The Family Zygophyllaceae in the province of Santa Fe (Argentina)

MCCARGO, J.C.; R.C.A. GARCÍA; D.E. PRADO

Rosario

Congreso; XXIV Reunión Anual, Sociedad de Biología de Rosario, 2004; 2005

Sociedad de Biología de Rosario

The Zygophyllaceae, in the Order Geraniales, is a pantropical family of over 25 genera and 250 species. It comprises herbaceous, shrubby or arboreal plants with opposite stipulate leaves, perfect tetra- or pentamerous flowers, solitary or in pauci-flowered cymes. The object of the present contribution is to set off the taxonomical study of the family for Santa Fe, through observation in the field, analysis of plant collections (Herbaria SF, SI and UNR) and revision of the literature. Seven genera and 16 species are known to occur in Argentina, of which only three genera are present in Santa Fe. These are the genera Kallstroemia Scop., with the small herbaceous K. tucumanensis Descole, O’Donell & Lourteig found only in the Dpt. 9 de Julio; Porlieria Ruiz & Pav. known only through the presence in the Dpts. 9 de Julio and Vera of the shrub P. microphylla (Baill.) Descole, O’Donell & Lourteig; and in the genus Tribulus L. the ‘roseta’ T. terrestris L. has been collected, appearing in Santa Fe in areas under high anthropic activity and intensive cultivation.