INVESTIGADORES
O'LEARY Nataly Cristina
artículos
Título:
Species delimitation in Lippia section Goniostachyum (Verbenaceae) using the Phylogenetic Species Concept
Autor/es:
O'LEARY, NATALY; DENHAM SILVIA; SALIMENA FATIMA; MÚLGURA MARÍA EMA
Revista:
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2012 vol. 170 p. 197 - 219
ISSN:
0024-4074
Resumen:
Lippia section Goniostachyum
comprises plants distinguished by its numerous axillary florescences (3-6, sometimes
up to 9) and floral bracts tetrastically arranged. Species of section Goniostachyum range in the Neotropics,
from Mexico to Northern Argentina. Delimitation of the species grouped
under Goniostachyum has remained unclear.
Forty one names exist under this section, but only ca. 8-10 names have been frequently
used. To resolve the taxonomy of this group a modified Population Aggregation
Analysis, based on phylogenetic species concept, was employed. As a result Goniostachyum is here circumscribed to
only four species, L. grata, L.
origanoides, L. sericeae and L.
stachyoides. These species are sustained by a different combination of three
characters, out of the 13 qualitative attributes analyzed: canescent sericeous
pubescence, frondose or frondose-bracteose inflorescences and free or fused
florescence apical bracts. Two varieties based on significant differences among
quantitative characters are recognized: L.
stachyoides var. stachyoides and L. stachyoides var. martiana, nov. comb. Fifteen lectotypifications and 3 neotypifications
are here proposed.