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Comprehensive Description

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Olneya tesota A. Gray, Mem. Am. Acad. II. 5: 328. 1855
A tree, 5-8 m. high; branches striate, densely canescent, subvelutinous; spines 5-10 mm. long, paired or solitary under the leaves, with brown or black tips; leaves 3-10 cm. long; leaflets 8-24, oblong or cuneate, rounded at the apex, 5-20 cm. long, densely canescent; racemes axillary, 3^5 cm. long; bracts minute, deciduous; calyx canescent, the tube 3-4 mm. long, the lobes oblong-ovate, 2.5-3 mm. long, abruptly acute; corolla yellow, nearly 1 cm. long; pod 4-6 cm. long, 9 mm. thick, canescent and glandular-hispid, with a broad stipe and a broad beak; seeds black, 8-9 mm. long and 6 mm. broad, shining.
Type locality: Table-lands on the Gila River, Arizona.
Distribution: Arizona to Southern California, Lower California, and Sonora.
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bibliographic citation
Per Axel Rydberg. 1919. (ROSALES); FABACEAE; PSORALEAE. North American flora. vol 24(1). New York Botanical Garden, New York, NY
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Physical Description

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Perennial, Trees, Shrubs, Woody throughout, Stems woody below, or from woody crown or caudex, Nodules present, Stems erect or ascending, Stems or branches arching, spreading or decumbent, Stems 1-2 m tall, Stems greater than 2 m tall, Trunk or stems armed with thorns, spines or prickles, Stems solid, Stems or young twigs sparsely to densely hairy, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules persistent, Stipules free, Stipules spinose or bristles, Leaves compound, Leaves odd pinnate, Leaves even pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 5-9, Leaves glabrous or nearly so, Inflorescences racemes, Inflorescence axillary, Bracts very small, absent or caducous, Flowers zygomorphic, Calyx 5-lobed, Calyx glabrous, Petals separate, Corolla papilionaceous, Petals clawed, Petals ochroleucous, cream colored, Petals pinkish to rose, Petals blue, lavander to purple, or violet, Petals bicolored or with red, purple or yellow streaks or spots, Banner petal suborbicular, broadly rounded, Banner petal auriculate, Keel tips obtuse or rounded, not beaked, Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Style terete, Fruit a legume, Fruit unilocular, Fruit tardily or weakly dehiscent, Fruit oblong or ellipsoidal, Fruit coriaceous or becoming woody, Fruit exserted from calyx, Fruit inflated or turgid, Fruit torulose or moniliform, strongly constricted between seeds, Fruit glabrous or glabrate, Fruit hairy, Fruit 1-seeded, Fruit 2-seeded, Fruit 3-10 seeded, Seeds ovoid to rounded in outlin e, Seed surface smooth, Seeds olive, brown, or black.
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Dr. David Bogler
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Missouri Botanical Garden
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Olneya

provided by wikipedia EN

Olneya tesota is a perennial flowering tree of the family Fabaceae, legumes (peas, beans, etc.), which is commonly known as ironwood, desert ironwood, or palo fierro in Spanish. It is the only species in the monotypic genus Olneya. This tree is part of the western Sonoran Desert complex in the Southwestern United States.

Description

The desert ironwood grows as a bush or tree, reaching heights of about 10 metres (33 feet) and average trunk diameters of about 60 centimetres (24 inches). Exceptionally, in larger protected washes it can reach greater height and a more massive trunk.

In younger trees, the bark is gray, shiny, and smooth; in older trees the bark is broken open. The tree is evergreen, but can lose its leaves if temperatures fall below 2 °C (36 °F). In continual drought conditions the leaves will be lost.

The leaves are bluish-green and pinnately compound. They are arranged on a petiole, 15 cm (6 in) long, with 6–9 leaflets (or variously up to 15, with 7 opposite and one terminal), each measuring 0.7 to 2.5 cm (14 to 1 in). At the base of each pinnate leaf petiole grow two thorns, each about 1 cm (38 in) long.

Bloom time occurs in late April/May to June. Flowers are of 5 unequal petals, in colors of medium purple, magenta-red, or white to pale pink. Seedpods are 5–8 cm (2–3 in) long and light reddish brown when seedpods have ripened.

Two other species, Parkinsonia florida (blue palo verde) and Acacia constricta (catclaw acacia), have similar light red/brownish seedpods. Catclaw acacia's seedpods are shorter and J-shaped.

Taxonomy

The genus name of Olneya is in honour of Stephen Thayer Olney (1812–1878), who was an American manufacturer and botanist with expertise in the genus Carex.[3][4]

The genus was circumscribed by Asa Gray in Pl. Nov. Thurb. page 328 in 1854.[2]

Distribution and habitat

The species is native to the Southwestern United States and extreme northwestern Mexico in the Baja California Peninsula and the Sonoran Desert. Within Mexico its range includes the states of Baja California Sur and Baja California, on the Gulf of California side east of the cordillera ranges, and Sonora state west of the Sierra Madre Occidental cordillera, in the south approaching the northern border of northern Sinaloa state. In the Southwestern US its range includes the Colorado Desert of southeast Southern California, a part of the Sonoran Desert, and western and southern Arizona.[2] Olneya does not range into the higher-elevation, colder, southeast of Arizona's Sonoran Desert region, nor into the sky islands of the Madrean Sky Islands region.

Ecology

The pleasant-tasting sap is consumed by bees and hummingbirds. The silky-flycatcher or phainopepla pose a problem, for when they consume mistletoe berries and excrete them in the cracks of Olneya tesota, the mistletoe will parasitize its host.[5]

An indicator species

Olneya tesota is an indicator species of the Sonoran Desert region.[6] The Sonoran Desert has one other species with the identical north–south, and east–west range. The seasonally migrating lesser long-nosed bat follows the bloom season of various species from south to north and extends into the same regions of the Sonoran Desert as Olneya. The bat ranges from southern Baja California del Sur and north into the Southwestern US.[7]

In the north, both species define the Colorado Desert sub-region of the Sonoran Desert surrounding the northern end of the Gulf of California; further south in the Baja Peninsula the sub-division is defined as the Vizcaino Desert.

The winter and permanent range of the bat extend into the northern countries of Central America.

Uses

The seeds can be eaten by first being roasted.[8]

Olneya ironwood is very hard and heavy. Its density is greater than water and thus sinks; it does not float downstream in washes and must be moved by current motion.

Due to its considerable hardness, processing desert ironwood is difficult. Final treatment of the wood with solutions can also be difficult because of its high density. As a result, mass processing of this wood is difficult, and most of its commercial usages are artisanal, such as durable wooden sculptures as well as knife handles.

Culture

Ironwood Forest National Monument in south-central Arizona is named for O. tesota.

See also

References

  1. ^ "Olneya tesota". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 2009-10-13.
  2. ^ a b c "Olneya A.Gray | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 1 September 2022.
  3. ^ Quattrocchi, Umberto (2016). CRC world dictionary of medicinal and poisonous plants : common names, scientific names, eponyms, synonyms, and etymology. CRC Press. ISBN 9781482250640.
  4. ^ Burkhardt, Lotte (2022). Eine Enzyklopädie zu eponymischen Pflanzennamen [Encyclopedia of eponymic plant names] (pdf) (in German). Berlin: Botanic Garden and Botanical Museum, Freie Universität Berlin. doi:10.3372/epolist2022. ISBN 978-3-946292-41-8. Retrieved January 27, 2022.
  5. ^ Peattie, Donald Culross (1953). A Natural History of Western Trees. New York: Bonanza Books. p. 587.
  6. ^ Little Jr., Elbert L. (1976). "Map 103, Olneya tesota". Atlas of United States Trees. Vol. 3 (Minor Western Hardwoods). US Government Printing Office. LCCN 79-653298. OCLC 4053799.
  7. ^ "Bat range, and article". Archived from the original on 2008-07-05. Retrieved 2010-01-22.
  8. ^ Little, Elbert L. (1994) [1980]. The Audubon Society Field Guide to North American Trees: Western Region (Chanticleer Press ed.). Knopf. p. 498. ISBN 0394507614.

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Olneya: Brief Summary

provided by wikipedia EN

Olneya tesota is a perennial flowering tree of the family Fabaceae, legumes (peas, beans, etc.), which is commonly known as ironwood, desert ironwood, or palo fierro in Spanish. It is the only species in the monotypic genus Olneya. This tree is part of the western Sonoran Desert complex in the Southwestern United States.

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