STUDY ON THE MORPHOLOGICAL CHARACTERISTICS OF SHAN TUYET ANCIENT TEA TREES IN DONG PHUC COMMUNE, THAI NGUYEN PROVINCE

Abstract

Shan Tuyet ancient tea trees in Dong Phuc commune exhibit vigorous growth, large woody stems, and broad canopies. Branching occurs at heights ranging from 116.3 to 143.3 cm, with branch angles between 36.8° and 74.2°, and canopy forms varying from spreading to semi upright or upright. Stem circumference ranges from 67 to 117 cm, with medium branch density. Leaves measure 39.43 - 109.73 cm² in area, with rough lamina, shallow serrated margins, and green to light, medium or dark green coloration. Buds are light green, 8.6 - 13.4 cm in length, weighing 1.98 - 2.43 g, and covered with a moderate density of trichomes. Flowers bear 5 - 7 petals, white to pink in color, with diameters of 2.60  - 3.33 cm, and 67 - 108 stamens. Fruits are relatively small (1.82 - 2.49 cm), containing 2 - 4 seeds, with seed coats ranging from brown to dark brown and variable thickness. Several individuals (NB - 10, PP - 5, NB - 11) possess relatively larger leaves, suggesting higher photosynthetic potential. The observed morphological diversity among trees reflects underlying genetic variation and ecological adaptation, providing a valuable basis for conservation and sustainable utilization of Shan Tuyet genetic resources.