| Signatura:||Biblioteca OET: M. NBINA-9317. |
| Autor:|| Gentry, Alwyn Howard. |
| Dirección:|| Missouri Botanical Garden, P.O. Box 299, St. Louis, MO 63166-0299, US. |
| Título: ||
Evolutionary patterns in neotropical Bignoniaceae. |
| P.imprenta: || v. 55, p. 118-129. Año 1990. |
| Serie: ||Memoirs of the New York Botanical Garden. |
| Notas: || (Dr. Alwyn H. Gentry deceased on August 3, 1993). |
| Descriptores:|| PLANTS; SPERMATOPHYTES; MAGNOLIOPHYTA; MAGNOLIOPSIDA. |
BIGNONIACEAE; POLLINATION STRATEGY; FLORAL MORPHOLOGY; PHENOLOGY.
LATIN AMERICA; COSTA RICA; CENTRAL AMERICA.
| Resumen: ||Neotropical Bignoniaceae are mostly self-incompatible, obligately outcrossing, have constant chromosome number (2n = 40) and show little evidence of hybridization in nature. The majority of species and genera are pollinated by large and middle-sized bees. Generic differentiation often involves changes in floral morphology or phenology associated with different pollination strategies. In Bignoniaceae of seasonally inundated habitats, specific differentiation is frequently associated with a change from wind to water dispersal. Otherwise species level differentiation mostly involves vegetative changes and is often associated with edaphic specialization. In the few genera like Tabebuia where there has been significant intrageneric radiation of floral morphology to adapt to different pollinators, most of the species with unusual pollinators tend to occur in depauperate habitats. Bignoniaceae evolutionary patterns appear to be compatible with classical zoological ideas of allopatric speciation and community saturation|