Ulmus parvifolia 'Frosty'
Elm cultivar
From Wikipedia, the free encyclopedia
The Chinese elm cultivar Ulmus parvifolia 'Frosty', or 'Frosty' lacebark elm, was intended primarily as a dwarf variegated variety. Krüssmann (1976) states that it was raised in Japan.[1] It was first distributed by the Mitsch Nursery, Oregon, USA.[2]
| Ulmus parvifolia 'Frosty' | |
|---|---|
'Frosty' leaves. | |
| Species | Ulmus parvifolia |
| Cultivar | 'Frosty' |
| Origin | Japan |
Description
The tree is distinguished by its small leaves, which rarely exceed 18 mm in length and feature at first irregular white-flecked margins, "finally white only on the teeth".[3][4] The foliage emerges creamy-yellow in spring,[5] some leaves remaining pale later into the year.[6] The canopy turns rich yellow in the fall.[7] Descriptions of the cultivar's vigour and ultimate height vary from "a slow-growing shrub attaining no more than 8 ft (2.5 m)",[6] to "growing at a fast rate, to about 20 ft tall at maturity, with a spread of 15 ft".[7]
Pests and diseases
The species and its cultivars are highly resistant, but not immune, to Dutch elm disease, and unaffected by the elm leaf beetle Xanthogaleruca luteola.[8]
Cultivation
Notable trees
Spencer (1995) reported a large specimen reverting to green, at the back entrance of Beechworth Mental Hospital, Beechworth, Victoria, Australia.[10]
Cultivars
- 'Lois Hole', raised from a cutting of 'Frosty', has more pronounced white margins.
Accessions
North America
- Dawes Arboretum Newark, Ohio, US. 1 tree, accession number 1981-0131.001.[11]
- Denver Botanic Gardens, US. No details available
- Holden Arboretum, US. Acc. no. 85–176
- J.C. Raulston Arboretum, Raleigh, North Carolina. No accession details on bark label.[12]
- Smith College, US. Acc. no. 23703
Europe
- Clapton Court, Somerset, UK. TROBI Champion, 7 m high, d.b.h. 14 cm in 2006
- Royal Horticultural Society Gardens, Wisley, UK. No details available
- Sir Harold Hillier Gardens, UK. Acc. no. 1982.0008