Astropanax and Neocussonia are two recently resurrected genera of Araliaceae that had long been considered as an Afro-Malagasy lineage of Schefflera. The wood structure of 11 Neocussonia spp. and eight Astropanax spp. has been studied. Neocussonia shows a higher average length of vessel elements (1319 µm) and number of bars on perforation plates (up to 66) than any other Araliaceae examined to date. Neocussonia is distinct from Astropanax by its smaller diameter and higher frequency of vessels, rare occurrence of simple perforation plates, more numerous bars on scalariform perforation plates and smaller intervessel pits. The interspecific variation in percentage of simple perforation plates, bar number on scalariform perforation plates, vessel frequency and uniseriate ray number is affected by seasonality in temperature and precipitation. The sharp distinction in wood structure between samples of A. abyssinicus from Cameroon and Burundi suggests that the populations from different parts of the disjunct range represent two different species. Our data also suggest that A. goetzenii is an artificial group. Astropanax myrianthus from Madagascar and A. polysciadus from continental Africa, two cryptic species that have long been included in Schefflera myriantha, show significant differences in vessel size and grouping, percentage of simple perforation plates and intervessel pit size.

中文翻译：

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Astropanax和Neocussonia的比较木材解剖学，Araliaceae的非洲-马尔加什族谱系

Astropanax和Neocussonia是Araliaceae的两个最近复活的属，长期以来一直被认为是Schefflera的Afro-Malagasy血统。11个新月见草属的木结构。和八个Astropanax spp。已经研究过了。与迄今检查过的任何其他金莲花科相比，新孢子虫显示出更高的平均血管长度（1319 µm）和穿孔板上的条数（最多66个）。新cuscusonia与Astropanax不同由于其较小的直径和较高的血管频率，很少出现简单的穿孔板，在scalariform穿孔板上有更多的钢筋，并且较小的脉管间孔。温度和降水的季节性会影响简单穿孔板的百分比，标孔穿孔板上的条数，容器频率和不适当的射线数之间的种间变化。喀麦隆和布隆迪的深渊农杆菌样品在木材结构上的明显区别表明，分离范围不同部分的种群代表两种不同的物种。我们的数据也表明A. goetzenii是一个人工群体。Astropanax myrianthus来自马达加斯加和A. polysciadus来自非洲大陆的两种隐性物种长期以来被包括在鹅掌柴中，它们在容器大小和分组，简单穿孔板的百分比和间孔的大小方面显示出显着差异。