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Issue Table of ContentsAmerican Journal of Botany, Vol. 79, No. 11 (Nov., 1992), pp. 1209-1328Front MatterEcology and PhytogeographyContrasting Germination and Seedling Growth of Betula alleghaniensis and Rhus typhina Subjected to Various Amounts and Types of Plant Litter [pp.1209-1216]Partitioning Growth and Photosynthesis between Leaves and Stems During Nitrogen Limitation in Spartium junceum [pp.1217-1223]Seed Dispersal of Metrosideros polymorpha (Myrtaceae): A Pioneer Tree of Hawaiian Lava Flows [pp.1224-1228]Local Polyploid Variation in the Native Prairie Grass Andropogon gerardii [pp.1229-1232]

PaleobotanyFungi from the Lower Devonian Rhynie Chert: Chytridiomycetes [pp.1233-1241]Fossil Extrafloral Nectaries, Evidence for the Ant-Guard Antiherbivore Defense in an Oligocene Populus [pp.1242-1246]

Physiology, Biochemistry, and Cell BiologyGravity Effects on Cellulose Assembly [pp.1247-1258]Effect of Silicon Supply on Growth, Fertility, and Mineral Composition of an Annual Brome, Bromus secalinus L. (Gramineae) [pp.1259-1263]Reproductive Attrition in the Rare Chaparral Shrub Fremontodendron decumbens Lloyd (Sterculiaceae) [pp.1264-1272]Potential for the Loss of Self-Incompatibility in Pollen-Limited Populations of Mayapple (Podophyllum peltatum) [pp.1273-1278]

Systematics and EvolutionTracing Species Invasion in Codium, a Siphonous Green Alga, Using Molecular Tools [pp.1279-1285]

Physiology, Biochemistry, and Cell BiologyWhy Does the Size of Reproductive Structures Decline Through Time in Hydrophyllum appendiculatum (Hydrophyllaceae)?: Developmental Constraints vs. Resource Limitation [pp.1286-1290]

Systematics and EvolutionGenetic Diversity in Gossypium hirsutum and the Origin of Upland Cotton [pp.1291-1310]Genetic Diversity and Origin of the Hawaiian Islands Cotton, Gossypium tomentosum [pp.1311-1319]High-Resolution Leaf X-Radiography in Systematics and Paleobotany [pp.1320-1324]Is Organelle DNA Strictly Maternally Inherited? Power Analysis of a Binomial Distribution [pp.1325-1328]

Back Matter