Variasi morfologis Bidens di Kota Semarang berdasarkan ketinggian tempat

Abstract

Bidens is a group in Asteraceae that are separated in Semarang and have morphological variations at different altitudes. This this reseacrh uses samples of Bidens from five locations of Semarang that is Sawah Besar Subdistrict, Area of Banjir Kanal Timur,  Gunungpati District, Tembalang District and  Area of Pudak Payung. The purpose of this study is to determine the diversity of Bidens in Semarang based on morphological variations. The method in this research are colletion of Bidens sample, characterization, qulitative analysis to make description. The result of this research showed that in Semarang, species of Bidens was identified as one, that is Bidens pilosa. The samples used for grouping analysis was 15 samples. Characterization using 68 traits, 43 traits showes variation in samples. Morphological variations were shown in leaf size, leaf shape, leaf tip shape, leaf base shape, variation in capitula location, number of capitula flower size and number of pappus. There are 25 traits that do not vary or have the same character including leaf surface, leaf edge, ligula color, achene color and achene shape. From the research results, it can be concluded that the morphological variations of Bidens in the city of Semarang do not vary based on differences in environmental conditions in the city of Semarang.