Ulmaceae The Elm Family http://www.cirrusimage.com/Trees/Ulmaceae/American_elms_1024.jpg Ulmaceae The Elm Family

Ulmaceae Deciduous group with lots of variation Trees and shrubs 15-18 genera and 150 species 14 trees and 2 shrubs native to North America Temperate to tropical environments http://en.wikipedia.org/wiki/Ulmaceae

Leaf structure Alternate and simple Base often oblique Margins entire or serrate Venation pinnate to palmate- pinnate www.colby.edu http://luirig.altervista.org/flora/ulmus.htm

Flowers and Fruit Flowers are perfect or imperfect and lack petals Fruit are evenly winged samara or drupe http://botany.csdl.tamu.edu/FLORA/cgi/gallery_query?q=ulmus www.colby.edu

Ulmus americana American elm Tree that shades most streets and boulevards in FM area Tolerates wide variety of temperatures http://shade-trees.tripod.com/image/street_elms2.jpg http://www.statesymbolsusa.org/IMAGES/Massachusetts/American-Elm-Trees.jpg

Celtis occidentalis Hackberry Varies in size from shrub to trees (100+ feet) Usually found on rich, moist soils http://plants.usda.gov/java/profile?symbol=CEOC

Other Ulmaceae examples Tatar Wing Celtis (Pteroceltis tatarinowii ) Japanese zelkova (Zelkova serrata) http://www.sheffields.com/seed_common_name/tatar%20wing%20celtis Cedar Elm (Ulmus crassifolia) http://www.efloras.org/florataxon.aspx?flora_id=1001&taxon_id=10928 http://botany.csdl.tamu.edu/FLORA/WINSTON/sophora.htm

References Websites near all photos http://www.cnr.vt.edu/DENDRO/dendrology/syllabus/factsheet.cfm?ID=41 References Walters, Dirk., Keil, David., Murrell, Zack. 2006. Vascular Plant Taxonomy. 5th ed. U.S.: Kendall/Hunt. 283. Print. United States Department of Agriculture-Natural Resources Conservation Service. Plant Fact Sheet. “Common Hackberry.” 1 Feb 2002. [Internet] Websites near all photos