油果樟属和近缘属的网脉结构式样

Venation Pattern of Syndiclis Hook. f. and Its Related Genera

摘要:

对油果樟属(Syndiclis Hook. f.)及其近缘属琼楠属(Beilschmiedia Nees)、孔药楠属(Sinopora J. Li et al.)、国产土楠属(Endiandra R. Br.)和Potameia的网脉结构进行了观察。结果表明，它们的网脉结构可分为3种类型：A型网格小且小脉无游离末端；B型网格小但有不分枝或简单分枝的游离末端；C型网格粗且网脉末端多分枝。琼楠属网脉结构多样，具有全部3种类型，其余4属均仅有1种类型，油果樟属、孔药楠属以及土楠属均为A型，明显不同于Potameia的C型网脉结构。

Abstract:

Minor venation patterns of Syndiclis, Beilschmiedia, Potameia, Sinopora, and Endiandra were observed. The results showed that their venation patterns could be grouped into three types, the Type A with fine leaf reticulations bearing no free ending of veinlets, the Type B with fine leaf reticulations having free and simple ending of veinlets, and the Type C with coarse leaf reticulations possessing profusely branched ending of veinlets. Beilschmiedia was provided with the most diversified venation including all 3 types while other genera had only one of the 3 types each. Syndiclis, Sinopora, and the Chinese Endiandra shared the Type A venation pattern which was different from Potameia with the Type C venation pattern.