Ornamental and landscape plasticity and potential of Glandularia peruviana (L.) Small

L. Dall¿Agnese, C. Petry, E.C. Bortoluzzi, F.A.A.L. Backes, B.I. Antonello
Assessment of native species for use in landscaping requires identifying potential species and characterizing their landscape potential. The species Glandularia peruviana (L.) Small (Peruvian verbena) is native to Rio Grande do Sul and appears inroad margins, wasteland lots, and native-grass pastures. The Peruvian Verbena is distinguished from other species of its genus by the size and color of its flowers. This study aimed to evaluate the plasticity and ornamental potential of the species by comparing growth and flowering Peruvian Verbena with those of a plant (Verbena hybrida) already commercially diffused in flower beds. In addition, the study assessed behavior of the plants when rock dust was added to the soil as an organic source of plant nutrition. The experiment was conducted in the Extension and Research Center of the University of Passo Fundo, from March 2014 to January 2015. It analyzed the stem growth, plant diameter, and number of inflorescences at 34 and 120 days post-planting. In addition, after 300 days, it assessed number of flowers per inflorescence and average flower diameter. Results showed no verified effect of using rock powder on any parameter, and the number of inflorescences did not differ between G. peruviana and V. hybrida. At 34 days, V. hybrida showed greater plant diameter, but at 120 days, plant diameters were similar and G. peruviana had larger stem growth. The number of flowers per inflorescence did not differ between species; however, V. hybrida flowers were larger. The study shows the significant landscape potential of Peruvian Verbena for use in flower beds and plant borders, since the plant has growth parameters similar to those of commercial species and the undeniable beauty and hardiness common to indigenous species.
Dall¿Agnese, L., Petry, C., Bortoluzzi, E.C., Backes, F.A.A.L. and Antonello, B.I. (2017). Ornamental and landscape plasticity and potential of Glandularia peruviana (L.) Small. Acta Hortic. 1189, 167-170
DOI: 10.17660/ActaHortic.2017.1189.33
landscaping, plant bed, Peruvian verbena, rock powder, Verbenaceae

Acta Horticulturae