|University of California, Berkeley|
|Directory News Site Map Home|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Tree. Leaf: simple, alternate, 2-ranked; veins pinnate; stipules deciduous. Flower: radial; sepals 4–9, free to fused; corolla 0; stamens 4–9, opposite sepals; ovary superior, chamber 1, ovule 1, style branches 2. Fruit: 2-winged nutlet.
7 genera, ± 60 species: temperate to tropics; some cultivated for ornamental (Ulmus, Zelkova), used for wood (especially Ulmus). [Sytsma et al. 2002 Ann Missouri Bot Gard 89:1531–1546] Celtis moved to Cannabaceae. —Scientific Editor: Bruce G. Baldwin.
Unabridged references: [Elias 1970 J Arnold Arbor 51:18–40]
Deciduous. Leaf: serrate (or doubly so), base generally oblique, 2° veins straight, parallel, extending to margin, each ending in a tooth; axils of 2° veins generally with prominent tufts of hairs. Inflorescence: umbels or short racemes in leaf axils on old wood; flowers sessile or pedicels 7–17 mm. Flower: bisexual; calyx generally bell-shaped, lobes 4–9; stamens 4–9, exserted; ovary strongly compressed; style divided to base, branches spreading.Key to Ulmus
± 40 species: northern temperate. Widely cultivated as street trees; flowers, fruit needed for identification.
To 35 m; bark split into ridges that mostly curve together at their ends. Stem: corky outgrowths on branches 0; winter buds red-brown, conical or narrowly ovoid, ± pubescent. Leaf: 8.6–12.5 cm, 4.2–7 cm wide, elliptical or occasionally oblong, acuminate, generally slenderly so, margins strongly double-serrate, abaxial surface sparsely long-hairy on blade and veins, hairs tufted in vein axils. Inflorescence: flower, fruit before leaves in spring; pedicel 7–17 mm, slender. Fruit: 0.9–1.3 cm, 0.6–0.8 cm wide, elliptical or oblong, tan, margins densely ciliate, surfaces glabrous.
Seeding along disturbed streambanks, or spreading by root suckers near old plantings; 60–700 m. Sacramento Valley, South Coast; native to eastern United States. Feb–Mar [Online Interchange]
Previous taxon: Ulmus
Next taxon: Ulmus minor
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Mar 27 2015
Citation for this treatment: [Author of taxon treatment] 2013. Ulmus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=47473, accessed on Mar 27 2015
Copyright © 2014 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.
See CalPhotos for additional images
© 2007 Louis-M. Landry
|Geographic subdivisions indicated for the distribution of Ulmus americana|| Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
READ ABOUT YELLOW FLAGS
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
View elevation by latitude chart
| Data provided by the participants of the Consortium of California Herbaria.
View all CCH records
CCH collections by month