Fraxinus americana

White ash (Fraxinus americana) has been used as an internal wash and tea by several Indigenous cultures in eastern North America. Among the Cherokee of the southeastern United States, an infusion of the inner bark was drunk for sore throats and menstrual cramps, and also employed as a wash for skin ulcers (Bennett, 2012; Moerman, 1998). The Iroquois in the Northeast prepared a bark decoction for the same purpose, applying it as a wash to ulcers (Moerman, 1998). The Delaware also recorded an inner‑bark infusion for back pain (Moerman, 1998). These records consistently point to preparations made with the inner bark—rarely the leaves—and emphasize topical washes of ulcers alongside internal soothing of irritated mucous membranes.

A simple bark infusion for sore‑throat comfort can be made with 1–2 teaspoons (about 1–2 g) of dried inner bark and 8 oz (240 mL) of freshly boiled water. Cover and steep 10–15 minutes, then strain. Use no more than two cups daily for up to one week, and do not use during pregnancy or breastfeeding due to the presence of coumarins. People taking blood‑thinning medications should avoid or consult a clinician first (Miller, 1998; O’Neil et al., 2001). Because these preparations are topical as well as internal, store any remaining liquid in the refrigerator and discard after 24 hours.

The bark is rich in coumarins, notably esculin and fraxetin, as well as secoiridoid glucosides such as fraxin and related iridoids, and phenylethanoid glycosides like syringin. These constituents are well documented for the genus Fraxinus and provide plausible basis for the traditional astringent and soothing actions noted in mucosal irritation (Gertsch, 2011; Harborne and Baxter, 1993). The presence of coumarins also supports the cautionary notes above.

Today, white ash is not widely used as a standalone herbal product in North America, and most published research on Fraxinus species centers on related Eurasian taxa used in commercial cordials and bitters rather than on F. americana. The recorded uses remain important ethnobotanical documentation, reflecting a culture of careful bark harvest and multi‑purpose application by North American peoples (Moerman, 1998).

Common products:
White ash (Fraxinus americana) is a source of hardwood lumber and veneer used primarily in sporting goods (baseball bats, tennis rackets, hockey sticks), tool handles, broom and brush handles, and other turned or curved items that benefit from a combination of stiffness and resilience. The wood is also used for furniture, cabinets, and millwork (Harrington, 2018; USDA, 2022).

Industrial and craft applications:
Selected logs and logs with defects are converted to paper pulp in kraft and sulphite processes; ash pulp is valued for high alpha-cellulose and relatively low lignin compared with oak, producing strong paper (USDA, 1965). Ash is a traditional material for oars and paddles in boatbuilding (Edlin, 1951).

Food and beverages (non-medicinal):
No documented culinary uses specific to this species were identified in the cited references.

Colorants and tanning:
Bark of ash has been recorded as a source of tan in oak-bark tanning systems in Europe; Fraxinus americana and other Fraxinus species are included among contributors to tan supply in North America and Europe (USDA, 1929; Isenberg, 1964).

Wood and fiber:
Heartwood and sapwood have similar density; wood properties include high specific gravity, strength in bending and compression, good shock resistance, and favorable machining characteristics (USDA, 1965, 2022). These properties underpin use in sports equipment, tool handles, oars, and high-quality turned articles.

Fragrance and cosmetics:
No documented fragrance, essential oil, or cosmetic uses specific to this species were identified in the cited references.

Properties relevant to use:
High strength-to-weight ratio, stiffness, and shock resistance enable use in sporting goods. The relatively low lignin content and high alpha-cellulose favor pulp bleaching and strength properties in paper grades (USDA, 1965).

Standards and regulation:
Timber is graded under species-specific rules in North American standards (e.g., NHLA grading rules applied by species); ash is permitted under the ISPM 15 international wood packaging material standard for phytosanitary heat treatment (NHLA, 2017; FAO, 2018). Wood packaging movement is governed by national plant health regulations (e.g., USDA–APHIS in the U.S.).

Sustainability and sourcing:
All Fraxinus species in North America are threatened by emerald ash borer, causing severe declines in ash availability and altering stumpage markets (USDA, 2022). Regeneration and certification practices follow regional forestry standards (e.g., FSC/PEFC where applicable).

References:
Edlin, H. L. (1951). A Manual of Woodturning.
FAO (2018). ISPM 15: 2018 (Regulation of wood packaging material in international trade).
Harrington, C. A. (2018). Native trees of North America.
Isenberg, I. H. (1964). The Woodcraft Encyclopedia.
NHLA (2017). Rules for the Measurement and Inspection of Hardwood Lumber.
USDA (1929). Tannin Sources of the United States.
USDA (1965). Wood Handbook: Wood as an Engineering Material (Agricultural Handbook 72).
USDA (2022). Wood Handbook: Wood as an Engineering Material ( Centennial Edition).

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