CITESwoodID: descriptions, illustrations, identification and information retrieval

DELTA Home

H. G. Richter, K. Gembruch, G. Koch

Acosmium spp. (Lapachillo, Lapachín)

Nomenclature. Family: FABACEAE-FABOIDEAE. Other trade relevant species: see comments. Synonym(s): Sweetia spp., Leptolobium spp. Further trade and local names: Acosmium panamense: Cencerro, guayacán, huesito (MX); cocobolo, malvecino (PA); vera de água (VE); congrio (VE, CO); carboncillo (CR); billy webb (BZ); chichipate (HO, SV). Acosmium nitens: lapachín (BO); water groenhout, watra grin (SR); itaúbarana (BR), kamarakata (GY). Acosmium subelegans: lapachillo (AR). Acosmium dasycarpum: perobinha (BR). Code according to DIN EN 13556: none. Internal code: ACS.

CITES(EU) status of protection. Not protected.

Geographic distribution. Mexico and Central America to southern Brazil.

Growth rings, colour, grain, etc. Growth ring boundaries indistinct or absent. Heartwood basically brown; without streaks. Sapwood distinct from heartwood colour. Odour indistinct or absent. Wood heavy and hard. Interlocked grain present.

Hardwood vs softwood. Vessels (pores) present (= hardwood).

Vessels (pores). Wood diffuse-porous. Vessels (pores) arranged in no specific pattern; in multiples; commonly in short (2–3 vessels) radial rows. Vessels medium to large; few. Tyloses absent. Other deposits in heartwood vessels (pores) present, or absent (in case sapwood is mistaken for heartwood).

Axial parenchyma. Axial parenchyma present; banded (sporadical). Parenchyma bands exclusively marginal (or seemingly marginal); narrow. Other macroscopically visible types of axial parenchyma: vasicentric, aliform, and confluent (frequently also unilateral, i.e., forming semicircular hoods or caps only on one side of the vessel). Aliform parenchyma of the lozenge type.

Rays. Rays narrow. Large rays commonly less than 1 mm high.

Storied structure. Storied structure present. Tiers regular (horizontal or slightly inclined); 4 per axial millimetre.

Physical and chemical tests. Heartwood not fluorescent. Water extract not fluorescent; colourless to brown. Heartwood extractives not leachable by water. Ethanol extract fluorescent (weakly light blue); colourless to brown. Froth test negative. Splinter burns to full ash, or to partial ash; colour of ash white to grey.

Additional information. • acs.jpg. Wood surface, natural size.


The interactive key allows access to the character list, illustrations, full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting specified attributes, summaries of attributes within groups of taxa, and geographical distribution.

Cite this publication as: ‘Richter, H.G., Gembruch, K., and Koch, G. 2014 onwards. CITESwoodID: descriptions, illustrations, identification, and information retrieval. In English, French, German, and Spanish. Version: 16th May 2014. delta-intkey.com’.

Contents