A cursorial description is given of the cranial morphology of Stegodon orientalis Owen, 1870, based on
materials collected by W. Granger during 1920-1921 from Yanjingou, Sichuan, China. The cranial vault
of S. orientalis shows enigmatic autapomorphies such as loss of the crista nuchae, a pair of prominent
domes on the vertex and a shallow groove on the forehead. Beside these enigmatic characteristics, the
cranial morphology, the forehead in particular, closely resembles that of S. trigonocephalus and S.
ganesa, suggesting a sister-group relationship for S. orientalis and the S. trigonocephalus group
(sensu Saegusa, in print)
Field experiments were conducted at the Yodogawa river in Osaka Pref. in 1988 and 1989 to clarify
the effects of different frequency cutting on growth and species composition of the Solidago altissima
community. Six plots differing in cutting frequency were examined. This community was retrogressive
at three or more cuttings per year. As cutting frequency increased, not only did the number of component
species increase, the number and percentage of annual plants per plot increased also. The percentage of
annual plants attained 50 percent or more in plots cut three times or more. Seasonal succession was
recognized in the floristic composition of this community, whose spring aspect was characterized by
winter annual plants, the autumn aspect being characterized by summer annual plants. Though winter
annual plants grew in the non-cut plot, summer annual plants did not.
Corm meristematic tissue of Arisaema yamatense Nakai was cultured on Murashige & Skoog media
(Murashige and Skoog, 1962) supplemented with 3% sucrose and growth regulators (NAA, Kinetin,
2,4-D, and BA) in several combinations. Developed corm-like tissues were subcultured. These
corm-like tissues differentiated to primordial stems and roots and they grew to stems and roots. This
redifferentiation ability has been maintained for two years.