In this issue:

Am. J. Bot. 2003 90: 0. [Full Text]  

Brief Communication:

Juan P. Jaramillo-Correa and Jean Bousquet

New evidence from mitochondrial DNA of a progenitor-derivative species relationship between black spruce and red spruce (Pinaceae)
Am. J. Bot. 2003 90: 1801-1806. [Abstract] [Full Text]  

Development and Morphogenesis:

Chun-Neng Wang and Quentin C. B. Cronk

Meristem fate and bulbil formation in Titanotrichum (Gesneriaceae)
Am. J. Bot. 2003 90: 1696-1707. [Abstract] [Full Text]  

Ecology:

Megan E. Griffiths and Colin M. Orians

Responses of common and successional heathland species to manipulated salt spray and water availability
Am. J. Bot. 2003 90: 1720-1728. [Abstract] [Full Text]  

Genetics and Molecular Biology:

Briana L. Gross, Andrea E. Schwarzbach, and Loren H. Rieseberg

Origin(s) of the diploid hybrid species Helianthus deserticola (Asteraceae)
Am. J. Bot. 2003 90: 1708-1719. [Abstract] [Full Text]  

Physiology and Development:

Elena V. Voznesenskaya, Gerald E. Edwards, Olavi Kiirats, Elena G. Artyusheva, and Vincent R. Franceschi

Development of biochemical specialization and organelle partitioning in the single-cell C₄ system in leaves of Borszczowia aralocaspica (Chenopodiaceae)
Am. J. Bot. 2003 90: 1669-1680. [Abstract] [Full Text]  

Population Biology:

Salvatore Cozzolino, Maria E. Noce, Aldo Musacchio, and Alex Widmer

Variation at a chloroplast minisatellite locus reveals the signature of habitat fragmentation and genetic bottlenecks in the rare orchid Anacamptis palustris (Orchidaceae)
Am. J. Bot. 2003 90: 1681-1687. [Abstract] [Full Text]  

Elena Torres, José M. Iriondo, Adrián Escudero, and César Pérez

Analysis of within-population spatial genetic structure in Antirrhinum microphyllum (Scrophulariaceae)
Am. J. Bot. 2003 90: 1688-1695. [Abstract] [Full Text]  

Reproductive Biology:

Pati Vitt, Kent E. Holsinger, and Cynthia S. Jones

Local differentiation and plasticity in size and sex expression in jack-in-the-pulpit, Arisaema triphyllum (Araceae)
Am. J. Bot. 2003 90: 1729-1735. [Abstract] [Full Text]  

Sara V. Good-Avila, Thomas Nagel, Donna W. Vogler, and Andrew G. Stephenson

Effects of inbreeding on male function and self-fertility in the partially self-incompatible herb Campanula rapunculoides (Campanulaceae)
Am. J. Bot. 2003 90: 1736-1745. [Abstract] [Full Text]  

Matthew S. Finer and Martin T. Morgan

Effects of natural rates of geitonogamy on fruit set in Asclepias speciosa (Apocynaceae): evidence favoring the plant's dilemma
Am. J. Bot. 2003 90: 1746-1750. [Abstract] [Full Text]  

Takashi Y. Ida and Gaku Kudo

Floral color change in Weigela middendorffiana (Caprifoliaceae): reduction of geitonogamous pollination by bumble bees
Am. J. Bot. 2003 90: 1751-1757. [Abstract] [Full Text]  

Systematics:

Khidir W. Hilu, Thomas Borsch, Kai Müller, Douglas E. Soltis, Pamela S. Soltis, Vincent Savolainen, Mark W. Chase, Martyn P. Powell, Lawrence A. Alice, Rodger Evans, Hervé Sauquet, Christoph Neinhuis, Tracey A. B. Slotta, Jens G. Rohwer, Christopher S. Campbell, and Lars W. Chatrou

Angiosperm phylogeny based on <011>matK sequence information
Am. J. Bot. 2003 90: 1758-1776. [Abstract] [Full Text] [Data Supplement]  

A. Jonathan Shaw, Cymon J. Cox, and Sandra B. Boles

Polarity of peatmoss (Sphagnum) evolution: who says bryophytes have no roots?
Am. J. Bot. 2003 90: 1777-1787. [Abstract] [Full Text] [Data Supplement]  

Michael D. Windham and George Yatskievych

Chromosome studies of cheilanthoid ferns (Pteridaceae: Cheilanthoideae) from the western United States and Mexico
Am. J. Bot. 2003 90: 1788-1800. [Abstract] [Full Text]  

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