Carolina Guerreiro

Culm anatomy: a contribution to the identification of vegetative Andean woody bamboos in southernmost America

SummarySix genera of woody bamboos (Poaceae, Bambusoideae, Bambuseae) occur along the Andes, but only two reach the southernmost portion of this mountain range, Chusquea Kunth and Rhipidocladum McClure. In woody bamboos, the identification of new anatomical characters bears a considerable taxonomic significance contributing to the determination of vegetative material. In the present work, culm anatomy of Andean woody bamboo species occurring in Argentina and neighbouring areas is described. Eight species are surveyed: C. culeou E. Desv., C. deficiens Parodi, C. lorentziana Griseb., C. montana Phil., C. quila Kunth, C. valdiviensis Phil., R. neumannii Sulekic, Rúgolo & L. G. Clark and R. racemiflorum (Steud.) McClure. Culm epidermal and cross sectional characters of each species are described and an identification key based on anatomical characters is provided. Culm anatomical characters of C. montana, C. quila and C. valdiviensis are presented for the first time. Also, anatomical evidence that support the idea of C. quila and C. valdiviensis as different species is presented and information on useful characters to distinguish between them is provided. The taxa studied are compared in tables based on culm anatomical characters of taxonomic value.

Two New Species of Chusquea subg. Magnifoliae (Poaceae, Bambusoideae, Chusqueinae) from Peru

Abstract The present paper describes and illustrates two new species of Chusquea subg. Magnifoliae in Peru, C. longipedicellata and C. rugoloana. Keys for the identification of species, based on vegetative and reproductive characters, as well as a comparative table with morphological diagnostic features are included. Additional micromorphological characters of the spikelets and leaves are considered, and a complete description of foliar anatomy is presented. Also, some remarks about the characteristics of the phytogeographical regions and the ecology of these new species are provided.

New records of Chusquea (Poaceae: Bambusoideae: Bambuseae) in Bolivia

SummaryChusquea deficiens Parodi and C. floribunda Guerreiro & Rúgolo, described as endemic to Argentina, are cited for the first time in Bolivia. Morphological diagnostic characters as well as those related to the ecology of C. deficiens and C. floribunda are compared in a table with those of allied and sympatric species. Also, a map showing their updated distribution is included.

FLORACIÓN DE BAMBUSA TULDOIDES (POACEAE, BAMBUSOIDEAE, BAMBUSEAE) EN AMÉRICA AUSTRAL

La floracion de un bambu es un evento particular. El registro de la floracion de una mata o una poblacion aporta datos precisos sobre los ciclos biologicos. Bambusa tuldoides es una especie endemica de China y esta ampliamente cultivada en todo el mundo. En la Argentina, la primera referencia sobre su cultivo es de 1943. No se han registrado fructificaciones de esta especie en la Argentina. Registramos la floracion de un ejemplar de B. tuldoides en cultivo y recolectamos datos sobre otros eventos de floracion de esta especie en la Argentina y paises limitrofes. Con esta informacion, estimamos el ciclo de floracion de B. tuldoides en America austral en 23 anos aproximadamente. Registramos la produccion de frutos viables por primera vez en Argentina.