Ulmus crassifolia Nutt., the Texas cedar elm or simply cedar elm, is a deciduous tree native to south central North America, mainly in southern and eastern Texas, southern Oklahoma, Arkansas and Louisiana, with small populations in western Mississippi, southwest Tennessee and north central Florida; it also occurs in northeastern Mexico.Todzia, C. A. & Panero, J. L. (2006). A new species of Ulmus (Ulmaceae) from southern Mexico and a synopsis of the species in Mexico. Brittonia, Vol 50, (3): 346 It is the most common elm tree in Texas. The tree typically grows well in flat valley bottom areas referred to as 'Cedar Elm Flats'. The common name 'cedar elm' is derived from the trees' association with juniper trees, locally known as cedars.
No narrative description available for this taxon yet.
⚠ sources differ — GIFT: 23.56 m · USDA: 27.43 m · TRY: 27 m
Seed mass6.48 mg
Seed mass max6.77 mg
Seed mass min5.36 mg
Life cycle & reproduction25
Bloom periodLate Summer
Coppice potentialYes
Deciduousnessdeciduous
Dispersal typewind
Flower colourgreen
Flower conspicuousNo
Fruit seed period beginSummer
Fruit seed period endFall
Growth rate USDARapid
Life formtree
Life spanperennial
Lifespan categoryShort
Propagated by bare rootYes
Propagated by bulbNo
Propagated by containerYes
Propagated by cormNo
Propagated by cuttingsYes
Propagated by seedYes
Propagated by sodNo
Propagated by sprigsNo
Propagated by tubersNo
Resprout abilityYes
Seed spread rateRapid
Seedling vigorMedium
Vegetative spread rateNone
Diet & foraging1
Parasiteindependent
Habitat & environment24
Active growth periodSpring and Summer
Adapted to coarse textured soilsYes
Adapted to fine textured soilsYes
Adapted to medium textured soilsYes
Aquaticterrestrial
BloatNone
Climatetemperate
Climberself-supporting
Epiphyteterrestrial
Foliage colorGreen
Foliage porosity summerDense
Foliage porosity winterPorous
Foliage textureMedium
Fruit colourbrown
Growth formtree
Growth form USDASingle Stem
Hedge toleranceNone
Known allelopathNo
Leaf retentionNo
Low growing grassNo
Root depth min24 in
Shape and orientationErect
Small grainNo
Woodinesswoody
Physiology & chemistry19
Anaerobic toleranceNone
C:N ratioHigh
Caco3 toleranceLow
Cold stratification requiredYes
Drought toleranceMedium
Fertility requirementMedium
Fire resistantNo
Fire toleranceLow
Frost free days min220 days
Moisture useMedium
Nitrogen fixation levelNone
Photosynthetic pathwayC3
Precipitation max70 in
Precipitation min20 in
Salinity toleranceNone
Shade toleranceMedium
Soil pH max8.1 pH
Soil pH min5 pH
Temperature min-10 °F
Uses & economy15
Berry nut seed productNo
Christmas tree productNo
Commercial availabilityRoutinely Available
Fodder productNo
Fuelwood productMedium
Lumber productYes
Naval store productNo
Nursery stock productYes
Palatable browse animalLow
Palatable humanNo
Post productYes
Pulpwood productNo
Seeds per pound67 000 per lb
ToxicityNone
Veneer productNo
Other traits7
Fall conspicuousYes
Fruit seed abundanceHigh
Fruit seed conspicuousNo
Fruit seed persistenceNo
Height at 20yr10.67 m
Planting density max800 per acre
Planting density min300 per acre
05DNA & barcoding2 specimens
A DNA barcode is a short, standardised stretch of genes that works like a fingerprint — enough to tell one species from another. Below is the molecular trace Ulmus crassifolia has left across the world's sequence archives.
At a glance
DNA specimens2
Marker genes3
GenBank sequences9
eDNA detections2
The DNA barcodea real sequence read deposited for this species
★ the standard DNA barcode for this group — the short region actually read to tell this species apart. The rest are extra genes sequenced along the way.
★matK1★rbcL2★ITS6
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualUlmus crassifolia carries — its genome. We read it from three angles — how big it is, how the DNA is packed into chromosomes, and how completely it has been sequenced — and explain how to read each value as you go.
Chromosomes & ploidyhow the DNA is packaged
2n is the full chromosome count in a normal body cell; n is a gamete (egg or sperm), which carries half. Ploidy is how many complete chromosome sets each cell holds — 2× (diploid) is typical for animals, while higher levels (polyploidy) are common in plants. Click any value below to see the underlying records and sources.
Chromosomes2n = 28 n = 14
Ploidydiploid inferred
Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references
2n 281×CCDB · eflora
CCDB · eflora
Ploidy records — measured levels and diploid/polyploid inferences · click for sources
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy94% within 1 km
≤100 m 9 423≤1 km 1 172≤10 km 318>10 km 408
11 321 georeferenced · 2 198 without coordinates
Open the mapobservation + sensor13 519
Museum / Voucheredphysical evidence
Backed by a physical specimen — a herbarium sheet, sample or voucher held in a collection. “Vouchered” means supported by material evidence, not just an observation.
Coordinate accuracy46% within 1 km
≤100 m 50≤1 km 104≤10 km 151>10 km 28
333 georeferenced · 204 without coordinates
Open the institutions mapphysical evidence537
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
10Collections & institutions
Holding institutions45 of 58 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Fort Worth, US
126
Austin, US
60
BAYLUlocation not on record
51
Bronx, US
50
Denton, US
48
Jackson, US
20
Texas Lutheran Universitylocation not on record
16
Chapel Hill, US
15
Saint Louis, US
12
Wuzhou, CN
11
Fayetteville, US
11
Little Rock, US
10
Tampa, US
7
Edmonton, CA
6
Chongqing Museumlocation not on record
6
Tempe, US
6
Lubbock, US
5
DOI/NPS, Mississippi National River & Recreation Arealocation not on record
5
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record
4
Burlington, US
3
US
3
Rotorua, NZ
3
EL PASO, US
3
Miami, US
3
Columbia, US
3
Clemson, US
2
Flagstaff, US
2
Bangkok, TH
2
Tall Timbers Research Stationlocation not on record
2
Stephenville, US
2
Durango, MX
2
Mexico City, MX
2
Conway, US
2
Mississippi State, US
2
Auckland, NZ
2
Linares, MX
2
Museum of the Rockieslocation not on record
2
Salvador, BR
2
Canadian Department of Agriculturelocation not on record
2
Oskarshamn, SE
2
Dresden, DE
1
University of Stellenboschlocation not on record
1
University of Southern Mississippilocation not on record
1
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
1
Austin, US
1
Williamsburg, US
1
Conway, US
1
Cambridge, US
1
Pittsburg, US
1
Phoenix, US
1
San Angelo, US
1
Bloomington, US
1
ASUlocation not on record
1
Washington, US
1
Logan, US
1
Riverside, US
1
Denver, US
1
Jena Microbial Resource Collectionlocation not on record
1
58 institutions · 535 of 537 vouchered records shown · 2 without an institution code
09Environmental DNA2 detections
Where the DNA of Ulmus crassifolia was picked up in samples of water, soil or air — nobody saw the organism, only its DNA left behind. A trace is a clue that the species was near, not a confirmed sighting.
Signal
Detections DNA found2
Studies independent surveys1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 2 detections have coordinates
Open the map0 countries0
How strong is each trace?
DNA read depthRead counts were not reported for this species — the map shows presence only, not how strong each trace was.
How to read this: each dot is one detection of this species' DNA in an environmental sample. The confidence meter weighs how many independent studies and places back up the signal — one detection in one study is a hint; many across several studies is solid. Records dated before 2008 (when eDNA methods began) are treated as likely mislabeled and left off the map.
WikipediaWikimedia Foundation4 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility14 056 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI2 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics2 specimens↗
NCBIUS National Library of Medicinesequences↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
WikidataWikimedia Foundationstructured facts↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗