Plantae > Tracheophyta > Magnoliopsida > Fabales > Fabaceae > Robinia > Robinia pseudoacacia

Robinia pseudoacacia (Post locust; yellow locust; Acacia; Acacia Bastarda; Black Locust; False Acacia; False-acacia)

Synonyms: Robinia pringlei; Robinia pseudacacia; Robinia pseudoacacia var. rectissima
Language: Armenian; Azerbaijani; Belorussian; Finnish; French; Georgian; German; Polish; Romanian; Russian; Swedish; Tadzhik; Ukrainian

Wikipedia Abstract

Robinia pseudoacacia, commonly known in its native territory as black locust, is a medium-sized deciduous tree native to the southeastern United States, but it has been widely planted and naturalized elsewhere in temperate North America, Europe, Southern Africa and Asia and is considered an invasive species in some areas. Another common name is false acacia, a literal translation of the specific name (pseudo meaning fake or false and acacia referring to the genus of plants with the same name.) It was introduced into Britain in 1636.
View Wikipedia Record: Robinia pseudoacacia


Invasive Species

Robinia pseudoacacia is a leguminous deciduous tree native to the southeastern United States that has been widely introduced to other parts of North America. It is commonly found in disturbed areas such as old fields, degraded woods, forest edges, and roadsides, but it poses the greatest threat to dry and sand prairies and oak savannas. R. pseudoacacia has been planted on reclaimed land to control erosion and has been used for ornamental purposes. It reproduces vigorously by root suckering and stump sprouting to form groves of trees interconnected by a common root system.
View ISSG Record: Robinia pseudoacacia


Height [4]  82 feet (25 m)
Width [4]  49 feet (15 m)
Air Quality Improvement [1]  None
Allergen Potential [1]  Medium
Carbon Capture [1]  Medium-High
Screening - Summer [3]  Moderate
Screening - Winter [3]  Porous
Shade Percentage [1]  80 %
Temperature Reduction [1]  Medium-Low
Wind Reduction [1]  Medium
Hardiness Zone Minimum [1]  USDA Zone: 4 Low Temperature: -30 F° (-34.4 C°) → -20 F° (-28.9 C°)
Hardiness Zone Maximum [1]  USDA Zone: 9 Low Temperature: 20 F° (-6.7 C°) → 30 F° (-1.1 C°)
Light Preference [7]  Mostly Sunny
Soil Acidity [7]  Moderate Acid
Soil Fertility [7]  Intermediate
Soil Moisture [7]  Mostly Dry
Water Use [1]  Moderate to Low
Bee Flower Color [2]  Blue-Green
Flower Color [3]  White
Foliage Color [3]  Green
Fruit Color [3]  Black
Flower Conspicuous [3]  Yes
Fruit Conspicuous [3]  Yes
Bloom Period [3]  Spring
Drought Tolerance [3]  High
Edible [4]  May be edible. See the Plants For A Future link below for details.
Fire Tolerance [3]  High
Flower Type [4]  Hermaphrodite
Frost Free Days [3]  4 months 20 days
Fruit/Seed Abundance [3]  Medium
Fruit/Seed Begin [3]  Spring
Fruit/Seed End [3]  Summer
Growth Form [3]  Multiple Stem
Growth Period [3]  Spring
Growth Rate [3]  Rapid
Hazards [4]  All parts of the plant (except the flowers) and especially the bark, should be considered to be toxic; The toxins are destroyed by heat;
Janka Hardness [5]  1710 lbf (776 kgf) Medium
Leaf Type [4]  Deciduous
Lifespan [6]  Perennial
Pollinators [4]  Bees
Propagation [3]  Bare Root, Container, Cutting, Seed
Root Depth [3]  36 inches (91 cm)
Scent [4]  The flowers are very fragrant with a vanilla-like scent;
Seed Spread Rate [3]  Moderate
Seed Vigor [3]  High
Seeds Per [3]  24000 / lb (52911 / kg)
Shape/Orientation [3]  Erect
Specific Gravity [8]  0.69
Structure [4]  Tree
Usage [4]  A drying oil is obtained from the seed; An essential oil is obtained from the flowers. Highly valued, it is used in perfumery; A yellow dye is obtained from the bark; Robinetin is a strong dyestuff yielding with different mordants different shades similar to those obtained with fisetin, quercetin, and myricetin; with aluminum mordant, it dyes cotton to a brown-orange shade; The bark contains tannin, but not in sufficient quantity for utilization; On a 10% moisture basis, the bark contains 7.2% tannin and the heartwood of young trees 5.7%; The bark is used to make paper and is a substitute for silk and wool; Trees sucker freely, especially if coppiced, and they can be used for stabilizing banks etc; Wood - close-grained, exceedingly hard, heavy, very strong, resists shock and is very durable in contact with the soil. It weighs 45lb per cubic foot and is used in shipbuilding and for making fence posts, treenails, floors etc; A very good fuel; The wood of Robinia pseudoacacia var. rectissima, the so called 'Long Island' or 'Shipmast' locust, has a greater resistance to decay and wood borers, outlasting other locust posts and stakes by 50 - 100%;
Vegetative Spread Rate [3]  Moderate
View Plants For A Future Record : Robinia pseudoacacia

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Acadia National Park II 35996 Maine, United States
Akyatan Lagoon 36324 Adana, Turkey      
Algonquin Provincial Park IV 1868802 Ontario, Canada
Allegheny Portage Railroad Nat'l Hist. Site National Historic Site III 1152 Pennsylvania, United States
Appomattox Court House National Historical Park V 1687 Virginia, United States
Arches National Park II 76539 Utah, United States
Assateague Island National Seashore II 8621 Maryland, United States
Belovezhskaya Pushcha Biosphere Reserve National Park II 218515 Belarus
Big South Fork National River and Recreation Area National Recreation Area V 120283 Kentucky, Tennessee, United States
Blue Ridge Parkway National Parkway V 73611 North Carolina, Virginia, United States
Bluestone National Scenic River National River and Wild and Scenic Riverway V 3517 West Virginia, United States
Booker T. Washington National Monument V 237 Virginia, United States
Burnham Beeches 946 England, United Kingdom  
Calvin College Ecosystem Preserve 90 Michigan, United States
Carmarthen Bay and Estuaries/ Bae Caerfyrddin ac Aberoedd 163340 Wales, United Kingdom
Carolinian-South Atlantic Biosphere Reserve 310228 North Carolina, South Carolina, Georgia, United States      
Catoctin Mountain Park National Park II 5994 Maryland, United States
Chattahoochee River National Recreation Area V 7622 Georgia, United States
Chesapeake & Ohio Canal National Hist. Park National Historical Park V 19586 Maryland, District of Columbia, United States
Chickamauga & Chattanooga Nat'l Military Park National Military Park V 8248 Georgia, Tennessee, United States
Colonial National Historic Park National Historical Park V 9316 Virginia, United States
Coweeta Hydrologic Laboratory LTER Site Long Term Ecological Research   North Carolina, United States
Cumberland Gap National Hist. Park National Historical Park V 24282 Kentucky, Tennessee, Virginia, United States
Death Valley National Park II 762125 California, Nevada, United States
Desert Biosphere Reserve 68236 Utah, United States
Dorset Heaths 14161 England, United Kingdom
Dorset Heaths (Purbeck and Wareham) and Studland Dunes 5491 England, United Kingdom
Essex Estuaries 114016 England, United Kingdom
Fort Donelson National Battlefield III 560 Tennessee, United States
Fort Necessity National Battlefield III 1019 Pennsylvania, United States
Fredericksburg and Spotsylvania Nat'l Military Park National Military Park V 10384 Virginia, United States
Friendship Hill National Historic Site III 697 Pennsylvania, United States
Gateway National Recreation Area V 1807 New Jersey, United States
Gauley River National Recreation Area V 10157 West Virginia, United States
George Washington Birthplace National Monument V 435 Virginia, United States
George Washington Memorial Parkway V   Virginia, United States
Gettysburg National Military Park V 3560 Pennsylvania, United States
Great Smoky Mountains National Park II 515454 North Carolina, Tennessee, United States
Great Swamp National Wildlife Refuge VI 3161 New Jersey, United States
Hackpen Hill 89 England, United Kingdom  
Harpers Ferry National Historical Park VI 715 West Virginia, United States
Herbert Hoover National Historic Site   Iowa, United States
Hobcaw Barony (North Inlet) National Estuarine Research Reserve 7585 South Carolina, United States
Hopewell Furnace National Historic Site III 861 Pennsylvania, United States
Humber Estuary 90582 England, United Kingdom
Indiana Dunes National Lakeshore II 8272 Indiana, United States
Johnstown Flood National Memorial VI 175 Pennsylvania, United States
Kennesaw Mountain National Battlefield Park III 2897 Georgia, United States
Khopersky Zapovednik Ia 47103 Russia  
Kouchibouguac National Park II 59161 New Brunswick, Canada
Little River National Wildlife Refuge   Oklahoma, United States
Luberon Regional Nature Park V 406572 France  
Lundy 7573 England, United Kingdom  
Mammoth Cave Area Biosphere Reserve (Natn'l Park) National Park II 51235 Kentucky, United States
Manassas National Battlefield Park III 5132 Virginia, United States
Mojave and Colorado Deserts Biosphere Reserve 5901 California, United States  
Mount Arrowsmith Biosphere Reserve 293047 British Columbia, Canada  
Mount Mitchell State Park   North Carolina, United States
New Jersey Pinelands Biosphere Reserve   New Jersey, United States  
New River Gorge National River National River and Wild and Scenic Riverway V 55591 West Virginia, United States
Niagara Escarpment Biosphere Reserve 470167 Ontario, Canada  
North Norfolk Coast 7926 England, United Kingdom  
North Somerset and Mendip Bats 1387 England, United Kingdom
Obed Wild and Scenic River National River and Wild and Scenic Riverway V 5268 Tennessee, United States
Oconee National Forest Botanical Reserve 306 Georgia, United States  
Palava Protected Landscape Area V   Czech Republic  
Parco Del Somma-Vesuvio e Miglio D'Oro National Park II 33648 Italy
Pen Llyn a`r Sarnau/ Lleyn Peninsula and the Sarnau 360832 Wales, United Kingdom
Petersburg National Battlefield III 3338 Virginia, United States
Point Pelee National Park II 5764 Ontario, Canada
Prince William Forest Park 19378 District of Columbia, United States
Reserva de la Biosfera de Urdaibai Biosphere Reserve V 1777 Spain  
Richmond National Battlefield Park III 1517 Virginia, United States
Rondeau Provincial Park II 5035 Ontario, Canada
Saint Lawrence Islands National Park II   Ontario, Canada
San Juan Island National Historical Park III 1674 Washington, United States
Sefton Coast 11278 England, United Kingdom
Severn Estuary/ Môr Hafren 182155 England/Wales, United Kingdom
Shenandoah National Park II 108221 Virginia, United States
Shiloh National Military Park III 4061 Tennessee, United States
Solent Maritime 27985 England, United Kingdom
South Wight Maritime 49082 England, United Kingdom
Southern Appalachian Biosphere Reserve 37548505 North Carolina, Tennessee, United States  
Tennessee River Gorge   Tennessee, United States
The Broads 14554 England, United Kingdom  
The New Forest 72309 England, United Kingdom
The Wash and North Norfolk Coast 266284 England, United Kingdom
Thursley, Ash, Pirbright and Chobham 12696 England, United Kingdom
Tsentral'no-Chernozemny Biosphere Reserve Ia 13064 Kursk, Russia
Upper Miss. River Nat'l Wildlife Refuge National Wildlife Refuge VI 25823 Illinois, Iowa, Wisconsin, United States
Valley Forge National Historical Park VI 3509 Pennsylvania, United States
Voronezhskiy Biosphere Reserve 95835 Russia  
Western Michigan University's Asylum Lake Preserve 274 Michigan, United States
Wormley Hoddesdonpark Woods 829 England, United Kingdom
Zion National Park II 135667 Utah, United States



Anticarsia gemmatalis (velvetbean caterpillar)[9]
Apis mellifera (honey bee)[10]
Bombus fervidus (Golden northern bumble bee)[10]
Bruchidius cisti[11]
Byturus tomentosus <Unverified Name>[11]
Cacoecimorpha pronubana (Carnation Tortrix)[11]
Camarosporidiella elongata[9]
Celastrina argiolus (Holly Blue Butterfly)[9]
Cervus elaphus hanglu (Kashmir stag)[12]
Chaetosiphon minus minus[11]
Chionaspis gleditsiae (honey locust chionaspis)[13]
Clavaspis ulmi (elm Aspidiotus)[13]
Clonostachys rosea[9]
Colias electo (African Clouded Yellow)[9]
Colias philodice (clouded sulphur)[9]
Columba livia (Rock Pigeon)[9]
Cytosporina ludibunda[9]
Diaporthe oncostoma[9]
Diaspidiotus africanus (grey scale)[13]
Diaspidiotus ancylus (Howard scale)[13]
Diaspidiotus juglansregiae (English walnut scale)[13]
Diaspidiotus leguminosum[13]
Diaspidiotus perniciosus (California scale)[13]
Drosicha turkestanica[13]
Epargyreus clarus (silverspotted skipper)[14]
Epicallima formosella <Unverified Name>[11]
Erynnis icelus (Dreamy Dusky Wing)[9]
Erynnis zarucco (Zarucco Duskywing)[9]
Eurema hecabe (Common grass yellow)[9]
Ganoderma australe (Southern Bracket)[9]
Ganoderma lucidum[9]
Heliococcus bohemicus (Bohemian mealybug)[13]
Hemiberlesia lataniae (latania scale)[13]
Icerya purchasi (cottony cushion scale)[13]
Lampides boeticus (bean butterfly)[9]
Lecanodiaspis prosopidis[13]
Lepidosaphes ulmi (apple oystershell scale)[9]
Maconellicoccus hirsutus (pink hibiscus mealybug)[13]
Meleagris gallopavo (Wild Turkey)[10]
Meripilus giganteus[9]
Microdiplodia robiniae[9]
Myocastor coypus (nutria)[15]
Nectria pallidula[9]
Nematus tibialis <Unverified Name>[11]
Neptis philyra[9]
Neptis sappho (Pallas' Sailer)[9]
Odocoileus virginianus (white-tailed deer)[10]
Paraputo porosus[13]
Parlatoreopsis longispina (Asiatic pomegranate scale)[13]
Parlatoria oleae (olive parlatoria scale)[13]
Parthenolecanium pruinosum (frosted scale)[13]
Perenniporia fraxinea[9]
Phomopsis oncostoma[9]
Phomopsis petiolorum[9]
Prosopophora robiniae[13]
Pseudaulacaspis pentagona (mulberry scale)[13]
Rigidoporus ulmarius[9]
Sylvilagus floridanus (Eastern Cottontail)[10]
Thrips obscuratus <Unverified Name>[16]
Vasates allotrichus <Unverified Name>[11]
Vasates robiniae <Unverified Name>[11]
Xyleborinus saxeseni[16]
Zale unilineata[9]
Zenaida macroura (Mourning Dove)[10]
Archilochus colubris (Ruby-throated Hummingbird)[10]
Colias philodice[10]
Colinus virginianus (Northern Bobwhite)[10]
Diapheromera femorata (Common American Walkingstick)[10]
Sciurus carolinensis (eastern gray squirrel)[10]


Pollinated by 
Anoplius illinoensis[9]
Apis mellifera (honey bee)[17]
Archilochus colubris (Ruby-throated Hummingbird)[10]
Asclera puncticollis[9]
Bombias auricomus <Unverified Name>[17]
Bombias scutellaris <Unverified Name>[17]
Bombias separatus <Unverified Name>[17]
Bombus americanorum[17]
Bombus impatiens[17]
Dasiops latifrons[9]
Deilephila lineata <Unverified Name>[17]
Iphiclides ajax <Unverified Name>[17]
Leptometopa latipes[9]
Lispe albitarsis[9]
Lygaeus turcicus[9]
Nomada denticulata[9]
Phormia regina (Black blowfly)[9]
Spallanzania hesperidarum[9]
Tetralonia dilecta <Unverified Name>[17]
Triepeolus donatus[9]


Parasitized by 
Agrilus politus[9]
Cyclocybe cylindracea (Poplar Fieldcap)[9]
Ganoderma australe[9]
Ganoderma lucidum[9]
Perenniporia fraxinea[9]
Viscum album (European mistletoe)[9]
Shelter for 
Didelphis virginiana (Virginia Opossum)[10]
Dolichovespula maculata (baldfaced hornet)[10]
Dryocopus pileatus (Pileated Woodpecker)[10]
Myiarchus crinitus (Great Crested Flycatcher)[10]
Picoides pubescens (Downy Woodpecker)[10]
Poecile carolinensis (Carolina Chickadee)[10]
Procyon lotor (Raccoon)[10]
Sialia sialis (Eastern Bluebird)[10]
Sitta carolinensis (White-breasted Nuthatch)[10]
Archilochus colubris (Ruby-throated Hummingbird)[10]
Colias philodice[10]
Colinus virginianus (Northern Bobwhite)[10]
Diapheromera femorata (Common American Walkingstick)[10]
Sciurus carolinensis (eastern gray squirrel)[10]

Institutions (Zoos, etc.)

Institution Infraspecies / Breed 
Svalbard Global Seed Vault

Range Map

Afghanistan (introduced); Albania (introduced); Armenia (introduced); Australia (introduced); Austria-F.E. (introduced); Azerbaijan (introduced); Balearic Is (introduced); Belarus (introduced); Belgium-F.E. (introduced); Bulgaria (introduced); Canada (native); China (introduced); Corsica (introduced); Czechoslovakia (introduced); Estonia (introduced); France-F.E. (introduced); Germany (introduced); Great Britain (introduced); Greece (introduced); Gruzia (introduced); Hungary (introduced); India (introduced); India-ISO (introduced); Iran (introduced); Iraq (introduced); Israel-Jordan (introduced); Italy-F.E. (introduced); Japan (introduced); Kazakhstan (introduced); Kirgizstan (introduced); Latvia (introduced); Lithuania (introduced); Malta (introduced); Moldova (introduced); Netherlands (introduced); New Zealand(North) (introduced); New Zealand(South) (introduced); Pakistan (introduced); Reunion (introduced); Romania (introduced); Russia in Asia (introduced); Russia in Europe (introduced); Sardegna (introduced); Sicilia (native); Spain-F.E. (introduced); Switzerland (introduced); Tadzhikistan (introduced); Turkey in Asia (introduced); Turkey in Europe (introduced); Turkmenistan (introduced); Ukraine (introduced); United States (native); Uzbekistan (introduced); Western Michigan University’s Asylum Lake; Yugoslavia (introduced);



Attributes / relations provided by
1i-Tree Species v. 4.0, developed by the USDA Forest Service's Northern Research Station and SUNY-ESF using the Horticopia, Inc. plant database.
2Arnold SEJ, Faruq S, Savolainen V, McOwan PW, Chittka L, 2010 FReD: The Floral Reflectance Database — A Web Portal for Analyses of Flower Colour. PLoS ONE 5(12): e14287.
3USDA Plants Database, U. S. Department of Agriculture
4Plants For A Future licensed under a Creative Commons License
5Wood Janka Hardness Scale/Chart J W Morlan's Unique Wood Gifts
6PLANTATT - Attributes of British and Irish Plants: Status, Size, Life History, Geography and Habitats, M. O. Hill, C. D. Preston & D. B. Roy, Biological Records Centre, NERC Centre for Ecology and Hydrology (2004)
7ECOFACT 2a Technical Annex - Ellenberg’s indicator values for British Plants, M O Hill, J O Mountford, D B Roy & R G H Bunce (1999)
8Forest Inventory and Analysis DB version 5.1, May 4, 2013, U.S. Forest Service
9Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
10Study of Northern Virginia Ecology
11Biological Records Centre Database of Insects and their Food Plants
12Diets of Hangul Deer Cervus elaphus hanglu (Cetartiodactyla: Cervidae) in Dachigam National Park, Kashmir, India, G. Mustafa Shah, Ulfat Jan, Bilal A. Bhat & Fayaz A. Ahangar, Journal of Threatened Taxa | July 2009 | 1(7): 398-400
13Ben-Dov, Y., Miller, D.R. & Gibson, G.A.P. ScaleNet 4 November 2009
14Butterflies of Canada, Canadian Biodiversity Information Facility
15Food habits of the coypu, Myocastor coypus, and its impact on aquatic vegetation in a freshwater habitat of NW Italy, Claudio PRIGIONI, Alessandro BALESTRIERI and Luigi REMONTI, Folia Zool. – 54(3): 269–277 (2005)
16New Zealand Institute for Plant & Food Research Plant-SyNZ™ database
17Robertson, C. Flowers and insects lists of visitors of four hundred and fifty three flowers. 1929. The Science Press Printing Company Lancaster, PA.
Images provided by Google Image Search
Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access