Ostrya virginiana

Source: Wikipedia, the free encyclopedia.

American hophornbeam
A hophornbeam branch with the characteristic hop-resembling fruits[1] in early summer

Least Concern  (IUCN 3.1)[2]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fagales
Family: Betulaceae
Genus: Ostrya
Species:
O. virginiana
Binomial name
Ostrya virginiana
Generalized native range
Synonyms[3]
  • Carpinus virginiana Mill.
  • Zugilus virginica Raf.
  • Ostrya italica subsp. virginiana (Mill.) H.J.P.Winkl.
  • Carpinus virginica Münchh.
  • Carpinus triflora Moench
  • Ostrya virginica (Münchh.) Willd.
  • Ostrya americana F.Michx.
  • Ostrya ostrya MacMill.
  • Ostrya baileyi Rose
  • Ostrya guatemalensis
    (H.J.P.Winkl.) Rose
  • Ostrya mexicana Rose

Ostrya virginiana, the American hophornbeam, is a species of

native to eastern North America, from Nova Scotia west to southern Manitoba and eastern Wyoming, southeast to northern Florida and southwest to eastern Texas.[4] Populations from Mexico and Central America are also regarded as the same species, although some authors prefer to separate them as a distinct species, Ostrya guatemalensis.[3] Other names include eastern hophornbeam, hardhack (in New England), ironwood, and leverwood.[5][6]

Description

Ostrya virginiana (American hophornbeam) is a small deciduous understory tree growing to 18 m (59 ft) tall and 20–50 centimetres (8–20 in) trunk diameter. The bark is brown to gray-brown, with narrow shaggy plates flaking off, while younger twigs and branches are smoother and gray, with small lenticels.[5][7] Very young twigs are sparsely fuzzy to thickly hairy; the hairs (trichomes) drop off by the next year.[8]

The

doubly serrated margin. The upper surface is mostly hairless, while the lower surface is sparsely to moderately fuzzy (rarely densely hairy).[5][7]

The

pistillate (female) catkins are 8–15 mm (5161932 in) long, containing 10–30 flowers each.[5]

Pollinated female flowers develop into small

involucre 10–18 mm (381116 in) long and 8–10 mm (51638 in) wide.[5] The involucre changes from greenish-white to dull brown as the fruit matures.[7]

American hophornbeam is similar to its close relative

American hornbeam (Carpinus caroliniana), which can be distinguished by its smooth bark and nutlets enclosed in open, three-lobed bracts.[7]

  • Bark of a mature tree
    Bark of a mature tree
  • Male catkins hanging from the branches in spring (United States Botanic Garden)
    Male catkins hanging from the branches in spring (United States Botanic Garden)
  • Leaf color in autumn
    Leaf color in autumn
  • Two trees in winter with some dried leaves still hanging on their branches (marcescence)
    Two trees in winter with some dried leaves still hanging on their branches (marcescence)
  • An exceptionally large trunk
    An exceptionally large trunk

Subdivisions

There are two subspecies:

  • Ostrya virginiana subsp. guatemalensis (H.J.P.Winkl.) A.E.Murray – central and southern Mexico, Guatemala, Honduras, El Salvador[9]
  • Ostrya virginiana subsp. virginiana – eastern half of United States, eastern Canada

Populations along the Atlantic coast have slightly smaller leaves, and are sometimes separated as O. virginiana var. lasia Fernald.[5]

Habitat and ecology

In temperate areas of the US and Canada, Ostrya virginiana is found in lowland and foothill forests, where it is predominantly an understory tree.[2]

In Mexico and Central America, Ostrya virginiana is found in cloud forests and humid portions of mid-elevation oak, pine–oak, and pine forests between 1200 and 2800 meters elevation.[10]

The buds and catkins are important source of winter food for some birds, notably ruffed grouse (Bonasa umbellus).[7] Additionally, the nutlets and buds are eaten by birds, deer, and rabbits.[1]

Uses

It is not typically grown as an ornamental plant and is sometimes used as a street tree.[11]

Its wood is very resilient and is valued for making tool handles and fence posts. [12]

Being a diffuse porous hardwood and having extremely high density and resistance to compression, it is an excellent material for the construction of wooden longbows.[citation needed]

References

  1. ^ .
  2. ^ . Retrieved 19 November 2021.
  3. ^ a b "Ostrya virginiana". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  4. ^ "Ostrya virginiana". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
  5. ^ a b c d e f g Furlow, John J. (1997). "Ostrya virginiana". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 3. New York and Oxford: Oxford University Press – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  6. ^ Nelson Sutherland, C.H. (2008). Catálogo de las plantes vasculares de Honduras. Espermatofitas: 1-1576. SERNA/Guaymuras, Tegucigalpa, Honduras.
  7. ^ a b c d e f Hilty, John (2020). "Hop Hornbeam (Ostrya virginiana)". Illinois Wildflowers.
  8. ^ Chayka, Katy; Dziuk, Peter (2016). "Ostrya virginiana (Ironwood)". Minnesota Wildflowers.
  9. ^ Whittemore, Alan. "Ostrya virginiana". Flora Mesoamericana. Missouri Botanical Garden – via Tropicos.org.
  10. ^ "Ostrya virginiana (Mill". www.srs.fs.usda.gov. Retrieved 2024-03-10.
  11. ^ "Ostrya virginiana (American Hop-hornbeam, Eastern Hop Hornbeam, Hop Hornbeam, Hop Horn Beam, Ironwood, Leverwood, Wooly Hop hornbeam) | North Carolina Extension Gardener Plant Toolbox". plants.ces.ncsu.edu. Retrieved 2024-03-10.

External links