WOOD ANATOMY OF TWO SPECIES OF THE GENUS Heterothalamus Lessing (ASTERACEAE) FROM RIO GRANDE DO SUL (BRAZIL)
DOI:
https://doi.org/10.5902/198050981820Keywords:
Asteraceae, Heterothalamus alienus, Heterothalamus rupestris, wood anatomy.Abstract
The present work describes the wood anatomy of Heterothalamus alienus and Heterothalamus rupestris (Astereae - Asteraceae), as part of the secondary xylem study in the named genus. For the two species it was recorded some features usually mentioned in the literature for the Asteraceae, as typically small vessels, grouped in a dendritic pattern, the presence of only simple perforation plates and of paratracheal parenchyma. Heterothalamus alienus shows spiral thickenings in the wood vessels and storied vasicentric axial parenchyma. Heterothalamus rupestris differs itself by the absence of spiral thickenings in wood vessels and by no storied axial parenchyma, in paratracheal vasicentric to unilateral patterns. Photomicrographs, quantitative data of anatomical features and a comparison between the two species of wood are also provided.
Downloads
References
REFERÊNCIAS BIBLIOGRÁFICAS
BARROSO, G. M. Sistemática de angiospermas do Brasil. Viçosa: Editora UFV, 1991. v.3.
CARLQUIST, S. Wood anatomy of Astereae (Compositae). Trop. Woods, v. 113, p.54-84, 1960.
COPANT. Comissão Panamericana de Normas Técnicas : descrição macroscópica, microscópica e geral da madeira – esquema I de recomendação. Colômbia, 1973. 19p. (COPANT 30).
DEBLE, L. P.; OLIVEIRA, A. S.; MARCHIORI, J. N. Heterothalamus rupestris, espécie nova de Asteraceae do Rio Grande do Sul. In: Ciência Florestal, Santa Maria, v. 13, n. 2, p. 1-5, 2003.
DUJARDIN, E. P. Eine neue holz-zellulosenfaerbung. Mikrokosmos, v. 53, p.94, 1964.
FREUND, H. Handbuch der Mikroskopie in der Technik. Frankfurt : Umschan Verlag, 1970. 379p.
IAWA. List of microscopic features for hardwood identification. IAWA Bullettin, Leiden, v. 10, n. 3, p. 219-332, 1989.
MARCHIORI, J. N. C. Estudo anatômico do xilema secundário de algumas espécies dos gêneros Acacia e Mimosa, nativas no Estado do Rio Grande do Sul. 1980. 186p. Dissertação (Mestrado em Engenharia Florestal) – Universidade Federal do Paraná, Curitiba, 1980.
MARCHIORI, J. N. C. ; BRUM, E. T. Anatomia da madeira do guamirim-facho, Calyptranthes concina DC. Ciência Rural, Santa Maria, v. 27, n. 2, p. 217-222, 1997.
METCALFE, C. R.; CHALK, L. Anatomy of the dicotyledons. Oxford : Clarendon Press, 1972. v.2..
RECORD, S. J; HESS, R. W. Timbers of The New World. New Haven: Yale University Press, 1949. 640p.
