A monograph of the 425 New World species of Ipomoea is presented. All 425 species are described and information is provided on their ecology and distribution, with citations from all countries from which they are reported. Notes are provided on salient characteristics and taxonomic issues related to individual species. A full synonymy is provided and 272 names are lectotypified. An extensive introduction discusses the delimitation and history of Ipomoea arguing that a broad generic concept is the only rational solution in the light of recent phylogenetic advances. Although no formal infrageneric classification is proposed, attention is drawn to the major clades of the genus and several morphologically well-defined clades are discussed including those traditionally treated under the names Arborescens, Batatas, Pharbitis, Calonyction and Quamoclit, sometimes as distinct genera, subgenera, sections or series. Identification keys are provided on a regional basis including multi-entry keys for the main continental blocks. Six species are described as new, Ipomoea nivea J.R.I. Wood & Scotland from Peru, I. apodiensis J.R.I. Wood & Scotland from Brazil, I. calcicola J.R.I. Wood & Scotland, I. pochutlensis J.R.I. Wood & Scotland, I. zacatecana J.R.I. Wood & Scotland and I. ramulosa J.R.I. Wood & Scotland from Mexico, while var. australis of I. cordatotriloba is raised to specific status as I. australis (O'Donell) J.R.I. Wood & P. Muñoz. New subspecies for I. nitida (subsp. krapovickasii J.R.I. Wood & Scotland) and for I. chenopodiifolia (subsp. bellator J.R.I. Wood & Scotland) are described. The status of previously recognized species and varieties is changed so the following new subspecies are recognized: I. amnicola subsp. chiliantha (Hallier f.) J.R.I. Wood & Scotland, I. chenopodiifolia subsp. signata (House) J.R.I. Wood & Scotland, I. orizabensis subsp. collina (House) J.R.I. Wood & Scotland, I. orizabensis subsp. austromexicana (J.A. McDonald) J.R.I. Wood & Scotland, I. orizabensis subsp. novogaliciana (J.A. McDonald) J.R.I. Wood & Scotland, I. setosa subsp. pavonii (Hallier f.) J.R.I. Wood & Scotland, I. setosa subsp. melanotricha (Brandegee) J.R.I. Wood & Scotland, I. setosa subsp. sepacuitensis (Donn. Sm.) J.R.I. Wood & Scotland, I. ternifolia subsp. leptotoma (Torr.) J.R.I. Wood & Scotland. Ipomoea angustata and I. subincana are treated as var. angustata (Brandegee) J.R.I. Wood & Scotland and var. subincana (Choisy) J.R.I. Wood & Scotland of I. barbatisepala and I. brasiliana respectively. Attention is drawn to a number of hitherto poorly recognized phenomena in the genus including a very large radiation centred on the Parana region of South America and another on the Caribbean Islands, a strong trend towards an amphitropical distribution in the New World, the existence of a relatively large number of species with a pantropical distribution and of many species in different clades with storage roots, most of which have never been evaluated for economic purposes. The treatment is illustrated with over 200 figures composed of line drawings and photographs.

中文翻译：

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新世界番薯科的基础专着。

介绍了425种新世界的Ipomoea物种的专题论文。描述了所有425种物种，并提供了有关其生态和分布的信息，并提供了来自所有国家的引文。提供了有关个别物种的显着特征和分类问题的注释。提供了完整的同义词，并选择了272个名称。广泛的介绍讨论了番薯的划界和历史，并指出，鉴于最近的系统进化，广义的泛型概念是唯一合理的解决方案。尽管未提出正式的属下分类方法，但仍要注意该属的主要进化枝，并讨论了几种形态学明确的进化枝，包括传统上以Arborescens，Batatas，Pharbitis，Calonyction和Quamoclit等名称处理的进化枝，有时是不同的属，子属，科或系列。识别码是按地区提供的，其中包括主要大陆块的多次输入键。六个物种被描述为新种，来自秘鲁的Ipomoea nivea JRI木和苏格兰，来自巴西的I. apodiensis JRI木和苏格兰，I。calcicola JRI木和苏格兰，I。pochutlensis JRI木和苏格兰，I。zacatecana JRI木和苏格兰和I. ramulosa来自墨西哥的JRI Wood和苏格兰，而var。三角果I. australis被提升为特定状态，即南方I. australis（O'Donell）JRI Wood＆P.Muñoz。描述了新的亚种：I。nitida（亚种krapovickasii JRI Wood和苏格兰）和I. chenopodiifolia（亚种bellator JRI Wood＆Scotland）。先前公认的物种和品种的状态已更改，因此可以识别以下新的亚种：I. amnicola亚种。chiliantha（Hallier f。）JRI Wood和苏格兰，chenopodiifolia亚种。signata（House）JRI Wood＆Scotland，I. orizabensis subsp。Collina（House）JRI Wood＆Scotland，I. orizabensis subsp。austromexicana（JA McDonald），JRI Wood和苏格兰，I。orizabensis亚种。Novogaliciana（JA麦当劳）JRI Wood和苏格兰，setosa亚种。pavonii（Hallier f。）JRI Wood和苏格兰，setosa亚种。melanotricha（Brandegee）JRI Wood＆Scotland，I。setosa subsp。sepacuitensis（Donn。Sm。）JRI Wood和苏格兰，terifolia亚种。瘦肉瘤（Torr。）JRI Wood和苏格兰。Ipomoea angustata和I. subincana被视为var。阿古斯塔塔（布兰德吉）JRI Wood＆苏格兰和瓦尔 subincana（Choisy）JRI Wood和I. barbatisepala和I. brasiliana的苏格兰。引起人们注意的是迄今为止该属中许多尚未得到公认的现象，包括以南美洲的帕拉纳地区为中心的大辐射，以及以加勒比群岛为中心的大辐射，在新世界中存在两性分布的强烈趋势，相对而言，具有泛热带分布的物种相对较多，并且许多物种都位于具有储藏根的不同进化枝中，其中大多数从未出于经济目的进行过评估。用线描图和照片组成的200多个图形说明了这种处理方法。引起人们注意的是迄今为止该属中许多尚未得到公认的现象，包括以南美洲的帕拉纳地区为中心的大辐射，以及以加勒比群岛为中心的大辐射，在新世界中存在两性分布的强烈趋势，相对而言，具有泛热带分布的物种相对较多，并且许多物种都位于具有储藏根的不同进化枝中，其中大多数从未出于经济目的进行过评估。用线描图和照片组成的200多个图形说明了这种处理方法。引起人们注意的是迄今为止该属中许多尚未得到公认的现象，包括以南美洲的帕拉纳地区为中心的大辐射，以及以加勒比群岛为中心的大辐射，在新世界中存在两性分布的强烈趋势，相对而言，具有泛热带分布的物种相对较多，并且许多物种位于具有储藏根的不同进化枝中，其中大多数从未出于经济目的进行过评估。用线描图和照片组成的200多个图形说明了这种处理方法。存在着具有泛热带分布的相对大量的物种，并且在不同的进化枝中有许多具有贮藏根的物种，大多数物种从未出于经济目的进行评估。用线描图和照片组成的200多个图形说明了这种处理方法。存在着具有泛热带分布的相对大量的物种，并且在不同的进化枝中有许多具有贮藏根的物种，大多数物种从未出于经济目的进行评估。用线描图和照片组成的200多个图形说明了这种处理方法。