Jump to content

List of hardy palms

Edit links
From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by DrZplant (talk | contribs) at 22:53, 17 November 2019 (→Fan palms). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Dwarf palmetto Sabal minor with a dusting of snow, Congaree National Park, South Carolina.

Hardy palms are any of the species of palm (Arecaceae) that are able to withstand brief periods of colder temperatures and even occasional snowfall. A few palms are native to higher elevations of south Asia where true winter conditions occur, while a few others are native to the warmer parts of the temperate zone in North America. A few of these temperate climate palms can tolerate hard freezes with little or no damage. Many of these "hardy " species can be cultivated in warmer parts of temperate climates.

The cold hardiness of palms varies by species. The hardiest species are found in the tribe Trachycarpeae, and in particular the genera Washingtonia and Rhapis, with species which are found in the wild in areas where the mean temperature of the coldest month of the year is not much less that 5 °C (41 °F), and Trachycarpus, with species which are found in the wild in areas where the mean temperature of the coldest month of the year is as low as 0.2 °C (32.4 °F). Members of these and other genera are sometimes grown in areas where they are not truly hardy, overwintering with the aid of various kinds of artificial protection.[1]

Fan palms

The fan palms (Arecaceae tribe Corypheae; palms with fan-shaped leaves) include all of the hardiest palms.

In the United States Trachycarpus is cultivated along the Pacific coast and as far north as Seattle, and along the Atlantic coast as far north as Long Island, New York/coastal Connecticut and interior Connecticut in Litchfield county Cite error: The <ref> tag has too many names (see the help page).[2]) – With Jubaea, possibly the hardiest known pinnate-leaved palm. B. odorata is a palm native to Brazil and Uruguay.[3] This palm grows up to 6 m (20 ft), exceptionally 8 m (26 ft), in a slow but steady manner. It is easily identifiable with beautiful pinnate leaves that arch outwards from a thick stout trunk. B. odorata is notable as one of the hardiest feather palms, tolerating temperatures down to about −10 °C (14 °F); it is widely cultivated in warm temperate regions. It is commonly grown on the East Coast of the United States as far north as Virginia Beach, Virginia and Portland and Seattle on the West coast. It thrives in humid subtropical climates. This tree is commonly known as the "jelly palm" because of the sticky, edible, date-like fruit it produces, which is used in many South American countries to make jelly.[citation needed]

  • Butia eriospatha - Woolly Jelly Palm - Though it maybe more cold tolerant, in N. America it is not found in cultivation as much as B. ordorata. This maybe due to being native to a remote mountainous region of Southern Brazil, at altitudes of 1,000 m (3,300 ft). The weather is more similar to N. America's Pacific Northwest, with wet winters and cool summer days. Unlike Southern California, where more, maybe the majority, of N. America's commercial palm growers (nurserys) are located.[4]
  • Chamaedorea microspadix and Chamaedorea radicalis – the hardiest known species in the genus Chamaedorea. Both species come from Mexico and are considered stem hardy to about −11 °C (12 °F), although they will lose their leaves at temperatures below about −6 °C (21 °F).[citation needed]
  • Canary Island Date Palm (Phoenix canariensis) – This species is hardy to about −10 °C (14 °F), and is grown as far north as the south of England (50°N), producing viable seed (in Southsea, Hampshire). In North America mature specimens can be found as far north as Gold Beach, Oregon (42.5º N) on the West Coast, and Myrtle Beach, South Carolina (34.1 N) on the East Coast. This palm is one of the most commonly grown palms in the world. Well adapted to low humidity and little watering, this palm is used as an ornamental in both Mediterranean climates and desert climates. In more humid climates, these trees will often be seen with sword ferns sprouting just beneath the crown.
  • Cretan Date Palm (Phoenix theophrasti) – Another species of Phoenix which may show similar frost tolerance, native to Crete and southwest Turkey, but has not been adequately tested.[citation needed]
  • Date Palm (Phoenix dactylifera) – This relative of the Canary Island date palm, and producer of the edible date, is also hardy to about −11 °C (12 °F), but does not tolerate very wet areas. This palm is one of the staple plants of the Middle East for its versatility and edible fruit.[citation needed]
  • Mule Palm (× Butiagrus nabonnandii) – Hardy to about −10 °C (14 °F). Manmade hybrid between the Butia palm and Queen palm. One of the hardiest feather palms. It combines the hardiness of the Butia palm with the fast-growing, tropical fronds of the Queen palm. Mature specimens are quite rare due to the difficulty in producing this palm and the characteristics and cold tolerance of the palm is variable with each specimen. Many of them resemble coconut palms.[citation needed]
  • Ceroxylon quindiuense – It is native to the Colombian Andes where it is found at 2,500–2,800 m (8,200–9,200 ft) above sea level. At this altitude it tolerates occasional frosts for short periods of time.
  • Ceroxylon alpinum – It is native to the Andes
  • Archontophoenix cunninghamiana – It is native to Australia.
  • Howea forsteriana – It is native to Lord Howe Island in Australia.
  • Rhopalostylis sapida – It is native to New Zealand. It is southernmost palm in the world found as far south as 44°S.
  • Caryota species – They are generally considered tolerant to occasional frosts.
  • Dypsis decipiens – It is native to Madagascar.

Plants referred to as palms

Some plants used in subtropical landscaping in temperate climates like much of Europe, northern China/Japan, Korea, the northern USA, New Zealand, etc. that are commonly referred to as "palms", but are not palms, i.e. not members of the Arecaceae family, include: yuccas, Aloidendron barberae, Cordyline australis, Cordyline indivisa, Cycas revoluta, Macrozamia communis, Macrozamia johnsonii, Macrozamia riedlei, Cyathea australis, Cyathea capensis, Cyathea cooperi, Cyathea dealbata, Cyathea medullaris, Dicksonia antarctica, Dicksonia squarrosa, Pseudopanax ferox, and occasionally the sumac Rhus typhina.

Hardiness

In general, hardy palms can only tolerate brief periods with temperatures in the range −18 to −12 °C (0 to 10 °F). As such, this generally limits hardy palm cultivation and long term specimens to zone 7a or higher. Some hardy palms can be cultivated in areas with low temperatures slightly below this range when given wind sheltering (planted on the south side of a building). In the US, hardy palm cultivation is generally attempted from USDA zones 6b/7a southward.[citation needed]

In very cold winter areas below zone 6b, cold hardy palms have been cultivated by partially (or completely) covering plants with mini-green house coverings and wraps. Some garden enthusiasts in severe cold winter areas have gone as far as heating the interiors of these winter enclosures. As such, there are occasional reports of hardy palms be cultivated in areas with severe winters with low temperatures below −18 °C (0 °F).[citation needed]

References

  1. ^ Reichgeld, Tammo; West, Christopher K.; Greenwood, David R. (16 March 2018). "The relation between global palm distribution and climate". Scientific Reports. 8 (1): 4721. Bibcode:2018NatSR...8.4721R. doi:10.1038/s41598-018-23147-2. ISSN 2045-2322. PMC 5856843. PMID 29549297.
  2. ^ Wunderlin, R. P.; Hansen, B. F.; Franck, A. R.; Essig, F. B. (16 September 2018). "Butia capitata - Species Page". Atlas of Florida Plants. Institute for Systematic Botany, University of South Florida, Tampa. Retrieved 17 September 2018. Recent taxonomy suggests B. odorata is the species naturalized in Florida, which has globose fruits, small midrib bundles completely encircling the fibrous cylinder, and does not have raphide-containing idioblasts in the foliar margin, unlike B. capitata (Sant'Anna-Santos et. al 2015)
  3. ^ Cite error: The named reference Soares2015 was invoked but never defined (see the help page).
  4. ^ "Butia eriospatha - Palmpedia - Palm Grower's Guide". www.palmpedia.net. Retrieved 2019-05-24. 
  5. http://oak.conncoll.edu:8080/notabletrees/ViewTreeData.jsp?selected=226222
Retrieved from "https://en.wikipedia.org/enwiki/w/index.php?title=List_of_hardy_palms&oldid=926666866"