In this issue:

Am. J. Bot. 2002 89: 0. [Full Text]  

Biomechanics:

Hanns-Christof Spatz and Olga Speck

Oscillation frequencies of tapered plant stems
Am. J. Bot. 2002 89: 1-11. [Abstract] [Full Text]  

Karl J. Niklas, Francisco Molina-Freaner, Clara Tinoco-Ojanguren, and Dominick J. Paolillo, Jr

The biomechanics of Pachycereus pringlei root systems
Am. J. Bot. 2002 89: 12-21. [Abstract] [Full Text]  

Book Review:

Jennifer H. Richards and David W. Lee

"To see ... Heaven in a Wild Flower....": Teaching botany in the 21st century
Am. J. Bot. 2002 89: 172-176. [Abstract] [Full Text]  

Ecology:

Christina E. Wells, D. Michael Glenn, and David M. Eissenstat

Changes in the risk of fine-root mortality with age: a case study in peach, Prunus persica (Rosaceae)
Am. J. Bot. 2002 89: 79-87. [Abstract] [Full Text]  

Andrew D. Richardson and Graeme P. Berlyn

Spectral reflectance and photosynthetic properties of Betula papyrifera (Betulaceae) leaves along an elevational gradient on Mt. Mansfield, Vermont, USA
Am. J. Bot. 2002 89: 88-94. [Abstract] [Full Text]  

Lorena López de Buen and Juan Francisco Ornelas

Host compatibility of the cloud forest mistletoe Psittacanthus schiedeanus (Loranthaceae) in Central Veracruz, Mexico
Am. J. Bot. 2002 89: 95-102. [Abstract] [Full Text]  

Jeffrey K. Conner and Rachel Neumeier

The effects of ultraviolet-B radiation and intraspecific competition on growth, pollination success, and lifetime female fitness in Phacelia campanularia and P. purshii (Hydrophyllaceae)
Am. J. Bot. 2002 89: 103-110. [Abstract] [Full Text]  

Maria Clara Castellanos, Paul Wilson, and James D. Thomson

Dynamic nectar replenishment in flowers of Penstemon (Scrophulariaceae)
Am. J. Bot. 2002 89: 111-118. [Abstract] [Full Text]  

Warren G. Abrahamson and James N. Layne

Post-fire recovery of acorn production by four oak species in southern ridge sandhill association in south-central Florida
Am. J. Bot. 2002 89: 119-123. [Abstract] [Full Text]  

Warren G. Abrahamson and James N. Layne

Relation of ramet size to acorn production in five oak species of xeric upland habitats in south-central Florida
Am. J. Bot. 2002 89: 124-131. [Abstract] [Full Text]  

Genetics and Molecular Biology:

Claire Arnold, Maurizio Rossetto, Jody McNally, and Robert J. Henry

The application of SSRs characterized for grape (Vitis vinifera) to conservation studies in Vitaceae
Am. J. Bot. 2002 89: 22-28. [Abstract] [Full Text]  

Population Biology:

Ashley B. Morris, Regina S. Baucom, and Mitchell B. Cruzan

Stratified analysis of the soil seed bank in the cedar glade endemic Astragalus bibullatus: evidence for historical changes in genetic structure
Am. J. Bot. 2002 89: 29-36. [Abstract] [Full Text]  

Reproductive Biology:

W. Scott Armbruster, Christa P. H. Mulder, Bruce G. Baldwin, Susan Kalisz, Bridget Wessa, and Helen Nute

Comparative analysis of late floral development and mating-system evolution in tribe Collinsieae (Scrophulariaceae s.l.)
Am. J. Bot. 2002 89: 37-49. [Abstract] [Full Text] [Supplemental Data]  

Ute Moog, Brigitte Fiala, Walter Federle, and Ulrich Maschwitz

Thrips pollination of the dioecious ant plant Macaranga hullettii (Euphorbiaceae) in Southeast Asia
Am. J. Bot. 2002 89: 50-59. [Abstract] [Full Text]  

Tanaka Kenta, Kentaro K. Shimizu, Michiko Nakagawa, Kiyotaka Okada, Abang A. Hamid, and Tohru Nakashizuka

Multiple factors contribute to outcrossing in a tropical emergent Dipterocarpus tempehes, including a new pollen-tube guidance mechanism for self-incompatibility
Am. J. Bot. 2002 89: 60-66. [Abstract] [Full Text]  

Gregory J. Anderson and James D. Hill

Many to flower, few to fruit: the reproductive biology of Hamamelis virginiana (Hamamelidaceae)
Am. J. Bot. 2002 89: 67-78. [Abstract] [Full Text]  

Systematics:

Philippe Cuénoud, Vincent Savolainen, Lars W. Chatrou, Martyn Powell, Renée J. Grayer, and Mark W. Chase

Molecular phylogenetics of Caryophyllales based on nuclear 18S rDNA and plastid rbcL, atpB, and matK DNA sequences
Am. J. Bot. 2002 89: 132-144. [Abstract] [Full Text] [Supplemental Data]  

Johan H. E. Rova, Piero G. Delprete, Lennart Andersson, and Victor A. Albert

A trnL-F cpDNA sequence study of the Condamineeae-Rondeletieae-Sipaneeae complex with implications on the phylogeny of the Rubiaceae
Am. J. Bot. 2002 89: 145-159. [Abstract] [Full Text]  

Joongku Lee, Bruce G. Baldwin, and L. D. Gottlieb

Phylogeny of Stephanomeria and related genera (compositae–lactuceae) based on analysis of 18S–26S nuclear rDNA ITS and ETS sequences
Am. J. Bot. 2002 89: 160-168. [Abstract] [Full Text]  

Brief Communications:

Marco A. Pizo and L. Patrícia C. Morellato

A new rain-operated seed dispersal mechanism in Bertolonia mosenii (Melastomataceae), a Neotropical rainforest herb
Am. J. Bot. 2002 89: 169-171. [Abstract] [Full Text]  

Errata:

Erratum
Am. J. Bot. 2002 89: 176. [Full Text]  

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