The California Black Walnut ( Juglans californica ), endemic to California, grows on the northern side of the mountains in the Valley and Griffith Park.

The predominant native tress are Coast Live Oak ( Quercus agrifolia ), California Black Walnut ( Juglans californica ), and California Sycamore ( Platanus racemosa ).

Tree species for which the forest is important include bigcone Douglas-fir ( Pseudotsuga macrocarpa ), Coulter Pine ( Pinus coulteri ), and California Walnut ( Juglans californica ).

Trees in the Arboretum include: Acacia dealbata, Acer campestre, Acer negundo, Acer paxii, Acer saccharinum, Aesculus x carnea, Agathis robusta, Alnus rhombifolia, Angophora costata, Araucaria bidwillii, Archontophoenix cunninghamiana, Baphia chrysophylla, Bauhinia forficata, Bauhinia variegata, Betula nigra, Brachychiton acerifolius, Brachychiton acerifolius ( Herman hybrid ), Brachychiton discolor, Brachychiton populneus, Brahea armata, Brahea brandegeei, Brahea edulis, Butia capitata, Calocedrus decurrens, Calodendrum capense, Caryota urens, Castanospermum australe, Casuarina cunninghamiana, Cedrus deodara, Cedrus libani, Celtis australis, Chamaerops humilis, Chionanthus retusus, Chorisia insignis, Chorisia speciosa, Cryptocarya rubra, Cryptomeria japonica, Cupaniopsis anacardioides, Cupressus glabra, Cupressus sp., Dalbergia sissoo, Dracaena draco, Ehretia anacua, Ehretia tinifolia, Eriobotrya deflexa, Eriobotrya japonica, Erythrina coralloides, Erythrina falcata, Erythrina humeana, Eucalyptus camaldulensis, Eucalyptus citriodora, Eucalyptus cladocalyx, Eucalyptus globulus, Eucalyptus robusta, Eucalyptus rudis, Eucalyptus viminalis, Ficus microcarpa nitida, Ficus racemosa, Ficus religiosa, Ficus sp., Fraxinus uhdei, Fraxinus velutina, Heteromeles arbutifolia, Jacaranda acutifolia, Jubaea chilensis, Juglans nigra, Lagerstroemia indica, Liquidambar formosana, Liriodendron tulipifera, Livistona australis, Livistona chinensis, Macadamia ternifolia, Magnolia grandiflora, Metasequoia glyptostroboides, Metrosideros excelsa, Myrcia cauliflora, Nyssa sylvatica, Phoenix canariensis, Phoenix dactylifera, Phoenix reclinata, Phoenix reclinata ( hybrid ), Phoenix roebelenii x rupicola, Phoenix rupicola, Phytolacca dioica, Pinus canariensis, Pinus edulis, Pinus halepensis, Pinus thunbergii, Pittosporum phillyraeoides, Pittosporum tenuifolium, Pittosporum undulatum, Podocarpus gracilior, Podocarpus totara, Psidium guajava, Quercus agrifolia, Quercus alba, Quercus cerris, Quercus coccinea, Quercus macrocarpa, Quercus palustris, Quercus rubra, Quercus suber, Quercus virginiana, Rhapidophyllum hystrix, Rhapis excelsa, Rhodosphaera rhodanthema, Rhopalostylis baueri, Rhus integrifolia, Sabal causiarum, Sabal sp., Salix babylonica, Schinus molle, Schinus polygamus, Sequoiadendron giganteum, Syagrus romanzoffiana, Tabebuia avellanedae, Taxodium distichum, Tipuana tipu, Toona ciliata, Trachycarpus fortunei, Trachycarpus wagnerianus, Tristania laurina, Trithrinax acanthocoma, Ulmus americana, Umbellularia californica, Washingtonia filifera, Washingtonia robusta, and Zelkova serrata.

To the west of the main house is a large California Black Walnut ( Juglans californica ) tree that was most likely planted by Juventino del Valle in the 1860s.

File: Coccothraustes rubra Catesby. jpg | Coccothraustes rubra ( probably Cardinalis cardinalis ) and Nux Juglans alba Virginiensis, 1754

File: Juglans flower female 20050526 064. jpg | Female flower

File: Juglans regia 2009 G2. jpg | Fruit

File: Juglans regia Echte Walnußfrucht 3. JPG | Seed

File: Juglans regia lastar. 078. jpg | Young tree

File: Juglans regia 04. JPG | Fertilized flowers

In California commercial production, the Hinds ' black walnut ( J. hindsii ) and the hybrid between J. hindsii and J. regia, Juglans x Paradox, are widely used as rootstocks for J. regia cultivars because of their resistance to Phytophthora and to a very limited degree, the oak root fungus.

Among the trees are American Sycamore ( Platanus occidentalis ), Bald Cypress ( Taxodium distichum ), Black Walnut ( Juglans nigra ), Pecan ( Carya illinoinensis ), Green Ash ( Fraxinus pennsylvanica ), Black Willow ( Salix nigra ), Chinkapin Oak ( Quercus muehlenbergii ), Lacey Oak ( Quercus laceyi ), Texas Red Oak ( Quercus buckleyi ), Juniper, Florida Basswood ( Tilia caroliniana ) and Bigtooth Maple ( Acer grandidentatum ) ( the latter of which was discovered far removed from any maple forest, and thus gave the area the name " lost maples ").

* Walnut ( Juglans ) is typically dark, hard, tight-grained wood prized for fine furniture and wood paneling.

* Juglans ( Walnut )

The suburban flora includes Japanese Yew ( Taxus cuspidata ), Amur Velvet, Manchurian Walnut ( Juglans mandschurica ), Ermann's Birch ( Betula ermannii ), Eleutherococcus, Lotus ( Nelumbo nucifera, a rare and very beautiful water-plant that can be found in several small lakes twelve kilometers from Arsenyev ).

), Common Walnut ( Juglans regia ), maple ( Acer spp.

Juglans cinerea, commonly known as Butternut or White Walnut, is a species of walnut native to the eastern United States and southeast Canada.

* Juglans – Walnut

* Juglans, Walnut

Some plants produce natural herbicides, such as the genus Juglans ( walnuts ), or the tree of heaven ; such action of natural herbicides, and other related chemical interactions, is called allelopathy.

Other tree associates of black oak include pignut hickory ( Carya glabra ), mockernut hickory ( C. tomentosa ), bitternut hickory ( C. cordiformis ), and shagbark hickory ( C. ovata ); American elm ( Ulmus americana ) and slippery elm ( U. rubra ); white ash ( Fraxinus americana ); black walnut ( Juglans nigra ) and butternut ( J. cinerea ); scarlet oak ( Quercus coccinea ), southern red oak ( Q. falcata ), and chinkapin oak ( Q. muehlenbergii ); red maple ( Acer rubrum ) and sugar maple ( A. saccharum ); black cherry ( Prunus serotina ); and blackgum ( Nyssa sylvatica ).

In 1792, William Bartram reported in his botanical book, Travels, a nut tree, Juglans exalata that some botanists today argue was the American pecan tree, but others argue was hickory, Carya ovata.

A second example is the black walnut tree ( Juglans nigra ), which secrete juglone, a chemical that harms or kills some species of neighboring plants.

Juglans nigra, the eastern black walnut, a species of flowering tree in the walnut family, Juglandaceae, is native to eastern North America.

This zone is habitat for many other important tree and large shrub species such as Abies pindrow, Betula utilis, Buxus rugulosa, Benthamidia capitata, Corylus ferox, Deutzia staminea, Euonymus tingens, Abies spectalbilis, Acanthopanax cissifolius, Acer campbellii, Acer pectinatum, Betula alnoides, Coriaria terminalis, Fraxinus macrantha, Dodecadenia grandiflora, Eurya cerasifolia, Hydrangea heteromala, Ilex dipyrena, Ligustrum spp., Litsea elongata, Juglans regia, Lichelia doltsopa, Myrsine capitallata, Neolitsea umbrosa, Philadelphus tomentosus, Osmanthus fragrans, Prunus cornuta, Rhododendron companulatum, Sorbus cuspidate, and Viburnum continifolium.

Juglans regia, the Persian walnut, English walnut, or especially in Great Britain, common walnut, is an Old World walnut tree species native to the region stretching from the Balkans eastward to the Himalayas and southwest China.

Juglans regia is a large, deciduous tree attaining heights of 25 – 35 m, and a trunk up to 2 m diameter, commonly with a short trunk and broad crown, though taller and narrower in dense forest competition.

* The Nut Tree Collection is a grove planted by Frances Bartlett which includes Carya illinoinensis ( pecans ), Juglans sp.

The two species hybridise readily ; the resulting hybrid Juglans x bixbyi ( otherwise known as J. cinera x ailantifolia or ' Buartnut ') is also resistant to canker and is likewise planted as a replacement for Butternuts.

), black cherry ( Prunus serotina ), cucumbertree ( Magnolia acuminata ), white ash ( Fraxinus americana ), American basswood ( Tilia americana ), black walnut ( Juglans nigra ), butternut ( J. cinerea ), and yellow-poplar ( Liriodendron tulipifera ).

Juglans is a plant genus of the family Juglandaceae, the seeds of which are known as walnuts.

The genus Juglans is divided into four sections.

* Juglans sect.

* Juglans sect.

Juglans.

* Juglans sect.

* Juglans sect.

Juglans is sister to Sect.

Juglans, Sect.

Hickory nuts ( Carya ) and walnuts ( Juglans ) in the Juglandaceae family grow within an outer husk ; these fruits are technically drupes or drupaceous nuts, and thus not true botanical nuts.

In the section Juglans, J. regia nut oil was found to contain from 10 % to 11 % linolenate, 6 % to 7 % palmitate, and a maximum concentration of linoleate ( 62 % to 68 %).

( 1974 ) " Juglans L .-Walnut ", in: Schopmeyer, C. S.

( 1998 ) " The walnut ( Juglans regia L .) forests of Kyrgyzstan and their importance as a genetic resource ", Commonwealth Forestry Review, 77 ( 4 ), p. 272 – 276

( 2002 ) " Некоторые Особенности Химического Состава И Биологической Активности Листового Опада Видов Рода Орех ( Juglans L .) При Интродукции В Среднем Поволжье ", Химия Растительного Сырья, 4, p. 43 – 47-in Russian

Image: Juglans intermedia vilmoriana JPG01a. jpg