ABSTRACT

In many cases over the years the diversity of Isoetes in India has been defined by inconsistent morphological analyses and questionable data. This has resulted in substantial confusion, dramatically different taxonomic interpretations and a low level of global acceptance. That in turn has prevented the reliable determination of conservation priorities. The present study reviews the most reliable morphological, distributional and cytological Indian data available with techniques and standards that have guided successful taxonomic investigations of Isoetes elsewhere in the world. This results in the enumeration of nine readily distinguishable species for India. One named hybrid is also discussed as is the probable occurrence of other unnamed hybrids. All Indian Isoetes species except I. coromandelina subsp. coromandelina are endemic. Two possible but unresolved taxa are also discussed. A clearer determination of the highest national priorities for Isoetes conservation has resulted. Most Indian taxa are rare, some qualifying as Endangered and others probably being extinct. Suggestions for conservation strategies and actions to protect and sustain vulnerable Isoetes species and their habitats are offered.

摘要

多年来，在许多情况下，形态学分析和可疑数据都不一致，从而定义了印度等位基因的多样性。这导致了极大的混乱，分类学解释上的显着不同以及全球接受度较低。这反过来又阻碍了对保护优先次序的可靠确定。本研究的审查的最可靠的形态，适用于所有具有引导成功的分类学研究技术和标准分布和细胞学印度数据韭在世界其他地方。这样就可以列举出印度的9种易于区分的物种。还讨论了一个命名的杂种，以及其他未命名的杂种可能出现的情况。所有印度等腰果种除了I. coromandelina亚种。coromandelina是地方性的。还讨论了两种可能但尚未解决的分类单元。从而更加清晰地确定了国家对等位藻类保护的最高优先事项。大多数印度分类单元都很稀有，有些分类为濒危物种，而另一些则可能已经灭绝。提供了关于保护和维持脆弱的等位线虫物种及其栖息地的保护策略和行动的建议。