In this issue:

Am. J. Bot. 2004 91: 0. [Full Text]  

Brief Communication:

H.-Ch. Spatz and A. Emanns

The mechanical role of the endodermis in Equisetum plant stems
Am. J. Bot. 2004 91: 1936-1938. [Abstract] [Full Text] [PDF]  

W. Scott Armbruster and Denise Gobeille Rogers

Does pollen competition reduce the cost of inbreeding?
Am. J. Bot. 2004 91: 1939-1943. [Abstract] [Full Text] [PDF] [HTML Page - index.htslp]  

Development and Morphogenesis:

Val Raghavan

Role of 2,4-dichlorophenoxyacetic acid (2,4-D) in somatic embryogenesis on cultured zygotic embryos of Arabidopsis: cell expansion, cell cycling, and morphogenesis during continuous exposure of embryos to 2,4-D
Am. J. Bot. 2004 91: 1743-1756. [Abstract] [Full Text] [PDF]  

Genetics and Molecular Biology:

Maria V. Cattell and Stephen A. Karl

Genetics and morphology in a Borrichia frutescens and B. arborescens (Asteraceae) hybrid zone
Am. J. Bot. 2004 91: 1757-1766. [Abstract] [Full Text] [PDF]  

Paleobotany:

Robyn J. Burnham and Nina L. Carranco

Miocene winged fruits of Loxopterygium (Anacardiaceae) from the Ecuadorian Andes
Am. J. Bot. 2004 91: 1767-1773. [Abstract] [Full Text] [PDF]  

Population Biology:

Guy Colling, Claude Reckinger, and Diethart Matthies

Effects of pollen quantity and quality on reproduction and offspring vigor in the rare plant Scorzonera humilis (Asteraceae)
Am. J. Bot. 2004 91: 1774-1782. [Abstract] [Full Text] [PDF]  

Eric J. Baack

Cytotype segregation on regional and microgeographic scales in snow buttercups (Ranunculus adoneus: Ranunculaceae)
Am. J. Bot. 2004 91: 1783-1788. [Abstract] [Full Text] [PDF] [Supplementary Data]  

Steven R. Larson, Thomas A. Jones, and Kevin B. Jensen

Population structure in Pseudoroegneria spicata (Poaceae: Triticeae) modeled by Bayesian clustering of AFLP genotypes
Am. J. Bot. 2004 91: 1789-1801. [Abstract] [Full Text] [PDF] [Supplementary Data]  

Kevin S. Burgess and Brian C. Husband

Maternal and paternal contributions to the fitness of hybrids between red and white mulberry (Morus, Moraceae)
Am. J. Bot. 2004 91: 1802-1808. [Abstract] [Full Text] [PDF]  

Reproductive Biology:

Amy E. Boyd

Breeding system of Macromeria viridiflora (Boraginaceae) and geographic variation in pollinator assemblages
Am. J. Bot. 2004 91: 1809-1813. [Abstract] [Full Text] [PDF]  

Makoto Kato and Atsushi Kawakita

Plant-pollinator interactions in New Caledonia influenced by introduced honey bees
Am. J. Bot. 2004 91: 1814-1827. [Abstract] [Full Text] [PDF]  

Matthew H. Collier and Steven H. Rogstad

Clonal variation in floral stage timing in the common dandelion Taraxacum officinale (Asteraceae)
Am. J. Bot. 2004 91: 1828-1833. [Abstract] [Full Text] [PDF]  

Systematics:

Pia Järvinen, Anna Palmé, Luis Orlando Morales, Mika Lännenpää, Markku Keinänen, Tuomas Sopanen, and Martin Lascoux

Phylogenetic relationships of Betula species (Betulaceae) based on nuclear ADH and chloroplast matK sequences
Am. J. Bot. 2004 91: 1834-1845. [Abstract] [Full Text] [PDF] [Supplementary Data]  

Martin F. Wojciechowski, Matt Lavin, and Michael J. Sanderson

A phylogeny of legumes (Leguminosae) based on analysis of the plastid matK gene resolves many well-supported subclades within the family
Am. J. Bot. 2004 91: 1846-1862. [Abstract] [Full Text] [PDF] [Supplementary Data]  

David A. Baum, Stacey DeWitt Smith, Alan Yen, William S. Alverson, Reto Nyffeler, Barbara A. Whitlock, and Rebecca L. Oldham

Phylogenetic relationships of Malvatheca (Bombacoideae and Malvoideae; Malvaceae sensu lato) as inferred from plastid DNA sequences
Am. J. Bot. 2004 91: 1863-1871. [Abstract] [Full Text] [PDF] [Supplementary Data]  

Damon P. Little, Andrea E. Schwarzbach, Robert P. Adams, and Chang-Fu Hsieh

The circumscription and phylogenetic relationships of Callitropsis and the newly described genus Xanthocyparis (Cupressaceae)
Am. J. Bot. 2004 91: 1872-1881. [Abstract] [Full Text] [PDF] [Supplementary Data]  

Kenneth J. Wurdack, Petra Hoffmann, Rosabelle Samuel, Anette de Bruijn, Michelle van der Bank, and Mark W. Chase

Molecular phylogenetic analysis of Phyllanthaceae (Phyllanthoideae pro parte, Euphorbiaceae sensu lato) using plastid RBCL DNA sequences
Am. J. Bot. 2004 91: 1882-1900. [Abstract] [Full Text] [PDF]  

Yuguo Wang, Peter W. Fritsch, Suhua Shi, Frank Almeda, Boni C. Cruz, and Lawrence M. Kelly

Phylogeny and infrageneric classification of Symplocos (Symplocaceae) inferred from DNA sequence data
Am. J. Bot. 2004 91: 1901-1914. [Abstract] [Full Text] [PDF] [Supplementary Data]  

Systematics and Phytogeography:

M. Patrick Griffith

The origins of an important cactus crop, Opuntia ficus-indica (Cactaceae): new molecular evidence
Am. J. Bot. 2004 91: 1915-1921. [Abstract] [Full Text] [PDF] [Supplementary Data]  

Fenny Dane and Ping Lang

Sequence variation at cpDNA regions of watermelon and related wild species: implications for the evolution of Citrullus haplotypes
Am. J. Bot. 2004 91: 1922-1929. [Abstract] [Full Text] [PDF]  

Aaron M. Ellison, Hannah L. Buckley, Thomas E. Miller, and Nicholas J. Gotelli

Morphological variation in Sarracenia purpurea (Sarraceniaceae): geographic, environmental, and taxonomic correlates
Am. J. Bot. 2004 91: 1930-1935. [Abstract] [Full Text] [PDF]  

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