus flagellaris), narrow-leaved blue-eyed grass (Sisyrinchium angustifolium, pale corydalis (Corydalis sempervirens), Venus' looking-glass (Triodanis perfoliata), and cow-wheat (Melampyrum lineare), as well as various hawkweeds, Hieracium caespitosum, H. pilosella, H. piloselloides, and H. venosum. Alumroot (Heuchera americana), downy shadbush (Amelanchier arborea), hairy Solomon's seal (Polygonatum pubescens), and smooth Solomon's seal (P. biflorum) were at the fruiting stage. A monumental glacial erratic and a glacier-carved rounded hill in the near-distance were also points of interest. Finally, on the way down to the parking area, a fourth Arabis was seen, lyre-leaved rock-cress (A. lyrata), with both fruit and flowers.

Among the grasses found were hairy brome (Bromus pubescens), tall oat grass (Danthonia spicata), nodding fescue (Festuca verticillata), fowl mannagrass (Glyceria striata), Bosc's panic-grass (Panicum boscii), forked panic-grass (P. dichotomum), panic-grass (P. lanuginosum var. fasciculatum), and little bluestem (Schizachyrium scoparium).

Ferns included ebony spleenwort (Asplenium platyneuron), silvery glade fern (Athyrium thelypteroides), rattlesnake fern (Botrychium virginianum), fragile fern (Cystopteris tenuis), spinulose woodfern (Dryopteris carthusiana), interrupted fern (Osmunda claytoniana), rock polypody (Polypodium virginianum), broad beech-fern (Thelypteris hexagonoptera), and blunt-lobed cliff fern (Woodsia obtusa).

Total attendance was 13. Robert C. Myer, Jr. and William F. Standaert provided a number of plant identifications. The leaders were Ed and Charlotte Newstead.