Department of Botany, 2502 Plant Sciences, University of Georgia, Athens, Georgia 30602-7271 USA;
Am J Bot. 2001 Sep;88(9):1657-69.
The circumscription and relationships of genera within the tribe Melanthieae (29 representative taxa) were evaluated using parsimony analyses of ITS (nuclear ribosomal) and trnL-F (plastid) DNA sequence data, alone and in combination. Proposed new generic circumscriptions, strongly supported by the tree statistics and topologies in all analyses, are correlated with potential morphological synapomorphies at the proper level of universality. Based on the molecular cladograms, Stenanthium is biphyletic, and the traditional Zigadenus s.l. (sensu lato) is polyphyletic. Amianthium and Schoenocaulon are distinct entities; the Veratrum complex is conservatively treated as one large monophyletic genus (including Melanthium). Although some generic relationships are not highly resolved, the analyses provide strong support for Zigadenus glaberrimus as sister to the rest of the tribe, and Amianthium muscitoxicum as closely related to Veratrum s.l. As a result of these analyses, seven genera (some with novel circumscription) are recognized within the tribe Melanthieae: Amianthium, Anticlea, Schoenocaulon, Stenanthium, Toxicoscordion, Veratrum, and Zigadenus.
使用 ITS（核核糖体）和 trnL-F（质体）DNA 序列数据的简约分析，单独和组合评估了 Melanthieae 族内属的范围和关系（29 个代表分类群）。提出的新的通用范围，在所有分析中都得到了树统计和拓扑结构的强烈支持，与潜在的形态同源特征相关，具有适当的普遍性水平。基于分子系统发育树， Stenanthium 是二系的，传统的 Zigadenus s.l.（广义）是多系的。Amianthium 和 Schoenocaulon 是不同的实体；Veratrum 复合体被保守地视为一个大型单系属（包括 Melanthium）。尽管一些属的关系没有得到高度解决，但分析为 Zigadenus glaberrimus 作为该族其余部分的姐妹群以及 Amianthium muscitoxicum 与 Veratrum s.l. 的密切关系提供了强有力的支持。由于这些分析，在 Melanthieae 族内识别出七个属（其中一些具有新的范围）：Amianthium、Anticlea、Schoenocaulon、stenanthium、Toxicoscordion、Veratrum 和 Zigadenus。
