Demography and matrix analysis on a natural Pterocarya rhoifolia population developed along a mountain stream.

The population structures and dynamics of a dominant riparian canopy species, Pterocarya rhoifolia (Juglandaceae), were analyzed based on the census data collected for the 7 years from 1989 through 1996. A study plot was established over an environmental gradient that included the lower hill-slope, river terrace, and low-level floodplain of a riparian area within a 2.8-ha cool-temperate forest stand.

Lignans and sesquiterpenes from Magnolia praecocissima.

A new lignan 1 was isolated together with the five known lignans 2-6 and four sesquiterpenes 7-10 from the seeds of Magnolia praecocissima. The structure of 1 was elucidated by analysis of spectroscopic data and chemical reaction. Furthermore, the absolute configurations of 1, 2, and 3 were determined by the modified Mosher's method.

Phenotypic plasticity in Cardamine flexuosa: variation among populations in plastic response to chilling treatments and photoperiods.

Variability in the plastic responses of seven life history traits to different chilling and photoperiod regimes was studied in four wild populations of Cardamine flexuosa. This species, a winter-green or year-long annual, showed a facultative long-day and chilling requirement for flowering. Considerable variation among populations was noted in plasticity of all traits.

The productive and reproductive biology of flowering plants X. Reproductive energy allocation and propagule output of five congeners of the genus Setaria (Gramineae).

The energy allocation patterns to reproductive structures (RA) and the propagule output (P) of five annual weedy or ruderal fox-tail species (Gramineae)-Setaria viridis (2x) (including var. pachystachys (2x)), S. X pycnocoma (2x), S.

The productive and reproductive biology of flowering plants : VII. resource allocation and reproductive capacity in wild populations of Heloniopsis orientalis (Thunb.) C. Tanaka (Liliaceae).

The seasonal growth cycles and dry matter partitioning of Heloniopsis orientalis (Thunb.) C. Tanaka (Liliaceae) into its component organs throughout the year were studied and compared with one another in five selected populations at different altitudes in Toyama Prefecture, Japan (i.