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(American Journal of Botany. 2002;89:1725-1729.)
© 2002 Botanical Society of America, Inc.

Anatomy and Morphology

Occurrence and phylogenetic significance of latex in the Malpighiaceae1

Andrea S. Vega2,5, Maria A. Castro5 and William R. Anderson4,5

2Instituto de Botánica Darwinion, Labardén 200, C. C. 22, B1642HYD Buenos Aires, Argentina; 3Laboratorio de Anatomía Vegetal, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, C1428EHA Buenos Aires, Argentina;and 4University of Michigan Herbarium, Suite 112, 3600 Varsity Drive, Ann Arbor, Michigan 48108-2287 USA

Latex and laticifers are reported for the first time in the genera Galphimia and Verrucularia (Malpighiaceae), with description and illustration of the leaf and stem anatomy of both genera. Those genera and the other two in which latex is known (Lophanthera and Spachea) constitute a single tribe, Galphimieae, that is at or near the base of the family's phylogeny, which suggests that latex in the Malpighiaceae may indicate an ancestor shared with the Euphorbiaceae.

Key Words: Galphimia brasiliensis • Galphimieae • latex • laticifers • Malpighiaceae • Verrucularia glaucophylla




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