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Pollen:ovule ratio and its relationship with other floral traits in Papilionoideae (Leguminosae): an evaluation with Argentine species.
TLDR
The results demonstrate that P/O variability is determined by taxonomic position and pollination mechanism in this plant group. Expand
Generalised pollination system of Erythrina dominguezii (Fabaceae : Papilionoideae) involving hummingbirds, passerines and bees
TLDR
The results show that E.dominguezii has a generalised pollination system, which is similar to that of passerine and hummingbird pollination in Erythrina. Expand
Pollen morphology of Pachycereus weberi (Cactaceae): an evaluation of variation in pollen size
TLDR
The results show that pollen size must be used carefully as a taxonomic character and discuss the importance of sample size in descriptive studies of pollen and diverse meiotic abnormalities that may be implied by the high variation of pollen grain size for P. weberi. Expand
Flower orientation in Pachycereus weberi (Cactaceae): Effects on ovule production, seed production and seed weight
Abstract Few studies have determined the importance of orientation on flower reproductive success. Flower orientation may affect reproduction of Cactaceae; the interception of photosynthetic activeExpand
Post-pollination mechanisms in Nicotiana longiflora and N. plumbaginifolia: pollen tube growth rate, offspring paternity and hybridization
TLDR
Results suggest that in natural sympatric populations, interspecific crosses would likely lead to unidirectional hybridization with N. plumbaginifolia as the seed parent. Expand
Effect of flower orientation on the male and female traits of Myrtillocactus geometrizans (Cactaceae).
TLDR
These findings suggest that intra-individual variation in floral traits of M. geometrizans might be associated with different availability of resources in branches with contrasting orientation, and provide new evidence of the existence of a response to an orientation-dependent extrinsic gradient. Expand
Floral Visitors of Three Asteraceae Species in a Xeric Environment in Central Mexico
TLDR
The first three insect groups were sensitive to LVC, high temperature, and low humidity, whereas the last three tolerated those same environmental conditions. Expand
Mating systems in Nicotiana longiflora and N. plumbaginifolia: The effect of interspecific interactions
TLDR
Overall, this research strongly supports that interactions between N. longiflora and N. plumbaginifolia are occurring in sympatric natural populations at the present time. Expand
Floral traits and mating systems in sister species of Nicotiana: interpopulational variability and sympatry effects
TLDR
Corolla length was significantly negatively correlated with an increase in the percentage of self-seeds estimated by pollination treatments, and anther–stigma distance showed a positive correlation with selfing within N. longiflora, but not among N. plumbaginifolia populations. Expand
Anatomy of the reproductive structures of Stenanona flagelliflora (Annonaceae)
TLDR
The number of integumentary layers in the ovule and the presence of papillae on the style and stigma are novel characters in the Stenanona flagelliflora. Expand
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