Yucca carrii, a new species from the northern Gulf Coastal Prairie of Texas is described. Morphology indicates that carrii belongs to Section Chaenocarpa (the dry-fruited yuccas). A lack observed fruit production date and reduced pollen viability this may be hybrid origin. The sole pollinator, yucca moth, has not been documented within species' range; it extirpated. Although known few populatio...

The genus Polianthes belongs to the subfamily Agavoideae of the Asparagaceae family formerly known as Agavaceae. The genus is endemic to México and comprises about 15 species, among them is Polianthes tuberosa L. The aim of this work was to study and characterize the embryo sac and early embryo development of this species in order to generate basic knowledge for its use in taxonomy, in vitro fe...

Homoisoflavonoids, a special subclass of flavonoids, are rarely found in nature, mainly existing in Fabaceae and Asparagaceae families and being less common in Polygonaceae, Portulacaceae, Orchidaceae, and Gentianaceae families. Until now, approximately 240 natural occurring homoisoflavonoids have been identified from roots, barks, heartwood, bulbs, leaves, and seeds of the plants from the abov...

Polyploidy and hybridization play an important role in plant diversification and speciation. The application of genomic in situ hybridization (GISH) allows the identification of parental genomes in hybrids, thus elucidating their origins and allowing for analysis of their genomic evolution. The performance of GISH depends on the similarity of the parental genomes and on the age of hybrids. Here...

UNLABELLED PREMISE OF THE STUDY Utah agave (Agave utahensis) and its putative subspecies, A. utahensis subsp. kaibabensis and A. utahensis subsp. utahensis, are keystone species of the Mojave Desert and Colorado Plateau in the southwestern United States. Here we developed microsatellite markers to study population structure and genetic diversity of the two subspecies of A. utahensis. • MET...

Highly coevolved pollination mutualism accompanied by reciprocal diversification has been known in only two plant genera, Ficus (Moraceae) and Yucca (Agavaceae), which are pollinated exclusively by obligate seed-parasitic wasps and moths, respectively. An additional, highly diversified, species-specific pollination mutualism between a monoecious tree genus, Glochidion (Euphorbiaceae), and a mot...