A Synopsis of <em>Croton</em> (Euphorbiaceae) in Michoacán, Mexico

A taxonomic and nomenclatural review of the genus <i>Croton</i> (Euphorbiaceae) in the Mexican state of Michoacán is presented. Six sections and 20 species are here reported. The greatest diversity is in the Balsas Depression province, where at least 12 species occur. There is a strong t...

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Main Author: Victor W. Steinmann
Format: Article
Language:English
Published: MDPI AG 2021-11-01
Series:Taxonomy
Subjects:
Online Access:https://www.mdpi.com/2673-6500/1/4/29
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author Victor W. Steinmann
author_facet Victor W. Steinmann
author_sort Victor W. Steinmann
collection DOAJ
description A taxonomic and nomenclatural review of the genus <i>Croton</i> (Euphorbiaceae) in the Mexican state of Michoacán is presented. Six sections and 20 species are here reported. The greatest diversity is in the Balsas Depression province, where at least 12 species occur. There is a strong tendency to thrive in tropical deciduous forest. An identification key is provided, and for each species, the following information is included: protologue citation, type information, habit, habitat, and elevation within the state, regional and global distribution, and phenology. Relevant synonyms are listed, as too are herbarium specimens. Lectotypes are designated for <i>Croton draco</i>, <i>C. niveus</i>, and <i>C. calvescens</i>. One species, <i>Croton rojasii</i>, is described as new and illustrated with photos. It is known only from tropical deciduous forest in the Zicuirán-Infiernillo Biosphere Reserve, at elevations from 400 to 700 m. It belongs to sect. <i>Geiseleria</i> and is remarkable because of the strongly unequal pistillate sepals, the larger of which becoming accrescent and exceeding the fruit.
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spelling doaj.art-94cc771caf54484cba5bf4b65912bbf12023-11-23T10:47:53ZengMDPI AGTaxonomy2673-65002021-11-011439542410.3390/taxonomy1040029A Synopsis of <em>Croton</em> (Euphorbiaceae) in Michoacán, MexicoVictor W. Steinmann0Facultad de Ciencias Naturales, Universidad Autónoma de Querétaro, Av. de las Ciencias s/n, Del. Sta. Rosa Jáuregui, Querétaro 76230, MexicoA taxonomic and nomenclatural review of the genus <i>Croton</i> (Euphorbiaceae) in the Mexican state of Michoacán is presented. Six sections and 20 species are here reported. The greatest diversity is in the Balsas Depression province, where at least 12 species occur. There is a strong tendency to thrive in tropical deciduous forest. An identification key is provided, and for each species, the following information is included: protologue citation, type information, habit, habitat, and elevation within the state, regional and global distribution, and phenology. Relevant synonyms are listed, as too are herbarium specimens. Lectotypes are designated for <i>Croton draco</i>, <i>C. niveus</i>, and <i>C. calvescens</i>. One species, <i>Croton rojasii</i>, is described as new and illustrated with photos. It is known only from tropical deciduous forest in the Zicuirán-Infiernillo Biosphere Reserve, at elevations from 400 to 700 m. It belongs to sect. <i>Geiseleria</i> and is remarkable because of the strongly unequal pistillate sepals, the larger of which becoming accrescent and exceeding the fruit.https://www.mdpi.com/2673-6500/1/4/29Balsas Depressionnew speciesPacific Lowlandssect. <i>Geiseleria</i>Sierra Madre del SurTrans-Mexican Volcanic Belt
spellingShingle Victor W. Steinmann
A Synopsis of <em>Croton</em> (Euphorbiaceae) in Michoacán, Mexico
Taxonomy
Balsas Depression
new species
Pacific Lowlands
sect. <i>Geiseleria</i>
Sierra Madre del Sur
Trans-Mexican Volcanic Belt
title A Synopsis of <em>Croton</em> (Euphorbiaceae) in Michoacán, Mexico
title_full A Synopsis of <em>Croton</em> (Euphorbiaceae) in Michoacán, Mexico
title_fullStr A Synopsis of <em>Croton</em> (Euphorbiaceae) in Michoacán, Mexico
title_full_unstemmed A Synopsis of <em>Croton</em> (Euphorbiaceae) in Michoacán, Mexico
title_short A Synopsis of <em>Croton</em> (Euphorbiaceae) in Michoacán, Mexico
title_sort synopsis of em croton em euphorbiaceae in michoacan mexico
topic Balsas Depression
new species
Pacific Lowlands
sect. <i>Geiseleria</i>
Sierra Madre del Sur
Trans-Mexican Volcanic Belt
url https://www.mdpi.com/2673-6500/1/4/29
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