Robinia pseudoacacia. Robinia pseudoacacia, commonly called black locust, is medium sized, suckering, deciduous tree that typically grows to 30-50’ (less frequently to 80’) tall. This is a larval host plant for several butterflies. Leaves similar to the species type but bright yellow in spring then greenish-yellow in summer. Where is this species invasive in the US. The compound leaves consist of 9 to 19 elliptical, leaf segments that are 2 – 4.5 cm in size. About Purple Robe Trees. Leaf: Alternate, pinnately compound, with 7 to 19 leaflets, 8 to 14 inches long. This means that when the black locust has been introduced to a new environment, it tends to compete with native species and take over in … Depression, weakness, dilated pupils, vomiting, bloody diarrhea, weak pulse, coldness of arms and legs, paleness, and shock. This species is also commonly called common locust, yellow locust, white locust, green locust, pea flower locust and false acacia.Genus name honors Jean Robin (1550-1629), of Paris, gardener to Henri IV and Louis XIII of France, who received new plants from Canada.Specific epithet means false acacia. It grows quickly and can reach heights between 40 and 100 feet. I first came across this specimen on a trip to London in late spring, close to two decades ago. If ingested, it may cause death in humans and livestock and pets. Robinia hispida × Robinia pseudoacacia → Robinia × margarettae Ashe is a very rare locust hyrid known from MA. 2) Origin: native to North America Uses: reclamation plant; shade tree; no proven urban tolerance Availability: somewhat available, may have to go out Latin: Robinia pseudoacacia. It is susceptible to locust borer (often fatal) and locust leaf miner (browns foliage). Compound (Pinnately , Bipinnately, Palmately). Black locust is a deciduous tree that, while native to parts of the United States, has spread to and become invasive in other parts of the country. Robinia leafs out late and keeps its leaves long into the autumn. Bees are attracted to the flowers. Mature Height: 40-80 ft. Its trunk can grow to 3-4 feet in diameter. The flowers are followed by smooth, flat, purple-brown seed pods (to 4-5” long). The Tree is a deciduous tree, it will be up to 25 m (82 ft) high. Insects, Diseases, or Other Plant Problems:  It is susceptible to locust borer (often fatal) and locust leaf miner (browns foliage). They grow upright in forests but develop an open growth form in more open areas. The Garden wouldn't be the Garden without our Members, Donors and Volunteers. Likes full sun and tolerant of most soils. These are followed by flat, reddish brown, leathery pods with a winged edge that often stay on the tree throughout the entire winter. Possible disease problems include canker, powdery mildew, leaf spots, wood rots and verticillium wilt. Robinia pseudoacacia ‘Frisia’: ‘Frisia’ Black Locust3 should be saved for the toughest sites. The shrubs to small trees (1–10 m tall) are hispid in the inflorescence and may be hispid on the petioles. black locust Fabaceae Robinia pseudoacacia L. symbol: ROPS. The buds and catkins are eaten by birds.  It provides an excellent leaf cover for birds in wetland sites.   Bees are attracted to its flowers. Other insect problems include caterpillars, weevils, scale and whiteflies. Also bothered by carpenterworm, locust leaf miner, and scales. There are 3 flights in the north and 4 to 5 flights in the south (but it rarely uses this plant as a host in North Carolina). Robinia pseudoacacia is a deciduous Tree growing to 25 m (82ft) by 15 m (49ft) at a fast rate. Small branches of the Black locust fall easily during storms. Leaf C:P and N:P ratios were higher for Robinia pseudoacacia than for understory plants.. N:P ratios indicate a tight coupling between soil and plant. The Black Locust is botanically called Robinia pseudoacacia. The bark is gray or light brown, thick, fibrous, heavily ridged, and furrowed. Description Robinia pseudoacacia 'Unifoliola' Closed, broad pyramidal tree 15 - 18 m high. Although originally native to the Allegheny Mountains, it has escaped gardens and naturalized over time to cover much of the United States and southern Canada plus parts of Europe, Asia and South America. The paired, stout thorns at each node are unlike any other tree in our area except for Zanthoxylum americanum, which has pointed leaflets and is likely to be recognized as a shrub. It is considered to be a good selection for difficult areas where other trees will not grow well. Robinia pseudoacacia, commonly known as the black locust, is a prickly tree within the subfamily Faboideae of the pea family called Fabaceae and is considered to be a legume with flattened pea pods several inches long. The autumn colour is yellow. It is noted for its attractive compound leaves and pendant racemes of pea-like flowers. However, in recent years, this particular cultivar, 'Frisia', has suffered from a damaging dieback problem, sometimes causing the ultimate loss of the tree. Avoid pruning in spring when it tends to bleed.Species trees spread by self-seeding and root suckers. The Black Locust is a memeber of the Pea Family. The 6- to 14-inch-long, dull, yellow leaves, made up of multiple leaflets, are some of the last to appear in spring and often drop early in the autumn, just barely fading to a sickly yellow/green before dropping. The irregularly shaped leaves hang on a long leaf stem and consist of a strikingly large top leaf (to approx. The yellow foliage lasts only for a short period in the spring in the south. Flower: Perfect, showy and fragrant, white, 1 inch long and pea-like, borne in long (5 inches) hanging clusters, appear in mid to late spring. Cooperative Extension prohibits discrimination and harassment on the basis of race, color, national origin, age, sex (including pregnancy), disability, religion, sexual orientation, gender identity, and veteran status. Leaf miner is a universal problem on the species. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees. Seasons of Interest: Leaves: Bloom: Spring Fruit/Seed/Nut: Fall Numerous cultivars have been bred in Europe, including some elegant leaf and flower colour forms, and a number of hybrids exist. Scientific name: Robinia pseudoacacia Pronunciation: roe-BIN-nee-uh soo-doe-uh-KAY-shuh Common name(s): Black Locust, Common Locust Family: Leguminosae USDA hardiness zones: 4 through 8 (Fig. The leaves are alternate, pinnately compound with 7 to 21 leaflets. Other insect problems include caterpillars, weevils, scale and whiteflies. Robinia pseudoacacia 'Bessoniana' – Robinia pseudoacacia 'Bessoniana' A decorative selection with a straight trunk and a broad, oval crown later becoming broad ovoid. This attractive deciduous tree provides soft filtered shade with its open habit and pinnate leaf shape. Promptly remove suckers as they appear unless naturalization is desired. I was taken aback by its delicate, lime colored leaves in contrast with all of the green plant material around the base of its trunk. Twisty Baby® black locust (Robinia pseudoacacia 'Lace Lady'): Smaller size tree (20 feet high by 20 feet wide) with contorted limbs. Invasive Species: Robinia pseudoacacia, Black Locust. Zarucco Duskywing (Erynnis zarucco) has three broods in the deep south from March-October, appearing as early as January in Florida. At night the leaflets droop and the leaf seems to be folding up. Robinia pseudoacacia has alternate compound leaves with blunt entire leaflets. Flower and Leaves (Warren County, NC)-Spring, Flower close-up (Warren County, NC)-Spring, Fencing, mine timbers, and landscaping ties, found in all 48 states of the contiguous US. Leaf: odd-pinnate, 20 - 30 cm, 9 - 19 leaf segments, 1.5 - 4.5 cm, green, feathered leaf On better sites it may reach 30 m tall and 122 cm or more in diameter. Robinia pseudoacacia 'Frisia'. Deciduous tree, to 40 ft (12 m) high and a spread of 25 ft (8 m), oval with upright branches, young shoots have wine-red prickles (thorns). A mature Black Locust tree : Description. Robinia or black locust Robinia, Robinia pseudoacacia, does not produce suckers in all circumstances and some big, old specimens have never caused problems. It is a very upright tree with a straight trunk and narrow crown that grows scraggly with age. Leaves:       Bloom:   Spring    Fruit/Seed/Nut:  Fall. Fun Facts. Leaves turn uneventful yellow in fall. These display from July to November. 15 cm) and 1 to 3 pairs of small side leaves. Grow in average, dry to medium, well-drained soils in full sun. Numerous cultivars have been bred in Europe, including some elegant leaf and flower colour forms, and a … 'Frisia' leafs … Some of its leaves yellow and fall off during times of drought. Robinia pseudoacacia can be pruned and kept at shrub size by cutting them to the ground every 2-3 years. Flowers are followed by smooth, flat, purple-brown seed pods (to 4-5” long). It has pinnate dark blue-green leaves, with each leaf having up to 23 lance-shaped to ovate leaflets. When Robinia 'Lace Lady' attracted my attention, at the Monrovia display garden in Oregon, its contorted branches and leaves were curling every which way.. However, if the roots are disturbed or damaged, vigorous suckering starts. Exceptionally, it may grow up to 52 metres (171 ft) tall and 1.6 metres (5.2 ft) diameter in very old trees. It also will grow in suckering thickets. Robinia pseudoacacia, commonly called black locust, is medium sized, suckering, deciduous tree that typically grows to 30-50’ (less frequently to 80’) tall. Leaves turn uneventful yellow in fall. Black Locust is easily transplanted and grown. Not for general use in urban areas due to borer problems unless located on … N.C. In spring and early summer, fragrant, pea-like white flowers, borne in long (5 inch) hanging clusters mature. Fixes nitrogen. 1×2. Twisty baby, contortionist, leaves doing the twist—this tree has all the moves. Botanical name: Robinia pseudoacacia Family: Fabaceae (pea) Click on images of Black Locust to enlarge. It’s an extremely fast growing tree – 4 to 6 feet per year. The leaves are imparipinnate and the flowers are white. It is in flower in June, and the seeds ripen from November to March. Black locust is generally considered to be a very easy-to-grow tree. The crown is significantly more closed in structure than that of the species. Compact, pendulous clusters of creamy white, sometimes slightly pink, aromatic flowers appear in June. 1. Black locust primarily invades disturbed habitats, degraded woods, thickets and old fields, where it crowds out native vegetation and forms single species stands. Robinia pseudoacacia, commonly called black locust, is medium sized, suckering, deciduous tree that typically grows to 30-50’ (less frequently to 80’) tall. In spring its ovate leaves are bluish green on top followed by chartreuse yellow foliage that gets more yellow and brighter right up to autumn. Robinia pseudoacacia 'Frisia' is a popular yellow-leaved tree, widely grown in many gardens and public spaces. It is hardy to zone (UK) 3. The wood from this native is naturally rot resistant and often used to make fence posts and rails. At its best, it will grow as a broadly columnar single trunk tree with a narrow oblong crown. Soil / Climate: It is native to South Eastern United States. Branches are usually armed with short paired spines (to 1.25” long). Robinia pseudoacacia is cultivated widely as an ornamental. This tree is not generally recommended for prime landscape areas because of its suckering habit and its susceptibility to borers. Robinia pseudoacacia can be pruned and kept at shrub size by cutting them to the ground every 2-3 years. Fire Risk: This plant has a low flammability rating. Clouded Sulphur (Colias philodice) larvae appear from May to October in the north and from March to November in the south. 7 BENEFITS of Robinia pseudoacacia ‘Frisia’. 2. Fragrant wisteria-like white flowers in pendant racemes (to 8” long) bloom in late spring. It is generally a crooked tree and often has a tendency to fork. Black locust reaches a typical height of 40–100 feet (12–30 m) with a diameter of 2–4 feet (0.61–1.22 m). Possible disease problems include canker, powdery mildew, leaf spots, wood rots and verticillium wilt.Species trees are sometimes considered to be somewhat weedy. The inflorescences contain 6–10 flowers with pink corollas. Heat and drought tolerant. It is also a legume, fixes its own nitrogen and is moderately salt tolerant. Fire Risk: This plant has a low flammability rating. Top of page R. pseudoacacia is a medium-sized tree, generally 12-18 m tall and 30-76 cm in stem diameter, with an open, irregular crown. ... Thorns can be found at the base of the leaf stalk. Such was the case with Robinia pseudoacacia ‘Frisia’ and ‘Purple Robe’. Trees grow from 40 to 100 ft. (12 to 30 m) in height. Zones: 3-9. Golden Robinia. fire in the landscape. Silver-Spotted Skipper (Epargyreus clarus) appears from May-September with three-four broods in the deep south, two broods in the east, and one brood in the north and west. Tolerates a wide range of soils including sandy or nearly barren ones. Fragrant wisteria-like white flowers in pendant racemes (to 8” long) bloom from April to June. It thrives in many difficult growing conditions. Robinia pseudoacacia T. Sitzia, A. Cierjacks, D. de Rigo, G. Caudullo Robinia pseudoacacia L., commonly known as black locust, is a tree native to North America and is one of the most important and widespread broadleaved alien trees in Europe. Can sucker from its roots. Robinia pseudoacacia afforestation improved soil and plant community characteristics.. Robinia pseudoacacia ‘Frisia’ problems. Black locust (Robinia pseudoacacia) is native to the U.S., but not to the Upper Midwest.It is currently spreading into states like Minnesota that are outside of its historical range. Leaflets are oval, one inch long, with entire margins. Leaves resemble sprigs of grapes; green above and paler below. The tree produces a 2- to 4-inch flattened legume which contains 4 to 8 red-brown seeds. Species trees are sometimes considered to be somewhat weedy. It is a vigorous grower with a vertical trunk and a squat, irregular crown. The leaf of the Black locust is noted for its attractive alternate, compound leaves and pendant racemes of pea-like flowers. It is a medium-sized, deciduous, fast-growing thorny tree with high suckering capacity. form a strategic partnership called N.C. Its branches are usually armed with short paired spines (to 1.25” long). Trees send out long underground root suckers that not only become a maintenance problem but also can disrupt nearby gardening areas. Trees along the highways in the south can be https://www.fs.fed.us/database/feis/plants/tree/robpse/all.html The leaves have an orange-yellow colour when they emerge, turn greenish yellow in summer, and deep golden yellow in the autumn. Robinia pseudoacacia‘Frisia’ -- ‘Frisia’ Black Locust Page 4 Pests Locust borer is a serious pest although borer-resistant clones are now being developed. It is a moderate grower with striking lime green foliage which intensifies into a vibrant, golden colour in autumn. The dark blue-green compound leaves with a contrasting lighter underside give this tree a beautiful appearance in the wind and contribute to its grace. Black Locust is a deciduous tree that may grow 50 to 70 feet tall. Read our Commitment to Diversity | Read our Privacy Statement. Cooperative Extension, which staffs local offices in all 100 counties and with the Eastern Band of Cherokee Indians. Purple robe black locust (Robinia pseudoacacia 'Purple Robe'): Flowers are deep rosy-purple; new foliage emerges tinged with purple and matures to a bronze-green color. Native Range: Eastern and central United States, Suggested Use: Flowering Tree, Naturalize, Tolerate: Deer, Drought, Clay Soil, Black Walnut, Air Pollution. Pinnate dark blue-green leaves, with each leaf having up to 23 lance-shaped to ovate leaflets. Trees send out long underground root suckers that not only become a maintenance problem but also can disrupt nearby gardening areas. Although originally native to the Allegheny Mountains, it has escaped gardens and naturalized over time to cover much of the United States and southern Canada plus parts of Europe, Asia and South America. Robinia pseudoacacia is an invasive species! This plant is listed as a noxious weed in one or more Midwestern states outside Missouri and should not be moved or grown under conditions that would involve danger of dissemination. They are pea-like and very fragrant. "Purple Robe" black locust (Robinia pseudoacacia "Purple Robe") can grow in some of the most difficult conditions and on a variety of sites. Native; Deciduous; Medium size tree growing up to 75-95′ in height and 25-30′ wide canopy It develops shoots from roots. Robin, a phytotoxin; robitin, a glycoside; robinine, an alkaloid. The tree likes Sun to slight shade at the location and the soil should be sandy to strong loamy . Tolerates some light shade, but avoid shady locations. Other common names: yellow locust. Good drought tolerance. When designing a new garden, this can be a big plus. This is a good plant for difficult sites, transplants well, and tends to reseed. Full sun (6 or more hours of direct sunlight a day), Partial Shade (Direct sunlight only part of the day, 2-6 hours), 3b, 3a, 4a, 4b, 5b, 5a, 6b, 6a, 7b, 7a, 8b, 8a. NC State University and N.C. 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