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Ulmus pumila
SIBERIAN ELM

Higher Taxonomy
Family: UlmaceaeView Description 

Common Name: ELM FAMILY
Habit: 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.
Genera In Family: 7 genera, +- 60 species: temperate to tropics; some cultivated for ornamental (Ulmus, Zelkova), used for wood (especially Ulmus). Note: Celtis moved to Cannabaceae.
eFlora Treatment Author: Alan T. Whittemore
Scientific Editor: Bruce G. Baldwin.
Genus: UlmusView DescriptionDichotomous Key

Common Name: ELM
Habit: 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.
Species In Genus: +- 40 species: northern temperate. Note: Widely cultivated as street trees; flowers, fruit needed for identification.

Ulmus pumila L.
NATURALIZED
Habit: To 25 m; bark deeply ridged, remaining firmly attached, medium gray. Stem: corky outgrowths on branches 0; winter buds dark brown or red-brown, +- spheric to ovoid; inner bud scale margins generally white ciliate. Leaf: 2--8 cm, 1.2--3.5 cm wide, ovate- to lance-elliptic, acute or short-acuminate (acuminate), margins simply or doubly serrate, abaxial surface glabrous or pubescent only on major veins and tufted in vein axils. Inflorescence: flower, fruit before leaves in spring; pedicel +- 0. Fruit: 1--2 cm, 1--1.5 cm wide, +- round (broadly obovate or elliptic), +- white-tan, glabrous except for pubescence on stigmatic surface in notch.
Ecology: Streambanks, washes, bottomland, roadsides, disturbed areas; Elevation: 20--1500 m. Bioregional Distribution: SN, SW, GB; Distribution Outside California: native to northern Asia. Flowering Time: Mar--Apr
eFlora Treatment Author: Alan T. Whittemore
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botanical illustration including Ulmus pumila

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Citation for this treatment: Alan T. Whittemore 2016. Ulmus pumila, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=47484, accessed on May 29, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 29, 2016.


Ulmus pumila
click for enlargement
© 2015 Steve Matson
Ulmus pumila
click for enlargement
© 2015 Steve Matson
Ulmus pumila
click for enlargement
© 2015 Steve Matson
Ulmus pumila
click for enlargement
© 2015 Steve Matson

More photos of Ulmus pumila in CalPhotos


Geographic subdivisions for Ulmus pumila:
SN, SW, GB;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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map of distribution 1
(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).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.