Oxydendrum

Oxydendrum
Sourwood
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Ericales
Family: Ericaceae
Subfamily: Vaccinioideae
Tribe: Oxydendreae
Cox
Genus: Oxydendrum
DC.
Species: O. arboreum
Binomial name
Oxydendrum arboreum
(L.) DC.

Sourwood or sorrel tree (Oxydendrum arboreum, play /ˌɒksɨˈdɛndrəm ɑrˈbɔəriəm/)[1] is the sole species in the genus Oxydendrum, in the family Ericaceae. It is native to eastern North America, from southern Pennsylvania south to northwest Florida and west to southern Illinois; it is most common in the lower chain of the Appalachian Mountains. The tree is frequently seen as a component of oak-heath forests.[2][3]

Foliage

Contents

Growth

Sourwood is a small tree or large shrub, growing to 10–20 m tall (30 to 65 feet) with a trunk up to 50 cm (20 inches) diameter. Occasionally on extremely productive sites, this species can reach heights in excess of 30 meters and 60 cm diameter. The leaves are spirally arranged, deciduous, 8–20 cm (3-8 inches) long and 4–9 cm (2.5 to 3.5 inches) broad, with a finely serrated margin; they are dark green in summer, but turn vivid red in fall. The flowers are white, bell-shaped, 6–9 mm ( 1/4 to 1/3 inch) long, produced on 15–25 cm (6-10 inches) long panicles. The fruit is a small woody capsule. The roots are shallow, and the tree grows best when there is little root competition; it also requires acidic soils for successful growth. The leaves can be chewed (but should not be swallowed) to help alleviate a dry-feeling mouth.

Description

Raceme of flowers

The bark is gray with a reddish tinge, deeply furrowed and scaly. Branchlets at first are light yellow green, but later turn reddish brown. The wood is reddish brown, with paler sapwood; it is heavy, hard, and close-grained, and will take a high polish. Its specific gravity is 0.7458, with a density of 46.48 lb/cu ft.

The winter buds are axillary, minute, dark red, and partly immersed in the bark. Inner scales enlarge when spring growth begins. Leaves are alternate, four to seven inches long, 1.5 to 2.5 inches wide, oblong to ablanceolate, wedge-shaped at the base, serrate, and acute or acuminate. Leaf veins are Feather-veined, the midrib is conspicuous. They emerge from the bud revolute, bronze green and shining, and smooth; when full grown, they are dark green, shining above, and pale and glaucous below. In autumn, they turn bright scarlet. Petioles are long and slender, with stipules wanting. They are heavily laden with acid.

In June and July, perfect, cream-white flowers are borne in terminal panicles of secund racemes seven to eight inches long; rachis and short pedicels are downy. The calyx is five-parted and persistent; lobes are valvate in bud. The corolla is ovoid-cylindric, narrowed at the throat, cream-white, and five-toothed. The 10 stamens are inserted on the corolla; filaments are wider than the anthers; anthers are two-celled. The pistil is ovary superior, ovoid, and five-celled; the style is columnar; the stigma is simple; the disk is ten-toothed, and ovules are many.

The fruit is a capsule, downy, five-valved, five-angled, and tipped by the persistent style; the pedicels are curving.[4]

Cultivation and uses

The sourwood is perfectly hardy in the north and a worthy ornamental tree in lawns and parks. Its late bloom makes it desirable, and its autumnal coloring is particularly beautiful and brilliant. The leaves are heavily charged with acid, and to some extent have the poise of those of the peach.[4] The leaves are also a laxative.[citation needed]

It is renowned for nectar, and for the honey which is produced from it. Juice from its blooms is used to make sourwood jelly. The shoots were used by the Cherokee and the Catawba to make arrowshafts.

In Appalachian culture

"Sourwood Mountain" is the name of a popular old-time tune in the Appalachian region of the United States.[1]lyrics

Gallery

References

  1. ^ Sunset Western Garden Book, 1995:606–607
  2. ^ The Natural Communities of Virginia Classification of Ecological Community Groups (Version 2.3), Virginia Department of Conservation and Recreation, 2010
  3. ^ Schafale, M. P. and A. S. Weakley. 1990. Classification of the natural communities of North Carolina: third approximation. North Carolina Natural Heritage Program, North Carolina Division of Parks and Recreation.
  4. ^ a b Keeler, Harriet L. (1900). Our Native Trees and How to Identify Them. New York: Charles Scribner's Sons. pp. 192–194. 

External links


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Look at other dictionaries:

  • Oxydendrum —   Oxidendro …   Wikipedia Español

  • Oxydendrum — Sauerbaum Sauerbaum (Oxydendrum arboreum) Systematik Ordnung: Heidekrautartige (Ericales) Fam …   Deutsch Wikipedia

  • Oxydendrum — noun sourwood • Syn: ↑genus Oxydendrum • Hypernyms: ↑dilleniid dicot genus • Member Holonyms: ↑Ericaceae, ↑family Ericaceae, ↑heath family …   Useful english dictionary

  • Oxydendrum — ID 58504 Symbol Key OXYDE Common Name sourwood Family Ericaceae Category Dicot Division Magnoliophyta US Nativity N/A US/NA Plant Yes State Distribution AL, AR, FL, GA, IL, IN, KY, LA, MD, MS, NC, NY, OH, PA, RI, SC, TN, VA, WV Growth Habit …   USDA Plant Characteristics

  • Oxydendrum arboreum — Sauerbaum Sauerbaum (Oxydendrum arboreum) Systematik Ordnung: Heidekrautartige (Ericales) Fam …   Deutsch Wikipedia

  • Oxydendrum arboreum — krūminis rūgštūnis statusas T sritis vardynas apibrėžtis Erikinių šeimos dekoratyvinis, medingas augalas (Oxydendrum arboreum), paplitęs Šiaurės Amerikoje. atitikmenys: lot. Oxydendrum arboreum angl. sorreltree; sourwood šaltinis Valstybinės… …   Lithuanian dictionary (lietuvių žodynas)

  • Oxydendrum arboreum — noun deciduous shrubby tree of eastern North America having deeply fissured bark and sprays of small fragrant white flowers and sour tasting leaves • Syn: ↑sorrel tree, ↑sourwood, ↑titi • Hypernyms: ↑angiospermous tree, ↑flowering tree • Member… …   Useful english dictionary

  • Oxydendrum arboreum — Sorrel Sor rel, n. [F. surelle, fr. sur sour, fr. OHG. s?r sour. See {Sour}.] (Bot.) One of various plants having a sour juice; especially, a plant of the genus {Rumex}, as {Rumex Acetosa}, {Rumex Acetosella}, etc. [1913 Webster] {Mountain… …   The Collaborative International Dictionary of English

  • Oxydendrum arboreum — ID 58505 Symbol Key OXAR Common Name sourwood Family Ericaceae Category Dicot Division Magnoliophyta US Nativity Native to U.S. US/NA Plant Yes State Distribution AL, AR, FL, GA, IL, IN, KY, LA, MD, MS, NC, NY, OH, PA, RI, SC, TN, VA, WV Growth… …   USDA Plant Characteristics

  • Oxydendrum DC. — Symbol OXYDE Common Name sourwood Botanical Family Ericaceae …   Scientific plant list

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