different between bigeneric vs biogeneric

English

bi- +? generic

bigeneric (not comparable)

(botany) Describing an (infertile) cross between plants belonging to different genera.
- 1934, Rex Stout, Fer-de-Lance, 1992 Bantam edition, ?ISBN, page 93:
  It's a bigeneric hybrid, they don't come in nature like that.
(taxonomy) Describing a taxonomic group containing only two genera.

bio- +? generic

biogeneric (plural biogenerics)

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