The Taxonomy and Geography of the Sino‐Himalayan Genus Cremanthodium Benth.
The Taxonomy and Geography of the Sino‐Himalayan Genus Cremanthodium Benth.
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DOI：
10.1111/j.1095-8339.1929.tb00589.x
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发表时间：
1929-06
影响因子：
2.4
通讯作者：
F. Good
中科院分区：
文献类型：
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作者：
F. Good
这一修订的属Cyemantlzodium进行了两个目标的看法-分类，如果必要的话，描述丰富的材料，特别是来自C！hina的分布，从而为方便地研究该亚洲山地特有属不同种的分布提供依据。本文分分类和地理两个部分，从种数和分布范围两个方面来看，有花植物中最大的属是异色花属。磅在世界各地，并包括一系列的增长形式和微小的差异趋势，这是不奇怪的，分类学家一直试图细分它的描述分离属。这些属的价值差异很大，纯粹是一个意见问题，但在实践中，eonie比其他人得到更多的认可。其中最著名的是Ligularia属。它通常由高大粗壮的草本植物组成，具有非常大的，通常肾形的叶和多头的长总状花序或由大而柔软的头状花序组成的蔓延的corylnbs。从其构成比例和其他细节上看，它们的特征十分明显，但很难在诊断学上加以充分描述。这类植物与千里光属的非正常概念不同，但还有其他种类不那么明显，它们往往不知不觉地逐渐变成典型的千里光属，这在伞房状的种类中特别明显，因此很难对橐吾属作出令人满意的属描述。然而，这些物种，在遗传学上，代表了Senccio的一种趋势，即增加一般大小，增加叶大小，以花椰菜叶，总状花序和头部本身的各种小特征为代价发展胚根。此外，它们在地理上是分离的，几乎完全局限于温暖的温带地区，
This revision of the genus Cyemantlzodium was undertaken with two objects in view-to classify and, if necessary, to describe the abundant material, especially that brought from C! hina in recent years, and, by so doing, to provide a basis from which the distribution of the different species of this montane Asiatic endemic genus might be conveniently studied. For these reasons the revision is divided into two parts-taxonomic and geographic.ConAidered in terms both of species-number and total range, the largest genus of the flowering plants is Xenecio. Pound in all parts of tho world, and including an array of growth-forms and minor differential trends, it is not surprising that taxonomists have constantly essayed to subdivide it by the description of segregate genera. The value of these genera varies considerably and is purely a matter of opinion, but in practice eonie have received more recognition than others. Among the better known is the genus Ligularia. It is composed in general of tall robust herbs with very large, often reniform, leaves and many-headed long racemes or spreadiiig corylnbs of large and liandsome capitula. The constituent proportions and other minutice of the capitnla give them a fncies which is quite distinct, but which it is difficult adequately to describe diagnasticnlly. Distinct as is this type of plant from the inorc nsual conception of Senecio, there are other species which are not so distinct, and which tend to grade imperceptibly into typical Sentcio, this being especially marked in the corymbose sp~ cies, and it is very difficult to make n satisfactory generic description for Ligularia. Nevertheless, these species, phylogenetically, represent, a trend from Senccio in the direction of increased general size, increase of leaf size, and development of radical at the expense of cauliiie leaves, racemose inflorescencPs, and various small features in the heads themselves. Moreover, they are geographically segregated, being almost entirely confined to warni temperate