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Annals of Botany 88: 1057-1069, 2001
© 2001 Annals of Botany Company

Generic Delimitation between Alstroemeria and Bomarea(Alstroemeriaceae)

A. M. Sanso and C. C. Xifreda+

Miembro de la Carrera Investigador Científico y Tecnológico CONICET, Instituto de Botánica Darwinion, C.C. 22, B1642HYD, San Isidro, Buenos Aires- Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina Investigador Principal CIC-PBA, Laboratorio de Etnobotánica y Botánica Aplicada, FCN y Museo, Universidad Nacional de La Plata, Paseo del Bosque s/n, 1900, La Plata, Argentina

Received: 21 September 2000 ; Returned for revision: 26 January 2001 . Accepted: 2 September 2001

The taxonomic relationships between Alstroemeria and Bomarea, two closely related genera in Alstroemeriaceae, are controversial. With the aim of clarifying their systematic position and generic circumscription, morphological and anatomical studies were carried out on 18 species of Alstroemeria and 11 species of Bomarea. Light microscopy (LM) and scanning (SEM) and transmission (TEM) electron microscopy were used to study the morphology of mature seeds and pollen. Observations on the most distinctive characters are discussed and compared with other data available for Alstroemeriaceae. Morphology of subterranean organs, pollen exine, adaptive dehiscence of capsules, seed dispersal, seed coat and karyotype characteristics (such as basic chromosome number and symmetry) support the view that these genera are related but should have independent generic status. Results indicate that Alstroemeriaceae comprises three genera:Alstroemeria (including Schickendantzia and Taltalia), Bomarea andLeontochir . Copyright 2001 Annals of Botany Company

Alstroemeria, Bomarea, Alstroemeriaceae, morphology, anatomy, subterranean organs, pollen, fruit, seed, chromosomes


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