Senecio pulcher

Abstract: The objectives of this work were to carry out an inventory of the flora of an area of the Sierra La Barrosa (Tandilia system, Buenos Aires), to value the agronomic potential of the species, and to begin an in situ preliminary study of the phenology of 10 native taxa of ornamental interest. The study was carried out in sites of the top and both sides of the Sierra. A database was constructed based on taxonomy, life-forms and agronomic uses. A total of 204 species were identified, belonging to 51 families and 135 genera. Of these, 70.6% are natives no endemics, 9.31% are endemics and 20.1% are exotics. The 76% of the species are perennial and hemicriptophytes (41.2%) are predominant. The 65% of the species has potential value as medicinal (21.5%), ornamental (25%) or forage (13.7%), and 13.2% are weeds or toxic plants. According to their ornamental potential (habit, foliage and floral attributes), Achyrocline satureioides, Eupatorium subhastatum, E. tanacetifolium, Hysterionica pinifolia, Senecio pulcher, Sommerfeltia spinulosa, Lathyrus pubescens, Mimosa rocae, Pavonia cymbalaria, and Gomphrena perennis were selected for the phenology study; species showed differences in the time and duration of flowering.