Introduction to the study of the Convolvulaceae Family in the Province of Santa Fe (Argentina) II

COLOMBO, V.; PEDRERO, E.; MOGNI, V.Y.; MATURO, H.M.; PRADO, D.E.; OAKLEY, L.J.

Rosario

Congreso; XLI Reunión de Biología de Rosario; 2021

Sociedad de Biología de Rosario

Historically, the Family Convolvulaceae has been classified in the order Tubiflorales according to its morphological features. According to the APG-IV classification, it is now placed within the order Solanales based on molecular criteria. It comprises prostrate, climber or erect herbaceous plants with alternate and simple leaves, entire or palmately-lobed. Flowers are actinomorphic, gamopetalous, pentamerous, grouped in cymose inflorescences. The fruit is a capsule with glabrous or hairy endospermic seeds. The aim of the present contribution is to continue with the taxonomic study of the family in Santa Fe. We carried out a bibliographical review and consulted national herbaria with important collections of the province (SF; SI; UNR); fieldwork experience of the authors and lab work were used to validate the specimens’ identity. The preliminary results show that the Convolvulaceae family is represented in the province by seven genera. These are: Ipomoea L. (treated in a previous contribution); Aniseia Choisy, with A. argentina (N.E. Br.) O’Donell; Cressa L., with Cr. truxillensis Kunth; Distimake Raf., with D. dissectus (Jacq.) Simões & Staples var. dissectus; Dichondra J.R. Forst. & G. Forst. with D. microcalyx (Hallier f.) Fabris and D. sericea Sw. var. sericea; Evolvulus L. with E. arizonicus A. Gray and E. sericeus Sw. var. sericeus; and Convolvulus L., with C. crenatifolius Ruiz & Pav. subsp. crenatifolius, C. hermanniae L’Hér. subsp. hermanniae, C. laciniatus Desr., and the adventitious and crop weed C. arvensis L. A species distribution map, botanical descriptions and ilustrations for each taxon and a key for genera field recognition are provided.