Fig. 2
From: Chromosome numbers of populations of three varieties of Bidens pilosa in Taiwan
Sampling sites of the three varieties of Bidens pilosa in Taiwan. Achenes used in chromosome numbers experiment were collected from six populations of B. pilosa var. minor (filled triangle), five populations of var. pilosa (filled square), and eight populations of var. radiata (filled circle). The altitude, longitude and latitude of these 19 sampling sites were also listed. Achenes used in hand pollination experiment were collected from populations of the three varieties growing sympatrically in Chiayi (filled star) (120°37′E, 23°26′N, 500 m a.s.l.)