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Royal paulowniaRoyal paulownia
Royal paulownia (Paulownia tomentosa)

Family: Scrophulariaceae

Common names: Arbol de la emperatriz, Blue catalpa, Empress tree, Foxglove tree, Kiri, Paulonia real, Princess tree, Royal paulownia, Shima giri

Distributed in: Argentina, Brazil, China, Japan, Korea-North, Korea-South, United States (Latin America, North America, Oceania and S.E. Asia)

Distribution overview: The species is indigenous to China and Japan, but it has been successfully cultivated in the United States. It has escaped, and can now be found from southern New York, southward to Florida and Texas, and extends northward into Arkansas and Oklahoma. It is usually found growing in waste places, on roadsides and in open areas.

Common uses: Boxes and crates, Cabinetmaking, Flooring, Flooring: industrial heavy traffic, Furniture , Furniture, Musical instruments, Plywood, Pulp/Paper products, Specialty items, Tool handles, Veneer: decorative, Wooden shoes

Product sources: The species has very little commercial value in the US. Quantities are limited on the US market, except for very small projects such as undertaken by craftsmen. Price is almost in the same range as Black walnut since the whitish wood is being exported to the Orient, especially Japan, for furniture and other special uses, including sandals.

Environment profile: Status within its natural growth range has not been officially assessed

Tree size: Trunk diameter is 150-200 cm

Colors: the heart isReddish brown, Yellowand the sapwoodWhite, Yellow.The grain isStraight, the textureMedium coarse to coarseand the lusterMedium

Natural durability: Susceptible to insect attack, Very durable

Odor: No specific smell or taste

Silica Content: Likely to have significant impact on machining

Kiln Schedules: US=T11D5

Kiln Drying Rate: Naturally dries slowly

Drying Defects: Checking, Distortion

Ease of Drying: Thick Stock Requires Care

Comments: The tree is named for Anna Paulownia (1795-1865), of Russia, princess of the Netherlands, and ancestor of the present queen.

Blunting Effect: High to severe The wood dulls cutters because of silica

Boring: Fairly difficult to very difficult

Carving: Fairly Difficult to Very Difficult

Cutting Resistance: Saw teeth blunted rapidly and severely by some stock

Mortising: Fairly Difficult to Very Difficult

Moulding: Fairly Difficult to Very Difficult

Movement in Service: Fairly Difficult to Very Difficult

Nailing: Fairly Easy to Very Easy, Holds nails well

Planing: Responds well to hand and machine tools

Resistance to Abrasion: High

Response to hand tools: Responds well to hand tools

Routing recessing: Fairly Difficult to Very Difficult

Sanding: Fairly Easy to Very Easy

Screwing: Good screw holding properties, Good screwing properties; Turning: Fairly Difficult to Very Difficult

Painting: Very Good to Excellent; Polishing: Very Good to Excellent; Staining: Takes all types of finishes very well ; Varnishing: Very Good to Excellent;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 288 kg/m3
Bending Strength kg/cm2
Crushing Strength kg/cm2
Hardness kg
Impact Strength cm
Shearing Strength kg/cm2
Stiffness 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage %
Weight kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Density 18 lbs/ft3
Weight 18 15 lbs/ft3

Density (dry weight) = 15-22 lbs/cu. ft.

Brown, W.H.,1978,Timbers of the World, No.5 Philippines and Japan,TRADA, Red Booklet SeriesHoward, A.L.,1948,A Manual of Timbers of the World.,Macmillan & Co. Ltd. London 3rd ed.Kline, M. 1982. Paulownia tomentosa - Royal paulownia. In A Guide to Useful Woods of the World. Flynn Jr., J.H., Editor. King Philip Publishing Co., Portland, Maine. 1994. Page 260-261.Little, E.L. 1980. The Audubon Society Field Guide to North American Trees - Eastern Region. Published by Alfred A. Knopf, New York.Little, E.L. 1980. The Audubon Society Field Guide to North American Trees - Western Region. Published by Alfred A. Knopf, New York.Mangieri, H.G.,1970,Un arbol capaz de producir mayor volumen de madera en menor tiempo,paulownia tormentosa,Boletin Argentino Forestal 14(281) pp5-6
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