International Journal of Pharma and Bio Sciences
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10.22376/ijpbs.2019.10.1.p1-12
Volume 4 Issue 1
2013 (January - March)
CYPSELARMORPHOLOGY AND ANATOMY OF FIVE SPECIES OF THE TRIBE INULEAE- ASTERACEAE
The family Asteraceae is regarded as one of the most advanced family in dicotyledons byTakhtajan lessThan sup greaterThan 1 lessThan /sup greaterThan . The fruit of Asteraceae is technically termed as cypsela which is developed from bicarpellary,unilocular ovary. The fruit is basically non endospermous but it has one to two layers of endosperm at mature state.The detailed morphological and anatomical features of mature cypselas of 5 species under 3 genera ( lessThan i greaterThan Inula helenium, I. britannica, I. ensifolia, Pulicaria dysenterica, Telekia speciosa lessThan /i greaterThan ) of the tribe Inuleae have been studied. Special emphasis is given to the surface configuration, structure of surface hairs, stylopodium, carpopodium and pappus bristles of cypselas. Anatomical features also interesting. In all the studied species, anatomical features exhibit cellular variations. In lessThan i greaterThan Inula ensifolia ,Telekia speciosa lessThan /i greaterThan , lessThan i greaterThan Pulicaria dysenterica, I. britannica lessThan /i greaterThan ; epicarpic region containing calcium oxalate crystal. Crystal formation has an important taxonomic parameter. If crystal formation takes place; there is no phytomelanin layer. In remaining studied species, crystal formation has not been observed. A testal feature is also important taxonomically. In lessThan i greaterThan Inula ensifolia lessThan /i greaterThan , testa is biseriately arranged, in remaining studied species, testa is uniseriately arranged. In lessThan i greaterThan Pulicaria dysenterica, lessThan /i greaterThan endosperm is biseriately arranged, whereas in remaining studied species, endosperm is uniseriately arranged. It is found that the observed features have taxonomic applicability and on the basis of which an artificial key to the studied species is prepared for the identification.
BIDYUT KR.JANA, RADHARAMAN BAR AND SOBHAN KR. MUKHERJEE
Cypselar morphology, anatomy, Inuleae, Asteraceae
911-919