Widely distributed, but most diverse in temperate regions of the Northern Hemisphere.
Floral characters
Inflorescences determinate, forming fasciciles axillary. Flowers bisexual or unisexual (plants then monoecious, dioecious, or polygamous), radial, inconspicuous, with hypanthium. Tepals 4-9, distinct to connate, usually imbricate. Stamens 4-9, opposite the tepals;filamentd distinct, erect in but; pollen grains 4-6-porate. Carpels2, connate; ovary superior, with apical placentation and usually 1 locule; stigmas 2, extending along adaxial side of style. Ovule1.
Leaf characters
alternate, clearly 2-ranked, simple, simply ore doubly serrate, with pinnate venation, secondary veins ending in the teeth, blade with asymmetrical base; stipules present
Stipules
present
Fruit characters
Fruit a samara or nutlet; seeds flat; embryo straight; endosperm of a single layer of cells and appearing absent.
Glands
absent
Hairs
Hairs on leaves
Latex
absent
Odor
absent
Uses
Lumber: Aphanante, Celtis, Holoptelea, Trema, Zelkova Forage: Celcis Bark: Celcis, Trema, Ulmus Medicaments: bark from Ulmus americana
Chemical characters
often with tannins; cystoliths present; laticifers absent
Distribution maps
(online von http://www.mobot.org/MOBOT/research/APweb/ . Dort zitiert wie unter jedem Diagramm vermerkt):
Ulmaceae
map: from Soepadmo 1977; Hultén & Fries 1986; Fl. N. Am. III 1997, incomplete
