ĐẶC ĐIỂM THỰC VẬT HỌC CÂY TRÂM SƠRI (EUGENIA UNIFLORA L.) - HỌ SIM (MYRTACEAE)

Abstract

Background: Eugenia uniflora L. is a species introduced to Vietnam. Leaves are used as diuretics in Brazil and Surinam; the fruit is used as an antihypertensive in Java. Morphological and microbiological characteristics are the basis to distinguish E. uniflora L.. However, not many documents related to morphology and anatomy of species have been recorded or studied in Vietnam. Objectives:  Researching morphological and microbiological characteristics of E. uniflora L. to contribute to the identification. Materials and method: E. uniflora L. fresh plants are collected in Can Tho City in 2019. Describing, photographing the morphological characteristics. Stem, leaf and petiole with a razor, staining microsurgery with carmine alum and green dye iodine, describing, photographing the anatomical characteristics; observing traditional powder. Results: Morphological characteristics: Tree. Leaves simple, alternate, no stipule. Flowers regular, bisexual, 4 merous. Calyx agglutinate, grow with fruit. Corolla polypetalous. Stamens monadephous, irregular. Carpels 2, ovary inferior, 2-locular. Fruit berry. Anatomy: The pericycle form fibers group, the midrib is 1,5-2 times thicker the leaf blade, xylem and phloem form arc shape and are surrounded by fibers, the palisade parenchyma is 1 layer; internal phloem present and crystals of calcium oxalate  in stem and leaf anatomy. Leaf powder: Lower epidermis with stoma type paracytic, fiber, crystals of calcium oxalate. Fruit powder: Fiber, crystals of calcium oxalate. Conclusion: The morphological and anatomical characteristics of E. uniflora L. help to identify its species more exactly.