Biological diversity, Plant ecology, Analysis, Life Sciences, Plant Sciences, Endangered species, Plant Anatomy/Development, Isozymes, Plant Systematics/Taxonomy/Biogeography, Echium decaisnei, Echium onosmifolium subsp. spectabile, Echium callithyrsum, Mating systems, Echium acanthocarpum, Tajinaste, Echium onosmifolium, Isoenzymes