Se describe Heliopsis suffruticosa de la Sierra de Sombrerete al occidente de Zacatecas, de bosque bajo abierto de piñonero sobre caliza. La especie difiere de otras del género por tener hábito sufruticoso, hojas angostamente lanceoladas a lineares, enteras a espaciadamente serruladas y pedúnculo gradualmente ensanchado hacia el ápice, características que comparte con algunas especies de Zinnia. Se presenta una clave para distinguir entre las especies mexicanas de hábito perenne de Heliopsis. Al igual que en otros representantes de este género, las raíces de H. suffruticosa presentan alcamidas, detectándose en este caso cinco isobutil alcamidas diacetilénicas conjugadas, unidas a un metilo terminal en posición omega.

Irrigation using water treated with static magnetic field (SMF) has recently been used as a strategy to stimulate the growth and development of different plant species. The aim of this study was to characterize the bioactive compounds and evaluate the anatomical structure of Rosmarinus officinalis L. irrigated with SMF-treated water. Results demonstrate that the treatment promoted plant growth, the number of trichomes and increased concentrations of secondary metabolites. Methanolextracted leaves revealed that rosmarinic acid was detected in both experimental groups, without a difference in the level. Camphor, α-terpineol and verbenone were determined as the most abundant compounds present in these leaf extracts and were strongly increased in plants irrigated with SMF-treated water. Similar results were also observed for endo-borneol, bornyl acetate and β-amyrin concentrations.Taken together, these results indicate that irrigation with SMF-treated water can be used to improve the production of rosemary to obtain pharmaceutical products with an increased antioxidative activity.

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