Comparison between Recent and Mesozoic Floras in Madagascar

1.1994年野外调查(1)。古生物学研究。从Menabe地区白垩纪的石化木中鉴定出两种双子叶植物和一种针叶树。这是马达加斯加中生代石化森林研究的开创性工作。植物学研究发现了两种未知植物，被认为是龙葵科的属间杂交植物和龙葵科的亚属间杂交植物。1995年野外调查。古生物学研究。在图尔尔东北140公里处的Manamana山，从侏罗纪收集的石化木材中发现了一种非木质木材。从Sakaraha地区的白垩纪和侏罗纪收集了石化木材。侏罗纪标本因保存不良而无法辨认，但白垩纪标本正在研究中。(2)对贝提奥基地区侏罗系的木屑化石进行了鉴定。植物的研究。在马纳马纳山脉发现了一个被认为是一个新分类单元的Pachypodium （Apocinaceae）的群落。研究了芦荟（Liliaceae）在图利尔和塔那那利佛之间的特殊分布。发现了2个种间自然杂交种和2个稀有种的新生境。

1.Field survey of 1994(1).Paleontological studies.Two species of dicotyledon and a species of conifer were recognized from petrified woods collected from the Cretaceous of Menabe region.This is a pioneering work on Mesozoic petrified woods in Madagascar.(2).Botanical studiesTwo kinds of unknown plant, which are thought to be intergeneric hybrid of Didiereaceae and intersubgeneric hybrid of Kalanchoe (Crassuraceae), were found.2.Field survey of 1995.(1).Paleontological studies.An araucariaceous wood has been identified from petrified woods collected from the Jurassic of Manamana mts., 140 km northeast of Tulear.Petrified woods were collected from the Cretaceous and the Jurassic of Sakaraha region.The Jurassic samples are not identifiable for its bad preservation, but the Cretaceous samples are under study.Fragmental fossil woods from the Jurassic of Betioky region are under identification.(2).Botanical studies.A colony of Pachypodium (Apocinaceae) which is thought to be of a new taxon was found in Manamana mts.Specific distribution of Aloe (Liliaceae) was investigated between Tulear and Antananarivo.Two interspecific natural hybrids and new localities of two rare species were found.