Invited Special Paper:

Jeremy D. Pickett-Heaps, Brian E. S. Gunning, Roy C. Brown, Betty E. Lemmon, and Ann L. Cleary

The cytoplast concept in dividing plant cells: cytoplasmic domains and the evolution of spatially organized cell division
Am. J. Bot. 1999 86: 153-172. [Abstract] [Full Text]  

Anatomy and Morphology:

C. John Runions, Kim H. Rensing, Tokushiro Takaso, and John N. Owens

Pollination of Picea orientalis (Pinaceae): saccus morphology governs pollen buoyancy
Am. J. Bot. 1999 86: 190-197. [Abstract] [Full Text]  

Brief Communication:

Hitoshi Watanabe, Toshio Ando, Eisho Nishino, Hisashi Kokubun, Tatsuya Tsukamoto, Goro Hashimoto, and Eduardo Marchesi

Three groups of species in Petunia sensu Jussieu (Solanaceae) inferred from the intact seed morphology
Am. J. Bot. 1999 86: 302-305. [Abstract] [Full Text]  

Bryology and Lichenology:

Andreas J. Prinzing

Wind-acclimated thallus morphogenesis in a lichen (Evernia prunastri, Parmeliaceae) probably favored by grazing disturbances
Am. J. Bot. 1999 86: 173-183. [Abstract] [Full Text]  

Mycology and Plant Pathology:

James D. Lawrey, Albert P. Torzilli, and Vikas Chandhoke

Destruction of lichen chemical defenses by a fungal pathogen
Am. J. Bot. 1999 86: 184-189. [Abstract] [Full Text]  

Population Biology:

Masayuki Maki, Hiroko Morita, Syuji Oiki, and Hiroshi Takahashi

The effect of geographic range and dichogamy on genetic variability and population genetic structure in Tricyrtis section Flavae (Liliaceae)
Am. J. Bot. 1999 86: 287-292. [Abstract] [Full Text]  

Paula S. Williamson and Charles R. Werth

Levels and patterns of genetic variation in the endangered species Abronia macrocarpa (Nyctaginaceae)
Am. J. Bot. 1999 86: 293-301. [Abstract] [Full Text]  

Reproductive Biology:

Richard A. Niesenbaum

The effects of pollen load size and donor diversity on pollen performance, selective abortion, and progeny vigor in Mirabilis jalapa (Nyctaginaceae)
Am. J. Bot. 1999 86: 261-268. [Abstract] [Full Text]  

Robert A. Klips

Pollen competition as a reproductive isolating mechanism between two sympatric Hibiscus species (Malvaceae)
Am. J. Bot. 1999 86: 269-272. [Abstract] [Full Text]  

C. Eugene Jones and Mitchell B. Cruzan

Floral morphological changes and reproductive success in deer weed (Lotus scoparius, Fabaceae)
Am. J. Bot. 1999 86: 273-277. [Abstract] [Full Text]  

Elizabeth Elle

Sex allocation and reproductive success in the andromonoecious perennial Solanum carolinense (Solanaceae). I. Female success
Am. J. Bot. 1999 86: 278-286. [Abstract] [Full Text]  

Structure and Development:

Shelley A. James, William K. Smith, and Thomas C. Vogelmann

Ontogenetic differences in mesophyll structure and chlorophyll distribution in Eucalyptus globulus ssp. globulus (Myrtaceae)
Am. J. Bot. 1999 86: 198-207. [Abstract] [Full Text]  

Systematics:

Kenneth M. Cameron, Mark W. Chase, W. Mark Whitten, Paul J. Kores, David C. Jarrell, Victor A. Albert, Tomohisa Yukawa, Harold G. Hills, and Douglas H. Goldman

A phylogenetic analysis of the Orchidaceae: evidence from rbcL nucleotide sequences
Am. J. Bot. 1999 86: 208-224. [Abstract] [Full Text]  

John V. Freudenstein and Finn N. Rasmussen

What does morphology tell us about orchid relationships?—a cladistic analysis
Am. J. Bot. 1999 86: 225-248. [Abstract] [Full Text]  

Mia Molvray, Paul J. Kores, and Mark W. Chase

Phylogenetic relationships within Korthalsella (Viscaceae) based on nuclear ITS and plastid trnL-F sequence data
Am. J. Bot. 1999 86: 249-260. [Abstract] [Full Text]  

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