## 4 Discussion
In accordance with nutritional recommendations, the most needed microelements are Fe, Zn, Cu, and Mn. In this work, the variation between samples of different geographical origins ranged from 2.75 to 4.06, 3.08 to 5.64, 0.52 to 0.99, and 1.09 to 2.54 mg 100 g\({}^{-1}\), respectively; for _A. salmiana_, [PERSON] et al. [46] reported values of 8.66, 4.66, 0.65, and 2.94 mg 100 g\({}^{-1}\); and for _A. americana_, [PERSON] and [PERSON] [35] reported values of 7.7, 4.9, 0.3, and 1.1 mg 100 g\({}^{-1}\) for the same list of elements. The concentrations of Fe reported by [PERSON] and [PERSON] [1] for _A. salmiana_ and [PERSON] et al. [44] for _A. atrovirens_ were 8.92 and 0.90 mg 100 g\({}^{-1}\), respectively. These reports reveal high variability in the concentrations of each micromineral due to growth conditions and probable differences between and within species and/or genotypes; however, the ontogenetic effect and metabolic capacity of extraction, translocation, and accumulation in plants under different stress conditions to which the plants are exposed annually for the production of the floral scope cannot be ruled out. The yellow infloresences and flowers of _D. americana_ give a special color to the backyards of houses or roadsides, where they usually grow naturally or are planted. From December to the first months of the year, these flowers are marketed in almost all the traditional markets of Valles Centrales and Sierra Sur of Oaxaca, Mexico, where they compete regionally for sale or consumption with runner bean or ayocote flowers (_Phaseolus coccineus_ L.). Owing to their attractive characteristics and aroma, the infloresences are thought to contain many bioactive compounds [26], but they are only consumed by families with traditional local food cultures in the region of Oaxaca and southern Mexico. The results revealed significant differences in macroelements in the _D. americana_ samples from different geographic locations, and the macroelements were ordered from highest to lowest as P \(>\) Ca \(>\) Mg \(>\) K \(>\) S \(>\) Na, varying from 505.6 to 702.1, 243.6 to 608.0, 259.4 to 346.2, 199.1 to 258.9, 130.3 to 203.1, and 1.3 to 7.7 mg 100 g\({}^{-1}\), respectively. [PERSON] et al. [31] compared the macroelement contents of eight species of leaf quelites from the Sierra Norte of Oaxaca and reported the following variations: 65.96 to 500.99, 255.7 to 2418.6, 348.4 to 1021.8, 1467.2 to 4097.3, and 4.4 to 88.5 mg 100 g\({}^{-1}\) in P, Ca, Mg, K, and Na contents, respectively. [PERSON] and [PERSON] [47], in 22 species of leaf quelites, reported variations from 332.6 to 3717.3, 1165.9 to 6733.5, and 157.6 to 600.3 mg 100 g\({}^{-1}\) in Ca, K, and Mg, respectively. These different patterns of variation recorded in the current study for the flowers of _D. americana_ and those for species of leaf quelites (edible leaves) suggest that both sources contribute P, Ca, K, and Mg to the diet, and the differences in the concentrations of each macroelement are due, in part, to the environmental effects of plant growth, species or genotypes and interactions of species/genotypes and the environment. [PERSON] et al. [23] obtained samples of _D. americana_ from the local markets of Zimtalan de Alvarez and Villa de Zaachila in the Valles Centrales of Oaxaca, Mexico. They reported average Ca and Mg contents of 344.88 and 47.23 mg 100 g\({}^{-1}\), respectively, which are higher values of Ca than those reported in the present work (243.6 mg 100 g\({}^{-1}\)) but lower values of Mg (259.4 mg 100 g\({}^{-1}\)). In both cases, different detection protocols and equipment were used; in the first case, an atomic absorption spectrophotometer was used, and in the second case, inductively coupled plasma-optical emission spectrometry (ICP-OES) was used, revealing differences in the sensitivity of the equipment, in addition to the inherent variations in samples, making objective comparisons difficult. However, both studies revealed some of the variability in the composition of macroelements in the infloresrescences of _D.