A new species of Merostachys (Poaceae, Bambusoideae, Bambuseae) and synopsis of the genus in Argentina and neighbouring regions

LIZARAZU, M. A.; RÚGOLO DE AGRASAR, Z. E; VEGA, A. S.

SYSTEMATIC BOTANY

AMER SOC PLANT TAXONOMISTS

Lugar: Wyoming, Laramie, USA; Año: 2011 vol. 36 p. 896 - 906

0363-6445

Abstract— A new species of Merostachys from Yungas of Bolivia, Merostachys yungasensis, is described and illustrated. Merostachys yungasensis is compared to other taxa distributed in Argentina, Bolivia, Paraguay, and Peru, in a table based on morphological characters. Additional micromorphological characters of leaf-blade and cauline epidermis are included. In Argentina are confirmed two species: M. clausenii and M. multiramea, the last species constitutes a new report for this country and is excluded from Paraguay. The specific epithet of M. clausenii, is emended, and the lectotype is here designed. A new synonym is recognized for M. clausenii and its presence is confirmed from Paraguay after an analysis of previous reports based on misidentifications. The taxa are illustrated. A key for the identification of the species, based on vegetative and reproductive characters, is also provided.