Details for: Ames 36251, Ulmus thomasii Sarg., JDC/UT/2024/008/1130


Summary Data
Taxonomy:
Ulmus thomasii Sarg.
Top Name:
JDC/UT/2024/008/1130
Origin:
Collected – Minnesota, United States
Received by NPGS:
05 Jun 2024
Improvement Status:
Wild material
Reproductive Uniformity:

Population
Form Received:
Seed
Life Cycle:
Perennial
Life Habit:
Tree
Availability
FormQuantityNoteInventoryCart
Seed100 countSample represents genetics from a single mother tree. Genetics from other genotypes may be provided upon request.Ames 36251 24ncao01 SD
 
Images (45 total. Click on image for more.)

PLANT

Core Passport Data
Taxonomy:
Ulmus thomasii Sarg.
Top Name:
JDC/UT/2024/008/1130
Origin:
Collected – Minnesota, United States
Received by NPGS:
05 Jun 2024
Improvement Status:
Wild material
Reproductive Uniformity:

Population
Form Received:
Seed
Life Cycle:
Perennial
Life Habit:
Tree
Source History
Collected
05 June 2024.
Kandiyohi County, Minnesota, United States
Locality: Near southeast edge of Kasota Lake approximately 9.0 miles east, southeast of Willmar, T119N R34W SE 1/4 NE 1/4 Sec. 36 and also Robbins Island Park in Wilmar, T119N R35W Sec. 11.
Coordinates: 45.0740, -94.8848 (Map it)
Elevation: 352m.
Georeference protocol: Lat/lon determined by GPS
Habitat: Wild Habitat
Environment description: Deciduous woods
Number of plants sampled: 11
Associated species: Ulmus americana, Euonymus atropurpureus, Quercus macrocarpa, Ulmus rubra, Staphylea trifolia, Acer negundo, Celtis occidentalis, Vitis riparia, Ribes sp., Rubus sp., Tilia americana, Prunus virginiana, and Gymnocladus dioicus.
Comment: Trees sampled from two areas separated by approximately 8 miles. Coordinates provided refer to general area of Kasota Lake. Coordinates for all mother trees sampled may be provided upon request. Timing of sampling would be considered near perfect as fruits had initiated senescence around the 2nd June. While sampling fruits were actively dropping and were dropping easily with minimal disturbance to branches.
Collector(s):
Donated
05 June 2024.
Iowa, United States

Donor(s):
Accession Names and Identifiers
JDC/UT/2024/008/1130
Type: Collector identifier
Carstens, Jeffrey D. USDA ARS NCRPIS

AS/UT/2024/009/295
Type: Collector identifier
Sherwood, Andrew P. USDA ARS NCRPIS

Kandiyohi County
Type: Local name

295-1
Type: Other or unclassified name
Single mother tree measuring 27.25 inches DBH.

295-2
Type: Other or unclassified name
Single mother tree measuring 10 inches DBH.

295-3
Type: Other or unclassified name
Single mother tree measuring 21.25 inches DBH.

295-4
Type: Other or unclassified name
Single mother tree measuring 20.5 inches DBH.

295-5
Type: Other or unclassified name
Single mother tree measuring 25.25 inches DBH.

295-6
Type: Other or unclassified name
Single mother tree measuring 13.5 inches DBH.

295-7
Type: Other or unclassified name
Single mother tree measuring 24 inches DBH.

295-8
Type: Other or unclassified name
Single mother tree measuring 21.25 inches DBH.

295-9
Type: Other or unclassified name
Single mother tree measuring 21.75 inches DBH.

295-10
Type: Other or unclassified name
Single mother tree measuring 29 inches DBH.

295-11
Type: Other or unclassified name
Single mother tree measuring 17 inches DBH.

Ames 36251
Type: Site identifier
Group: AMES
NC-7 Research Numbers

Narrative
Ulmus thomasii (Rock elm) is an underutilized tree species both in conservation and in the urban landscape. Described by Charles Sprague Sargent (first director for the Arnold Arborteum) as "heavy, hard, very strong and tough, closely grained, and susceptible of receiving a beautiful polish". Historically noted for a variety of uses in woodworking including furniture, heavy agricultural implements, timber frame buildings, pianos, hockey sticks, and hand tools. Ulmus thomasii is extremely drought tolerant, adaptable to very calcareous soils, and compared to U. americana or U. rubra has a very conservative growth rate requiring minimal attention in regards to pruning. Rock elm naturally tends to develop into a nice structural specimen in the landscape, unlike other fast growing cultivars in the nursery trade needing frequent attention. Rock elm has very fissured bark and is well known for maintaining a strong central leader resulting in a very attractive, pyramidal form. Despite many literature sources stating that "wings" on the stems are a key identifiying characteristic, this trait is not reliable and many genotypes may completely lack "wings" on the stems. While growth habit and morphology of dormant buds (very pointy) are good traits to help aid in identification, fruits are the best way to confirm identity. Fruits are densly pubescent, often described as "inflated" and generally reach maturity a couple weeks after Ulmus rubra and Ulmus americana. U. thomasii inflorescences are rather distinguishable from other Ulmus in being pendulous. Fruits are extremely prized treats for many birds, where fruits are often "robbed" prior to full maturity. Fruits are also highly prized by many other animals such as mice, squirrels, chipmunks, turkeys, etc. and are generally consumed within hours after fruit abscission. The native range of Ulmus thomasii is concentrated in the northeastern United States and into Canada with disjunct populations documented in northwestern Missouri and northwestern Arkansas. In the 1895 Silva of North America (vol. 7) it was stated that, “The value of the wood of the Rock Elm threatens its extinction and most of the large trees have already been cut.” Today, while rock elm is rather rare, especially in areas near the edges of its range, many states list the species as endangered or threatened warranting preservation efforts. Genetics of this accession would be representative of the species northwestern edge of its native range. Majority of specimens noted did not have characteristic "wings" on the stems and measured approximately 20" DBH or more with a few specimens nearing 30". Heights estimated between 70-90'. Rock elm in this area could be classified as locally abundant.
Ulmus thomasii Sarg.
Genus:
Ulmus
Subgenus:
Oreoptelea
Section:
Trichoptelea
Family:
Ulmaceae
Nomen number:

101705
Place of publication:

Silva 14:102. 1902 "thomasi"
Verified:
05/06/2009 by ARS Systematic Botanists.
Other conspecific taxa
Autonyms (not in current use), synonyms and invalid designations
Heterotypic Synonym(s)
Ulmus racemosa D. Thomas

Common names
LanguageNameAlternate namenoteseqCitation
Englishcork elm  1Voss, E. 1972-. Michigan flora.
Englishrock elm  1Wiersema, J. H. & B. León. 1999. World economic plants: a standard reference CRC Press, Boca Raton, FL.
Frenchorme de Thomas  2FNA Editorial Committee. 1993-. Flora of North America.
GermanFelsenulme  2Encke, F. et al. 1993. Zander: Handwörterbuch der Pflanzennamen, 14. Auflage
Swedishklippalm  2Aldén, B., S. Ryman, & M. Hjertson. 2012. Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource)
Annotations
Other Links
Actions
Pathogens
Vouchers
Herbarium specimen
  • Carstens, Jeffrey D., USDA ARS NCRPIS. 05 Jun 2024. Located at NA - United States National Arboretum, USDA/ARS. Identifier: JDC/UT/2024/008/1130-2. Inventory sample: Ames 36251 24ncao02. Voucher (fruiting) for original seed collection. Voucher collection assisted by Andrew P. Sherwood. .
  • Carstens, Jeffrey D., USDA ARS NCRPIS. 05 Jun 2024. Located at MIN - University of Minnesota, Bell Museum, St. Paul, MN. Identifier: JDC/UT/2024/008/1130-2. Inventory sample: Ames 36251 24ncao02. Voucher (fruiting) for original seed collection. Voucher collection assisted by Andrew P. Sherwood. .
Citations
Pedigree