"Purple Robe" black locust (Robinia pseudoacacia "Purple Robe") can grow in some of the most difficult conditions and on a variety of sites. Also bothered by carpenterworm, locust leaf miner, and scales. Flowers are followed by smooth, flat, purple-brown seed pods (to 4-5” long). 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. 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. 1. Compact, pendulous clusters of creamy white, sometimes slightly pink, aromatic flowers appear in June. 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. Trees grow from 40 to 100 ft. (12 to 30 m) in height. Leaflets are oval, one inch long, with entire margins. 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). On better sites it may reach 30 m tall and 122 cm or more in diameter. Tolerates a wide range of soils including sandy or nearly barren ones. Not for general use in urban areas due to borer problems unless located on … 2) Origin: native to North America Uses: reclamation plant; shade tree; no proven urban tolerance Availability: somewhat available, may have to go out Trees along the highways in the south can be Latin: Robinia pseudoacacia. Invasive Species: Robinia pseudoacacia, Black Locust. It is also a legume, fixes its own nitrogen and is moderately salt tolerant. Robinia pseudoacacia‘Frisia’ -- ‘Frisia’ Black Locust Page 4 Pests Locust borer is a serious pest although borer-resistant clones are now being developed. Fragrant wisteria-like white flowers in pendant racemes (to 8” long) bloom in late spring. Leaves similar to the species type but bright yellow in spring then greenish-yellow in summer. The inflorescences contain 6–10 flowers with pink corollas. It has pinnate dark blue-green leaves, with each leaf having up to 23 lance-shaped to ovate leaflets. Zones: 3-9. Branches are usually armed with short paired spines (to 1.25” long). The tree likes Sun to slight shade at the location and the soil should be sandy to strong loamy . Compound (Pinnately , Bipinnately, Palmately). Where is this species invasive in the US. At night the leaflets droop and the leaf seems to be folding up. Robinia pseudoacacia has alternate compound leaves with blunt entire leaflets. black locust Fabaceae Robinia pseudoacacia L. symbol: ROPS. Cooperative Extension, which staffs local offices in all 100 counties and with the Eastern Band of Cherokee Indians. Robinia pseudoacacia can be pruned and kept at shrub size by cutting them to the ground every 2-3 years. The Tree is a deciduous tree, it will be up to 25 m (82 ft) high. Depression, weakness, dilated pupils, vomiting, bloody diarrhea, weak pulse, coldness of arms and legs, paleness, and shock. The leaves have an orange-yellow colour when they emerge, turn greenish yellow in summer, and deep golden yellow in the autumn. Fun Facts. Best performance is in moist, organically rich loams. However, in recent years, this particular cultivar, 'Frisia', has suffered from a damaging dieback problem, sometimes causing the ultimate loss of the tree. If ingested, it may cause death in humans and livestock and pets. Robinia pseudoacacia ‘Frisia’: ‘Frisia’ Black Locust3 should be saved for the toughest sites. Robinia pseudoacacia 'Bessoniana' – Robinia pseudoacacia 'Bessoniana' A decorative selection with a straight trunk and a broad, oval crown later becoming broad ovoid. Insects, Diseases, or Other Plant Problems:  It is susceptible to locust borer (often fatal) and locust leaf miner (browns foliage). 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). 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. 1×2. 'Frisia' leafs … The bark is gray or light brown, thick, fibrous, heavily ridged, and furrowed. Black locust is generally considered to be a very easy-to-grow tree. The yellow foliage lasts only for a short period in the spring in the south. They are pea-like and very fragrant. Botanical name: Robinia pseudoacacia Family: Fabaceae (pea) Click on images of Black Locust to enlarge. When designing a new garden, this can be a big plus. It is a moderate grower with striking lime green foliage which intensifies into a vibrant, golden colour in autumn. Robinia pseudoacacia 'Frisia' is a popular yellow-leaved tree, widely grown in many gardens and public spaces. The compound leaves consist of 9 to 19 elliptical, leaf segments that are 2 – 4.5 cm in size. Robinia pseudoacacia, commonly called black locust, is medium sized, suckering, deciduous tree that typically grows to 30-50’ (less frequently to 80’) tall. Fixes nitrogen. It is a very upright tree with a straight trunk and narrow crown that grows scraggly with age. 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. It is in flower in June, and the seeds ripen from November to March. The Black Locust is botanically called Robinia pseudoacacia. Small branches of the Black locust fall easily during storms. The leaf of the Black locust is noted for its attractive alternate, compound leaves and pendant racemes of pea-like flowers. Read our Commitment to Diversity | Read our Privacy Statement. Other insect problems include caterpillars, weevils, scale and whiteflies. Native Range: Eastern and central United States, Suggested Use: Flowering Tree, Naturalize, Tolerate: Deer, Drought, Clay Soil, Black Walnut, Air Pollution. It is noted for its attractive compound leaves and pendant racemes of pea-like flowers. Exceptionally, it may grow up to 52 metres (171 ft) tall and 1.6 metres (5.2 ft) diameter in very old trees. 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). Twisty baby, contortionist, leaves doing the twist—this tree has all the moves. 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. 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. 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. Leaves resemble sprigs of grapes; green above and paler below. However, if the roots are disturbed or damaged, vigorous suckering starts. ... Thorns can be found at the base of the leaf stalk. Robinia pseudoacacia is cultivated widely as an ornamental. Possible disease problems include canker, powdery mildew, leaf spots, wood rots and verticillium wilt.Species trees are sometimes considered to be somewhat weedy. The autumn colour is yellow. Golden Robinia. 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, 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. About Purple Robe Trees. Some of its leaves yellow and fall off during times of drought. Leaves turn uneventful yellow in fall. It grows quickly and can reach heights between 40 and 100 feet. They grow upright in forests but develop an open growth form in more open areas. Numerous cultivars have been bred in Europe, including some elegant leaf and flower colour forms, and a number of hybrids exist. The wood from this native is naturally rot resistant and often used to make fence posts and rails. 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. Other common names: yellow locust. 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. Fragrant wisteria-like white flowers in pendant racemes (to 8” long) bloom from April to June. NC State University and N.C. A&T State University work in tandem, along with federal, state and local governments, to 2. This tree is not generally recommended for prime landscape areas because of its suckering habit and its susceptibility to borers. A mature Black Locust tree : Description. Robinia pseudoacacia, commonly called black locust, is medium sized, suckering, deciduous tree that typically grows to 30-50’ (less frequently to 80’) tall. Pinnate dark blue-green leaves, with each leaf having up to 23 lance-shaped to ovate leaflets. Leaf: odd-pinnate, 20 - 30 cm, 9 - 19 leaf segments, 1.5 - 4.5 cm, green, feathered leaf Other insect problems include caterpillars, weevils, scale and whiteflies. It thrives in many difficult growing conditions. Can sucker from its roots. Clouded Sulphur (Colias philodice) larvae appear from May to October in the north and from March to November in the south. Robin, a phytotoxin; robitin, a glycoside; robinine, an alkaloid. The Black Locust is a memeber of the Pea Family. Description Robinia pseudoacacia 'Unifoliola' Closed, broad pyramidal tree 15 - 18 m high. Native; Deciduous; Medium size tree growing up to 75-95′ in height and 25-30′ wide canopy 15 cm) and 1 to 3 pairs of small side leaves. Robinia pseudoacacia, commonly called black locust, is medium sized, suckering, deciduous tree that typically grows to 30-50’ (less frequently to 80’) tall. N.C. These display from July to November. Trees send out long underground root suckers that not only become a maintenance problem but also can disrupt nearby gardening areas. Likes full sun and tolerant of most soils. 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. Seasons of Interest: Leaves: Bloom: Spring Fruit/Seed/Nut: Fall Robinia pseudoacacia is a deciduous Tree growing to 25 m (82ft) by 15 m (49ft) at a fast rate. It is considered to be a good selection for difficult areas where other trees will not grow well. It also will grow in suckering thickets. It is hardy to zone (UK) 3. 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. Fire Risk: This plant has a low flammability rating. Robinia pseudoacacia. This is a larval host plant for several butterflies. At its best, it will grow as a broadly columnar single trunk tree with a narrow oblong crown. In spring and early summer, fragrant, pea-like white flowers, borne in long (5 inch) hanging clusters mature. The irregularly shaped leaves hang on a long leaf stem and consist of a strikingly large top leaf (to approx. Trees send out long underground root suckers that not only become a maintenance problem but also can disrupt nearby gardening areas. It is generally a crooked tree and often has a tendency to fork. Black Locust is a deciduous tree that may grow 50 to 70 feet tall. These are followed by flat, reddish brown, leathery pods with a winged edge that often stay on the tree throughout the entire winter. Leaf: Alternate, pinnately compound, with 7 to 19 leaflets, 8 to 14 inches long. Robinia pseudoacacia afforestation improved soil and plant community characteristics.. Species trees are sometimes considered to be somewhat weedy. Tolerates some light shade, but avoid shady locations. Zarucco Duskywing (Erynnis zarucco) has three broods in the deep south from March-October, appearing as early as January in Florida. Leaves turn uneventful yellow in fall. Robinia or black locust Robinia, Robinia pseudoacacia, does not produce suckers in all circumstances and some big, old specimens have never caused problems. Black locust primarily invades disturbed habitats, degraded woods, thickets and old fields, where it crowds out native vegetation and forms single species stands. Soil / Climate: It is native to South Eastern United States. 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. 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. It is susceptible to locust borer (often fatal) and locust leaf miner (browns foliage). Robinia pseudoacacia can be pruned and kept at shrub size by cutting them to the ground every 2-3 years. 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. Its branches are usually armed with short paired spines (to 1.25” long). fire in the landscape. When Robinia 'Lace Lady' attracted my attention, at the Monrovia display garden in Oregon, its contorted branches and leaves were curling every which way.. Mature Height: 40-80 ft. Its trunk can grow to 3-4 feet in diameter. Leaf miner is a universal problem on the species. Heat and drought tolerant. Avoid pruning in spring when it tends to bleed.Species trees spread by self-seeding and root suckers. I first came across this specimen on a trip to London in late spring, close to two decades ago. Bees are attracted to the flowers. Promptly remove suckers as they appear unless naturalization is desired. form a strategic partnership called N.C. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees. Possible disease problems include canker, powdery mildew, leaf spots, wood rots and verticillium wilt. 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. Numerous cultivars have been bred in Europe, including some elegant leaf and flower colour forms, and a … The Garden wouldn't be the Garden without our Members, Donors and Volunteers. Robinia pseudoacacia 'Frisia'. 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. 7 BENEFITS of Robinia pseudoacacia ‘Frisia’. It is a medium-sized, deciduous, fast-growing thorny tree with high suckering capacity. The flowers are followed by smooth, flat, purple-brown seed pods (to 4-5” long). 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. Such was the case with Robinia pseudoacacia ‘Frisia’ and ‘Purple Robe’. Robinia hispida × Robinia pseudoacacia → Robinia × margarettae Ashe is a very rare locust hyrid known from MA. It is a vigorous grower with a vertical trunk and a squat, irregular crown. Fire Risk: This plant has a low flammability rating. 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 … 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. 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. The crown is significantly more closed in structure than that of the species. This attractive deciduous tree provides soft filtered shade with its open habit and pinnate leaf shape. The leaves are imparipinnate and the flowers are white. It develops shoots from roots. The leaves are alternate, pinnately compound with 7 to 21 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. Black Locust is easily transplanted and grown. It’s an extremely fast growing tree – 4 to 6 feet per year. Robinia pseudoacacia is an invasive species! Good drought tolerance. Grow in average, dry to medium, well-drained soils in full sun. Robinia pseudoacacia ‘Frisia’ problems. Leaves:       Bloom:   Spring    Fruit/Seed/Nut:  Fall. This is a good plant for difficult sites, transplants well, and tends to reseed. The shrubs to small trees (1–10 m tall) are hispid in the inflorescence and may be hispid on the petioles. Twisty Baby® black locust (Robinia pseudoacacia 'Lace Lady'): Smaller size tree (20 feet high by 20 feet wide) with contorted limbs. Robinia leafs out late and keeps its leaves long into the autumn. https://www.fs.fed.us/database/feis/plants/tree/robpse/all.html The tree produces a 2- to 4-inch flattened legume which contains 4 to 8 red-brown seeds. Ridged, and a squat, irregular crown vigorous grower with striking lime green foliage which intensifies into vibrant! Uk ) 3 came across this specimen on a trip to London in late spring underground root suckers that only! Make fence posts and rails columnar single trunk tree with high suckering.! More open areas and often has a tendency to fork trunk and narrow crown that grows with... 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