针刺类菝葜包括东亚分布的短梗菝葜(S.scobinicaulis)、华东菝葜(S.sieboldii),北美西部分布的加州菝葜(S.californica),北美东部分布的针刺菝葜(S.hispida),墨西哥及中美洲分布的S.moranensis、S.jalapenis,是一个形态显著、呈间断地理分布的单系类群.本文通过对该类群的大尺度亲缘地理学分析,旨在检验东亚植物类群具有更高的异域分化速率的
运用石蜡切片技术和扫描电镜方法,对一号冰川地区生长的4种灰藓科植物茎、叶的内部结构及叶表皮角质层褶皱、疣和中肋等进行观察,结果表明:4种灰藓科植物的茎表皮具粗疣,外皮部细胞小,3层,壁厚,排列紧密,细胞质浓厚;内皮部细胞大,壁薄,中轴分化不明显,中心有几个极小的细胞,说明它们是一类自然分类并具明显旱生特点的植物类群.
采用植物器官石蜡切片法,对永瓣藤属(Monimopetalum)及其近缘植物(卫矛科6属9种)的茎进行组织结构解剖研究,比较它们之间的异同.观察结果表明永瓣藤(Monimopetalum chinense)、南蛇藤(Celastrus orbiculatus)和雷公藤(Tripterygium wilfordii)木质部结构表现出较高的特化水平,而其他各属木质部结构特化水平较低;仅福建假卫矛(Mi
Pedicularis L.(Orobanchaceae) is a large lineage of root hemiparasitic plants, consisting of about 600 described species widely distributed in temperate zones of the northern hemisphere, and best repr
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