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CCDB → Angiosperms → Rubiaceae → Mexotis → Houstonia gracilis Brandegee
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Houstonia gracilis Brandegee | Mexotis latifolia (M. Martens & Galeotti) Terrell & H. Rob. | 17 | IPCN online | Terrell, E. E., W. H. Lewis, H. Robinson, H. & J. W. Nowicke. 1986. Phylogenetic implications of diverse seed types, chromosome numbers, and pollen morphology in Houstonia (Rubiaceae). Amer. J. Bot. 73(1): 103–115. |