Abstract Detail

Systematics Section / ASPT

Brown, Gregory K. [1], Leme, Elton [2].

Phylogenetic analysis of the genus Canistropsis Bromeliaceae.

Canistropsis Leme (12 spp.) is one of several genera in the subfamily Bromelioideae endemic to the Atlantic Forest of Brazil. The genus unites 12 species with nidular bi- to tripinnately branched inflorescences, long, slender stolons, and suberect to spreading petals with acuminate, acute, or apiculate apices that become flaccidescent in post-anthesis. A parsimony analysis incorporating 77 morphological characters and all known species of Canistropsis was conducted. Because sister-taxon relationships for Canistropis are equivocal, the ingroup also included Aechmea (6 spp.), Greigia (3 spp.) Neoregelia (6 spp.) and Nidularium (6 spp.). The analysis was rooted with Cryptanthus (6 spp.) and Orthophytum (6 spp.) as the outgroup, in agreement by molecular data. With the exception of two species, C. selloana (Baker) Leme, and C. correia-araujoi (E.Pereira & Leme) Leme, results support Canistropsis as monophyletic. Canistropsis correia-araujoi is a suspected natural intergeneric hybrid, and we propose the transfer of C. selloana back into the monotypic genus Andrea Baker (A. selloana). The results of this study are supported by preliminary DNA sequence data.

1 - University of Wyoming, Department of Botany, 1000 E. University Ave., Laramie, Wyoming, 82071, USA
2 - Herbarium Bradeanum, Caxia Postal 15005, Rio de Janeiro, RJ, 20031, Brazil

Keywords:
Bromeliaceae
Bromelioideae
Canistropsis
phylogenetics.

Presentation Type: Paper
Session: 2-14
Location: Cottonwood A (Snowbird Center)
Date: Monday, August 2nd, 2004
Time: 11:30 AM
Abstract ID:290