Orange maclura thornless (Maclura aurantiaca var. inermis)

Thornless Osage Orange Thornless Bowwood
Silhouette: T. Michael Keesey / License

Maclura aurantiaca var. inermis - Thornless Osage Orange Guide

This deciduous tree stands out due to its distinctive lack of thorns compared to the typical species. Originating from North America, it exhibits a robust growth habit and tolerates a wide range of soil conditions. Cultivators and land managers value it for windbreaks and hedge plantings.

Taxonomy

  • царство Plantae
  • division Tracheophytes (Vascular Plants)
  • subdivision Spermatophytes (Seed plants)
  • Angiosperms
  • mesangiosperms (Core angiosperms)
  • eudicots
  • Superrosids
  • rosids
  • order Rosales
  • family Moraceae
  • genus Maclura (Osage orange)
  • species Maclura pomifera (Osage Orange)
  • variety Maclura aurantiaca var. inermis (Orange maclura thornless)

Living Pulse

Morphology

The variety reaches heights of 10 to 15 meters, forming a dense, rounded canopy. Its leaves are alternate, ovate-lanceolate, and turn a bright yellow in autumn. The most distinguishing characteristic is the absence of spines on the branches, making it easier to handle than the parent species.

The plant is dioecious, producing small greenish flowers. Female trees bear large, spherical, yellow-green multiple fruits with a bumpy surface resembling citrus fruits.

Flowering season

Late spring to early summer

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Applications

The wood is extremely dense, durable, and resistant to decay, historically used for fence posts and tool handles. Windbreaks and erosion control barriers are frequently established using this variety due to its tough nature. The milky sap from the leaves and fruit contains compounds that have been studied for their insect-repellent properties.

Interesting facts

  • The species name 'inermis' means unarmed, directly referring to the lack of thorns.
  • Although the fruits look like large oranges, they are inedible to humans and most livestock.
  • Early settlers utilized the wood to make strong bows, hence its common name bowwood.

Geography of distribution

  • United States

Technical Information

External Databases: GBIF, POWO, Tropicos

See also

True Araucarias

True Araucarias

Araucaria sect. Araucaria

Araucaria sect. Araucaria is a botanical section of evergreen conifers native to South America. It …