FIGURE 5. Somatic chromosomes at metaphase of Begonia. A. B. abbreviata (2n = 30: NTH 5917); B. B. calciphila (2n = 30: Peng et al. 20226); C. B. sphenantheroides 2n = 22: Peng et al. 20216); D. B. tamdaoensis (2n = 18: Peng et al. 16638); B', C', D', somatic chromosomes serially arranged by chromosome length and centromere position. Scale bars: B', C'= 2 μm; D' = 5 μm. Large arrows indicate a pair of the largest metacentric chromosomes with secondary constrictions (SC) at interstitial regions of the long arms; medium arrows indicate metacentric chromosomes with SC at distal regions of the long arms. Small arrows, large arrowheads and small arrowheads indicate metacentric chromosomes, subtelocentric chromosomes and telocentric chromosomes, respectively.

Published as part of Peng, Ching-I, Yang, Hsun-An, Kono, Yoshiko, Jung, Ming-Jer & Nguyen, Tien Hiep, 2015, Four new species of Begonia (Begoniaceae) from Vietnam: B. abbreviata, B. calciphila, B. sphenantheroides and B. tamdaoensis, pp. 83-99 in Phytotaxa 222 (2) on page 88, DOI: 10.11646/phytotaxa.222.2.1, http://zenodo.org/record/13635511