São microscopicamente descritos os lenhos de Mimosa parvipinna Benth. e Mimosa ramulosa Benth. Ambas as espécies apresentam porosidade difusa, placas de perfuração simples, pontoações arredondadas, alternas e ornamentadas, parênquima paratraqueal, fibras libriformes, cristais romboédricos no contato parênquima/fibras e raios heterogêneos. Mimosa parvipinna separa-se facilmente de Mimosa ramulosa por ter raios mais estreitos e baixos em número de células.
We have studied the floristic composition and phytosocyological struture of the Osório Hill, Osório town, in the littoral of Rio Grande do Sul (RS), from the data collected in a forest inventory, with 10 sample units of 10 x 100m in area for trees with CBH > = 45cm, each one having two circular concentric sub-samples, one of these with 10m2 (radius = 1.78m) and other with 100m2 (radius = 5.64m) for natural regeneration analysis in the classes from 0 to 15 to 45cm of CBH, respectively. We have identifies 65 species belonging to 58 genii of 30 botanic families. Allophylus edulis (St. Hil.) Radlk., Cabralea canjerana (Vell.) Mart., Cupania vernalis Camb., Erythryna falcata Benth., Inga marginata Willd., Luehea divaricata Mart., Nectandra megapotamica (Spreng.) Mez., Pachystroma longifolium (Nees.) I. M. Johnston., Trema micrantha (L.) Blume. e Trichilia clausseni: C. DC. are between the most distinguished species.
O lenho de Mimosa pigra é anatomicamente descrito e ilustrado com fotomicrografias, sendo sua estrutura comparada com a de espécies de outros táxons infragenéricos.
INTRODUÇÃOParte de um projeto mais amplo e que tem o objetivo de investigar caracteres anatômicos de valor diagnóstico no lenho de distintos táxons infragenéricos de Mimosa L., a presente pesquisa trata da descrição microscópica da madeira de duas espécies da série Stipellares Benth. ABSTRACT.[Wood anatomy of two species of Mimosa from the series Stipellares Benth.].The woods of Mimosa barnebiana and Mimosa bifurca are anatomically described and illustrated with photomicrographs. The examination of anatomical structures from both woods and the comparison with other species from Stipellares series, listed in the literature, shows that pores in large multiples and in a distinct (or tending to) diagonal pattern (dendritic) is a feature common to all species from the group and, within genus Mimosa, observed only in species of that botanical series.
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