Ulmus parvifolia - Lacebark Elm (Ulmaceae) --------------------------------------------------------------------------- Ulmus parvifolia is perhaps the best all-around Elm caliper, which allows for a large for its combination of clean foliage, autumn color, surface area for the ornamental ornamental bark, and resistance to Dutch elm disease. bark to be displayed upon, in addition to the several co-dominant FEATURES trunks and many branches in the Form canopy -large shade tree -young bark is a flaky brown-gray -maturing at about 50' tall x 60' color, but mature bark is an wide exfoliating, mottled, and flaky -upright oval growth habit in combination of gray, green, orange, youth, becoming spreading, tan, and red-brown, and greatly rounded, or broad-vased with increases in beauty with age age -medium growth rate USAGE Culture Function -full sun to partial sun -shade or specimen tree, giving -best performance occurs in full sun in moist, well- dappled shade in youth drained soils, but it is very urban tolerant, including Texture adaptability to poor soils, dry soils, soils of various -medium-fine texture in foliage and fine texure when pH, heat, and drought bare -propagated by seeds or rooted stem cuttings -open to average density in foliage but thick density -Elm Family, with no disease or pest problems of when bare ornamental significance, including its resistance to Assets Dutch elm disease -excellent autumn color mixture that transitions very -moderately available in B&B form late in the landscape Foliage -ornamental bark with age -dark green and shiny, -fine-textured winter twigs that are semi-pendulous alternate, elliptical to with age, and a broad-vased growth habit with large ovate, serrated, nearly spreading trunks symmetrical at the -urban tolerant base, and unusually Liabilities small for an Elm -marginally hardy in severe zone 5 winters (usually only 1.5" Habitat long) -species form is generally hardy from zones 5 to 8 -autumn color is an (cultivars range from a extra-hardy zone 4 to a tender excellent mixture of zone 7 in terms of their northern range cold yellow, gold, orange, hardiness) red, purple, and green, -Native to the Orient and coloring very late, in early- to mid-Nov. SELECTIONS Flowers Alternates -inflorescences open in Aug. and early Sept., are -trees with ornamental bark (Acer griseum, Betula greenish-yellow, occur in the leaf axils, and are papyrifera, Fagus sylvatica, Syringa reticulata, noticeable but ornamentally insignificant, being Zelkova serrata, etc.) rather small and hidden among the foliage -shade tree members of the Elm Family that are Fruits resistant to Dutch elm disease and are of ornamental -initial color of the fruits is a striking lime green, quality (Ulmus americana 'Delaware #2', Ulmus quickly maturing to a deep russet, both of which 'Homestead', Ulmus 'Pioneer', Ulmus 'Regal', Ulmus contrast well against the dark green, shiny foliage 'Urban', Zelkova serrata) rapidly growing in Sept. and maturing in Oct., with Cultivars – Variants – Related species the small samaras notched at their apex and hanging -the species form is still the predominate form in clusters from the leaf axils available; however, a number of cultivars exist based Twigs upon superior growth rate, summer foliage, autumn -the mature first-year gray stems are very slender, color, ornamental bark, and variable growth habits, slightly zigzag, ultra-fine textured, and with very but none have yet become widely established in the small winter buds nursery trade: Trunk -'Emer 1' = Athena™ Lacebark Elm (PP7551) - from -usually single-trunked but branching at about 5-8' Bailey Nursery; selection noted for its broad rounded off the ground into several co-dominant trunks the habit and attractive bark. give the tree its spreading, rounded, or broad-vased growth habit -trunk diameter at its base at maturity is 3-4' of.