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Sangeeta Gupta , Vishakha Saxena

Abstract

Perforated ray cells are reported in 17 species belonging to the six families of the order Celastrales, viz, Celastraceae, Hippocrateaceae, Salvadoraceae, Aquifoliaceae, Jcacinaceae and Dichapetalaceae. These perforated ray cells have simple perforations in 15 species while scalariform perforation plate were observed in 2 species, viz., Ilex denticulata Wallich ex Wight, and Ilex insignis Hook.f. The perforated ray cells were found located at the end of both uniseriate as well as multiseriate rays.

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Vishakha Saxena , Sangeeta Gupta

Abstract

The present study deals with the detailed wood microstructure of the genus Maytenus Molina (syn. Gymnosporia W. & A.) belonging to the family Celastraceae. Five species of Maytenus has been described on the basis of their detailed microstructure, salient diagnostic features and photomicrographs. An identification key based on anatomical features has been developed for the separation of the species of this genus. According to the present study M. emarginata (Willd.) DingHou and M. senegelensis (lam.) Exell could not be separated due to the same anatomy. This study is the first record of the wood microstructure of this genus. The correlation between selected wood anatomical features (qualitative and quantitative) and vegetation type (tropical and temperate) has been discussed in this paper. Inverse relationship was observed between vessel diameter and vessel frequency indicating conductive efficiency of this genus. Positive relationship between vessel frequency and vessel length was observed in tropical species while inverse relationship in temperate species. F/V and L/D ratios were found to be inversely correlated.

Keywords

Celastraceae, Maytenus, Wood Anatomy, Ecology

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Sangeeta Gupta , Vishakha Saxena

Abstract

The order Oxalidales has been divided into 6 families, out of these 2 families are represented in India viz. Elaeocarpaceae and Oxalidaceae. The present study deals with detailed wood microstructure of both families. 18 species and 2 genera of the family Elaeocarpaceae and single species belonging to single genus of the family Oxalidaceae have been described for their detailed wood microstructure, salient diagnostic features and photomicrographs. Wood anatomical studies also support the grouping of both the families together.

Keywords

Oxalidales, Elaeocarpaceae, Oxalidaceae, Wood Anatomy, India

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