Peltogyne

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Peltogyne
Peltogyne paniculata Taub78b.png
Illustration of Peltogyne paniculata flowers
Scientific classification e
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Detarioideae
Tribe: Detarieae
Genus: Peltogyne
Vogel
Species

See text

Synonyms[1]
  • Orectospermum Schott

Peltogyne, commonly known as purpleheart, violet wood, amaranth and other local names (often referencing the colour of the wood) is a genus of 23 species of flowering plants in the family Fabaceae; native to tropical rainforests of Central and South America; from Guerrero, Mexico, through Central America, and as far as south-eastern Brazil.[2]

They are medium-sized to large trees growing to 30–50 m (100–160 ft) tall, with trunk diameters of up to 1.5 m (5 ft). The leaves are alternate, divided into a symmetrical pair of large leaflets 5–10 cm (2–4 in) long and 2–4 cm (1–2 in) broad. The flowers are small, with five white petals, produced in panicles. The fruit is a pod containing a single seed. The timber is desirable, but difficult to work.

Distribution[edit]

The species of the genus range from southeastern Brazil through northern South America, Panama, Costa Rica, and Trinidad, with the majority of species in the Amazon Basin. P. mexicana is a geographic outlier, native to the Mexican state of Guerrero.[3] Overharvesting has caused several species to become endangered in areas where they were once abundant.[4]

Wood[edit]

The trees are prized for their beautiful heartwood which, when cut, quickly turns from a light brown to a rich purple color. Exposure to ultraviolet (UV) light darkens the wood to a brown color with a slight hue of the original purple.[5] This effect can be minimized with a finish containing a UV inhibitor. The dry timber is very hard, stiff, and dense with a specific gravity of 0.86 (860 kg/m3 or 54 lb/cu ft). Purpleheart is correspondingly difficult to work with.[6] It is very durable and water-resistant.

Uses and hazards[edit]

Purpleheart is prized for use in fine inlay work especially on musical instruments, guitar fret boards (although rarely), woodturning, cabinetry, flooring, and furniture. It is also used in many hobby woodworking projects, such as bottle stoppers, pens, bowls, knife scales and jewelry boxes.[7] The timber is also valuable in applications that require toughness, such as truck decking.[8]

Purpleheart presents a number of challenges in the woodshop. Due to its hard-to-detect interlocking grain, hand-planing, chiseling and working with carving tools can prove trying. However, woodturners can note that with sharp tools, it turns cleanly, and sands well.[9]

Exposure to the dust generated by cutting and sanding purpleheart can cause skin, eye, and respiratory irritation and nausea,[10] possibly due to the presence of dalbergione (neoflavonoid) compounds in the wood. This also makes purpleheart wood unsuitable to most people for use in jewelry.[11] Purpleheart is also a fairly expensive wood, which is why it is usually used in smaller-scale projects.[12]

Species[edit]

The following list of species is according to Plants of the World Online.[13]

Gallery[edit]

References[edit]

  1. ^ R. C. Barneby (1983). "(711)-(712) Proposals to conserve Plathymenia against Echyrospermum and Peltogyne against Orectospermum (Leguminosae)". Taxon. 32 (3): 488–490. doi:10.2307/1221525. JSTOR 1221525.
  2. ^ Sotuyo, Solange. "El palo morado (Peltogyne mexicana), una leguminosa maderable con futuro incierto y parientes lejanos". Revista Digital Universitaria, Universidad Nacional Autónoma de Mexico. [1]
  3. ^ Sotuyo, Solange. "El palo morado (Peltogyne mexicana), una leguminosa maderable con futuro incierto y parientes lejanos". Revista Digital Universitaria, Universidad Nacional Autónoma de Mexico. [2] Accessed 25 April 2015.
  4. ^ "Purpleheart - Peltogyne - Madera Sudamerica -Consorcio forestal". Maderasdesudamerica.com.
  5. ^ "PURPLEHEART-PELTOGYNE".
  6. ^ Garnet Hall (February 2006). The Art of Intarsia: Projects & Patterns. Tamos Books, Incorporated. pp. 16–. ISBN 978-1-895569-75-9.
  7. ^ "WoodSense: Spotlight on Purpleheart". www.woodcraft.com. Retrieved 2021-07-01.
  8. ^ "Purpleheart Wood".
  9. ^ "WoodSense: Spotlight on Purpleheart". www.woodcraft.com. Retrieved 2021-07-01.
  10. ^ "WoodSense: Spotlight on Purpleheart". www.woodcraft.com. Retrieved 2021-07-01.
  11. ^ Peltogyne in BoDD – Botanical Dermatology Database
  12. ^ J. L. Atrops (1970). Strength Properties of Trinidadian Timbers. University of the West Indies.
  13. ^ Peltogyne in POWO; last accessed 10 April 2021
  • Media related to Peltogyne at Wikimedia Commons