There are 490 pages with 4897 entries

Results
 Family  Genus  Specific epithet  Ploidy level  Chromosome number  Bs range  Complete citation reference
Acanthaceae Justica lanceolata 2,00 28 1 Lewis, H., Stripling, H. L., & Ross, R. G. (1962). Chromosome numbers for some angiosperms of the Southern United States and Mexico. Rhodora, 65, 147–161.
Acanthaceae Justica gendarussa 2,00 30 1-2 Raghuvanshi, S. S., & Rastogi, S. L. (1968). Acanthaceae I. Accessories in Justica gendarussa. Current Science, 37(14), 416–416.
Aceraceae Acer villosum 2,00 26 1-2 Mehra, P. N. (1972). Cytogenetical evolution of hardwoods. Nucleus (Calcutta), 15(1), 64–83.
Aceraceae Acer villosum 2,00 26 1-2 Love, A. (1969). IOPB chromosome number reports XXII. Taxon, 18(4), 433–442
Acrididae Myrmeleotettix maculatus 2,00 18 1-3 Fox, D. P., Hewitt, G. M., & Hall, D. J. (1974). DNA replication and RNA transcription of euchromatic and heterochromatic chromosome regions during grasshopper meiosis. Chromosoma, 45(1), 43–62.
Acrididae Myrmeleotettix maculatus 2,00 18 Bs Wilmore, P. J., & Brown, A. K. (1975). Molecular properties of orthopteran DNA. Chromosoma, 51(4), 337–345
Acrididae Trixallis nasuta 2,00 23 1-2 Minouchi, O. (1934). Uber die uberzahligen chromosomen der Orthopteran. I. Uber die uberzahligen chromosomen in der spermatogenese von Trixalis nasuta. Zeitschrift Für Zellforschung Und Mikroskopische Anatomie, 20, 709–729
Acrididae Eyprepocnemis plorans 2,00 24 1-3 Abdelaziz, M., Teruel, M., Chobanov, D., Camacho, J. P. M., & Cabrero, J. (2007). Physical mapping of rDNA and satDNA in A and B chromosomes of the grasshopper Eyprepocnemis plorans from a Greek population. Cytogenetic and Genome Research, 119(1–2)
Acrididae Myrmeleotettix maculatus 2,00 18 1-4 Robinson, P. M., & Hewitt, G. M. (1976). Annual cycles in the incidence of B chromosomes in the grasshopper Myrmeleotettix maculatus (Acrididae:Orthoptera). Heredity, 36(3), 399–412.
Acrididae Myrmeleotettix maculatus 2,00 18 1-3 Hewitt, G. M. (1976). Meiotic drive for B-chromosomes in the primary oocytes of Myrmekotettix maculatus (Orthoptera: Acrididae). Chromosoma, 56(4), 381–391

B-chrom database 2017