Abstract
A new haplostemonous species of Graptopetalum (subg. Glassia, Crassulaceae) from the Sierra de Coalcomán, Michoacán, is described and illustrated. It differs from its morphologically closest species, G. pentandrum, by having a smaller rosette diameter, broadly oblong leaves, its basal inflorescence branch with fewer flowers than in the rest of branches, a smaller flower diameter, wider petals, and its petal color pattern. It was assessed as Critically Endangered (CR) following the IUCN criteria. A key to the haplostemonous species of Graptopetalum (subg. Glassia) is provided.
References
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<p> https://doi.org/10.2307/3393365</p>
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<p> https://doi.org/10.3732/ajb.91.7.1099</p>
<p>Acevedo-Rosas, R., Sosa, V. & Lorea, F.G. (2004b) Phylogenetic relationships and morphological patterns in <em>Graptopetalum</em> (Crassulaceae). <em>Brittonia</em> 56: 185–194.</p>
<p> https://doi.org/10.1663/0007-196X(2004)056[0185:PRAMPI]2.0.CO;2</p>
<p>Arriaga, L., Espinoza, J.M, Aguilar, C., Martínez, E., Gómez, L. & Loa, E. (2000) <em>Regiones terrestres prioritarias de México</em>. Comisión Nacional para el Conocimiento y uso de la Biodiversidad, Mexico City, 580 pp.</p>
<p>Bachman, S., Moat, J., Hill, A.W., de la Torre, J. & Scott, B. (2011) Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool, Version BETA. e-Infrastructures for data publishing in biodiversity science. <em>ZooKeys</em> 150: 117–126.</p>
<p> https://doi.org/10.3897/zookeys.150.2109</p>
<p>Braun, A.C.H., Bouche, C.D. & Klotzsch, J.F. (1855) <em>Appendix Generum et Specierum Novarum et Minus Cognitarum quae in Horto Regio Botanico Berolinensi Coluntur</em>. Index Seminum in Horto Botanico Berolinensi, 589 pp.</p>
<p>Britton, N.L. & Rose, J.N. (1920) <em>The Cactaceae. Descriptions and illustrations of plants of the cactus family, Vol. 2</em>. Carnegie Institute, Washington, 248 pp.</p>
<p>Byalt, V.V. [Бялт, В.В.] (2012) Новая система рода <em>Graptopetalum</em> Rose (Crassulaceae) [A new system of the genus <em>Graptopetalum</em> Rose (Crassulaceae)]. <em>Новости систематики высших растений</em> [<em>Novitates Systematicae Plantarum Vascularium</em>] 43: 70–83.</p>
<p>Cházaro-Basáñez, M.J. & Thiede, J. (1995) Floristic and phytogeographic studies on the Crassulaceae of Jalisco (Mexico). <em>In</em>: T´Hart, H. & Eggli, U. (Eds.) <em>Evolution and systematics on the Crassulaceae</em>. Backhuys Publishers, Leiden, pp. 89–123.</p>
<p>Cházaro-Basáñez, M.J., García-Ruíz, I., Flores-Macías, A. & Machuca-Núñez, J.A. (2004) IN SITU: <em>Graptopetalum pentandrum</em> Moran. <em>International Cactus Adventures</em> 61: 12–17.</p>
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<p> https://doi.org/10.2307/2481438</p>
<p>Croat, T.B. (1983) A revision of the genus <em>Anthurium</em> (Araceae) of Mexico and Central America. Part I: Mexico and Middle America. <em>Annals of the Missouri Botanical Garden</em> 70: 211–420.</p>
<p> https://doi.org/10.2307/2399049</p>
<p>Croizat, L. (1943) <em>Pedilanthus</em>. Notes on American Euphorbiaceae. <em>Journal of the Washington Academy of Sciences</em> 33: 19.</p>
<p>Forman, L.L. (1987) A New Genus of Burseraceae from Mexico. <em>Kew Bulletin</em> 42: 262.</p>
<p> https://doi.org/10.2307/4109911</p>
<p>Foster, R.C. (1945) Miscellaneous diagnoses and transfers. <em>Contributions from the Gray Herbarium of Harvard University</em> 155: 64–70.</p>
<p>IUCN. (2019) Guidelines for using the IUCN Red List Categories and Criteria, version 14. Available from: http://www.iucnredlist.org/documents/RedListGuidelines.pdf (consulted November 2021)</p>
<p>Kimnach, M. (1987) A new succulent from Mexico: <em>Graptopetalum pentandrum</em> subsp. <em>superbum</em>. <em>Cactus & Succulent Journal of America</em> 59: 140–143.</p>
<p>Jiménez-Machorro, R. & Soto-Arenas, M.A. (1990) <em>Oncidium leleui</em>, una nueva especie de la costa pacífica mexicana. <em>Orquídea (Mexico City)</em> 12: 57–64.</p>
<p>Le Duc, A. (1992) A new species of <em>Mirabilis</em> (Nyctaginaceae) from Michoacan, Mexico. <em>Sida</em> 15: 53–55.</p>
<p>Linnaeus, C. (1759) <em>Epidendrum ciliare</em>. <em>Systema Naturae, Editio Decima</em> 2: 1246.</p>
<p>Madrigal-Sánchez, X. & Caballero-Deloya, M. (1969) Una nueva especie mexicana de <em>Pinus</em>. <em>Boletín Técnico del Instituto Nacional de Investigaciones Forestales</em> 26.</p>
<p>Moran, R. (1971) <em>Graptopetalum pentandrum</em>: a new species of Mexico. <em>Cactus and Succulent Journal (US) </em>43: 255–258.</p>
<p>Morrone, J.J., Escalante, T. & Rodríguez-Tapia, G. (2017) Mexican biogeographic provinces: Map and shapefiles. <em>Zootaxa</em> 4277 (2): 277–279.</p>
<p> https://doi.org/10.11646/zootaxa.4277.2.8</p>
<p>NaturaLista. (2019) <em>Graptopetalum glassii</em>. Available from: http://www.naturalista.mx/taxa/1145953-Graptopetalum-glassii (consulted November 2021).</p>
<p>Robinson, H. & Brettell, R.D. (1973) Studies in the Senecioneae (Asteraceae). I. The genus <em>Pittocaulon</em>. <em>Phytologia</em> 26: 451–453.</p>
<p>Rose, J.N. (1911) <em>Graptopetalum</em>, a new genus, Crassulaceae. <em>Contributions from the United States National Herbarium</em> 13: 296–298.</p>
<p>Santiago-Alvarado, M., Montaño-Arias, G. & Espinosa, D. (2016) Áreas de endemismo de la Sierra Madre del Sur. <em>In</em>: Luna-Vega, I., Espinosa, D. & Contreras-Medina, R. (Eds.) <em>Biodiversidad de la Sierra Madre del Sur</em>. Universidad Nacional Autónoma de México, Mexico City, pp. 431–448.</p>
<p>Steinmann, V.W. (2003) La inclusión de <em>Pedilanthus</em> en <em>Euphorbia</em> (Euphorbiaceae). <em>Acta Botanica Mexicana</em> 65: 45–50.</p>
<p> https://doi.org/10.21829/abm65.2003.961</p>
<p>Steinmann, V.W. & Ramírez-Amezcua, Y. (2013) <em>Bia manuelii</em> (Euphorbiaceae: Acalyphoideae), a new species from Sierra de Coalcomán, Michoacán, Mexico. <em>Revista Mexicana de Biodiversidad</em> 84: 746–750.</p>
<p> https://dx.doi.org/10.7550/rmb.32014</p>
<p>Thiede, J. (2003) <em>Graptopetalum</em>. <em>In</em>: Eggli, U. (Ed.) <em>Illustrated handbook of succulent plants, Vol. VI, Crassulaceae</em>. Springer, Berlin/Heidelberg, pp. 128–134.</p>
<p> https://doi.org/10.2307/2657129</p>
<p>Thiede, J. & Eggli, U. (2007) Crassulaceae. <em>In</em>: Kubitzki, K. (Ed.) <em>The families and genera of vascular plants, Volume 9</em>. Springer, Berlin/Heidelberg, pp. 83–118.</p>
<p> https://doi.org/10.1007/978-3-540-32219-1_12</p>
<p>Uhl, C. (1970) Chromosomes of <em>Graptopetalum</em> and <em>Thompsonella</em> (Crassulaceae). <em>American Journal of Botany</em> 57: 1115–1121.</p>
<p> https://doi.org/10.1002/j.1537-2197.1970.tb09915.x</p>
<p>Vázquez-García, J.A., Muñiz-Castro, M.Á., Sahagún-Godínez, E., Cházaro-Basáñez, M.J., De Castro-Arce, E., Nieves-Hernández, G. & Padilla-Lepe, J. (2013) Four New Species of <em>Agave</em> (Agavaceae) of the <em>Marmoratae</em> Group. <em>Systematic Botany</em> 38: 320–331.</p>
<p> https://doi.org/10.1600/036364413X666642</p>
<p>Vázquez-García, J.A., Acevedo-Rosas, R., Cházaro-Basáñez, M.J., Nieves-Hernández, G. & Sahagún-Godínez, E. (2021) <em>Graptopetalum rosanevadoense </em>(Crassulaceae): A new haplostemonous species from the Nevado de Colima, Jalisco, Mexico. <em>Phytotaxa</em> 496: 159–169.</p>
<p> https://doi.org/10.11646/phytotaxa.496.2.5</p>
<p>Vázquez-García, J.A., Rosales-Martínez, C.S. & Acevedo-Rosas, R. (2022) <em>Graptopetalum trujilloi</em> (Crassulaceae), a new haplostemonous and critically endangered species endemic to western Mexico: comments on taxa of subg. <em>Glassia</em>. <em>Phytotaxa</em> 532: 275–287.</p>
<p> https://doi.org/10.11646/phytotaxa.532.3.5</p>
<p>Vega-Aviña, R., Delgado-Vargas, F. & Pío-León, J.F. (2020) <em>Graptopetalum sinaloensis </em>(Crassulaceae), una nueva especie de Sinaloa, México. <em>Acta Botánica Mexicana</em> 127: e1550.</p>
<p> https://doi.org/10.21829/abm127.2020.1550</p>
<p> https://doi.org/10.2307/3393365</p>
<p>Acevedo-Rosas, R., Cameron, K., Sosa, V. & Pell, S. (2004a) A molecular phylogenetic study of <em>Graptopetalum</em> (Crassulaceae) based on ETS, ITS, rpl16, and trnL-F nucleotide sequences. <em>American Journal of Botany</em> 91: 1099–1104.</p>
<p> https://doi.org/10.3732/ajb.91.7.1099</p>
<p>Acevedo-Rosas, R., Sosa, V. & Lorea, F.G. (2004b) Phylogenetic relationships and morphological patterns in <em>Graptopetalum</em> (Crassulaceae). <em>Brittonia</em> 56: 185–194.</p>
<p> https://doi.org/10.1663/0007-196X(2004)056[0185:PRAMPI]2.0.CO;2</p>
<p>Arriaga, L., Espinoza, J.M, Aguilar, C., Martínez, E., Gómez, L. & Loa, E. (2000) <em>Regiones terrestres prioritarias de México</em>. Comisión Nacional para el Conocimiento y uso de la Biodiversidad, Mexico City, 580 pp.</p>
<p>Bachman, S., Moat, J., Hill, A.W., de la Torre, J. & Scott, B. (2011) Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool, Version BETA. e-Infrastructures for data publishing in biodiversity science. <em>ZooKeys</em> 150: 117–126.</p>
<p> https://doi.org/10.3897/zookeys.150.2109</p>
<p>Braun, A.C.H., Bouche, C.D. & Klotzsch, J.F. (1855) <em>Appendix Generum et Specierum Novarum et Minus Cognitarum quae in Horto Regio Botanico Berolinensi Coluntur</em>. Index Seminum in Horto Botanico Berolinensi, 589 pp.</p>
<p>Britton, N.L. & Rose, J.N. (1920) <em>The Cactaceae. Descriptions and illustrations of plants of the cactus family, Vol. 2</em>. Carnegie Institute, Washington, 248 pp.</p>
<p>Byalt, V.V. [Бялт, В.В.] (2012) Новая система рода <em>Graptopetalum</em> Rose (Crassulaceae) [A new system of the genus <em>Graptopetalum</em> Rose (Crassulaceae)]. <em>Новости систематики высших растений</em> [<em>Novitates Systematicae Plantarum Vascularium</em>] 43: 70–83.</p>
<p>Cházaro-Basáñez, M.J. & Thiede, J. (1995) Floristic and phytogeographic studies on the Crassulaceae of Jalisco (Mexico). <em>In</em>: T´Hart, H. & Eggli, U. (Eds.) <em>Evolution and systematics on the Crassulaceae</em>. Backhuys Publishers, Leiden, pp. 89–123.</p>
<p>Cházaro-Basáñez, M.J., García-Ruíz, I., Flores-Macías, A. & Machuca-Núñez, J.A. (2004) IN SITU: <em>Graptopetalum pentandrum</em> Moran. <em>International Cactus Adventures</em> 61: 12–17.</p>
<p>Clausen, R.T. (1943) The section <em>Sedastrum</em> of <em>Sedum</em>. <em>Bulletin of the Torrey Botanical Club</em> 70: 289–296.</p>
<p> https://doi.org/10.2307/2481438</p>
<p>Croat, T.B. (1983) A revision of the genus <em>Anthurium</em> (Araceae) of Mexico and Central America. Part I: Mexico and Middle America. <em>Annals of the Missouri Botanical Garden</em> 70: 211–420.</p>
<p> https://doi.org/10.2307/2399049</p>
<p>Croizat, L. (1943) <em>Pedilanthus</em>. Notes on American Euphorbiaceae. <em>Journal of the Washington Academy of Sciences</em> 33: 19.</p>
<p>Forman, L.L. (1987) A New Genus of Burseraceae from Mexico. <em>Kew Bulletin</em> 42: 262.</p>
<p> https://doi.org/10.2307/4109911</p>
<p>Foster, R.C. (1945) Miscellaneous diagnoses and transfers. <em>Contributions from the Gray Herbarium of Harvard University</em> 155: 64–70.</p>
<p>IUCN. (2019) Guidelines for using the IUCN Red List Categories and Criteria, version 14. Available from: http://www.iucnredlist.org/documents/RedListGuidelines.pdf (consulted November 2021)</p>
<p>Kimnach, M. (1987) A new succulent from Mexico: <em>Graptopetalum pentandrum</em> subsp. <em>superbum</em>. <em>Cactus & Succulent Journal of America</em> 59: 140–143.</p>
<p>Jiménez-Machorro, R. & Soto-Arenas, M.A. (1990) <em>Oncidium leleui</em>, una nueva especie de la costa pacífica mexicana. <em>Orquídea (Mexico City)</em> 12: 57–64.</p>
<p>Le Duc, A. (1992) A new species of <em>Mirabilis</em> (Nyctaginaceae) from Michoacan, Mexico. <em>Sida</em> 15: 53–55.</p>
<p>Linnaeus, C. (1759) <em>Epidendrum ciliare</em>. <em>Systema Naturae, Editio Decima</em> 2: 1246.</p>
<p>Madrigal-Sánchez, X. & Caballero-Deloya, M. (1969) Una nueva especie mexicana de <em>Pinus</em>. <em>Boletín Técnico del Instituto Nacional de Investigaciones Forestales</em> 26.</p>
<p>Moran, R. (1971) <em>Graptopetalum pentandrum</em>: a new species of Mexico. <em>Cactus and Succulent Journal (US) </em>43: 255–258.</p>
<p>Morrone, J.J., Escalante, T. & Rodríguez-Tapia, G. (2017) Mexican biogeographic provinces: Map and shapefiles. <em>Zootaxa</em> 4277 (2): 277–279.</p>
<p> https://doi.org/10.11646/zootaxa.4277.2.8</p>
<p>NaturaLista. (2019) <em>Graptopetalum glassii</em>. Available from: http://www.naturalista.mx/taxa/1145953-Graptopetalum-glassii (consulted November 2021).</p>
<p>Robinson, H. & Brettell, R.D. (1973) Studies in the Senecioneae (Asteraceae). I. The genus <em>Pittocaulon</em>. <em>Phytologia</em> 26: 451–453.</p>
<p>Rose, J.N. (1911) <em>Graptopetalum</em>, a new genus, Crassulaceae. <em>Contributions from the United States National Herbarium</em> 13: 296–298.</p>
<p>Santiago-Alvarado, M., Montaño-Arias, G. & Espinosa, D. (2016) Áreas de endemismo de la Sierra Madre del Sur. <em>In</em>: Luna-Vega, I., Espinosa, D. & Contreras-Medina, R. (Eds.) <em>Biodiversidad de la Sierra Madre del Sur</em>. Universidad Nacional Autónoma de México, Mexico City, pp. 431–448.</p>
<p>Steinmann, V.W. (2003) La inclusión de <em>Pedilanthus</em> en <em>Euphorbia</em> (Euphorbiaceae). <em>Acta Botanica Mexicana</em> 65: 45–50.</p>
<p> https://doi.org/10.21829/abm65.2003.961</p>
<p>Steinmann, V.W. & Ramírez-Amezcua, Y. (2013) <em>Bia manuelii</em> (Euphorbiaceae: Acalyphoideae), a new species from Sierra de Coalcomán, Michoacán, Mexico. <em>Revista Mexicana de Biodiversidad</em> 84: 746–750.</p>
<p> https://dx.doi.org/10.7550/rmb.32014</p>
<p>Thiede, J. (2003) <em>Graptopetalum</em>. <em>In</em>: Eggli, U. (Ed.) <em>Illustrated handbook of succulent plants, Vol. VI, Crassulaceae</em>. Springer, Berlin/Heidelberg, pp. 128–134.</p>
<p> https://doi.org/10.2307/2657129</p>
<p>Thiede, J. & Eggli, U. (2007) Crassulaceae. <em>In</em>: Kubitzki, K. (Ed.) <em>The families and genera of vascular plants, Volume 9</em>. Springer, Berlin/Heidelberg, pp. 83–118.</p>
<p> https://doi.org/10.1007/978-3-540-32219-1_12</p>
<p>Uhl, C. (1970) Chromosomes of <em>Graptopetalum</em> and <em>Thompsonella</em> (Crassulaceae). <em>American Journal of Botany</em> 57: 1115–1121.</p>
<p> https://doi.org/10.1002/j.1537-2197.1970.tb09915.x</p>
<p>Vázquez-García, J.A., Muñiz-Castro, M.Á., Sahagún-Godínez, E., Cházaro-Basáñez, M.J., De Castro-Arce, E., Nieves-Hernández, G. & Padilla-Lepe, J. (2013) Four New Species of <em>Agave</em> (Agavaceae) of the <em>Marmoratae</em> Group. <em>Systematic Botany</em> 38: 320–331.</p>
<p> https://doi.org/10.1600/036364413X666642</p>
<p>Vázquez-García, J.A., Acevedo-Rosas, R., Cházaro-Basáñez, M.J., Nieves-Hernández, G. & Sahagún-Godínez, E. (2021) <em>Graptopetalum rosanevadoense </em>(Crassulaceae): A new haplostemonous species from the Nevado de Colima, Jalisco, Mexico. <em>Phytotaxa</em> 496: 159–169.</p>
<p> https://doi.org/10.11646/phytotaxa.496.2.5</p>
<p>Vázquez-García, J.A., Rosales-Martínez, C.S. & Acevedo-Rosas, R. (2022) <em>Graptopetalum trujilloi</em> (Crassulaceae), a new haplostemonous and critically endangered species endemic to western Mexico: comments on taxa of subg. <em>Glassia</em>. <em>Phytotaxa</em> 532: 275–287.</p>
<p> https://doi.org/10.11646/phytotaxa.532.3.5</p>
<p>Vega-Aviña, R., Delgado-Vargas, F. & Pío-León, J.F. (2020) <em>Graptopetalum sinaloensis </em>(Crassulaceae), una nueva especie de Sinaloa, México. <em>Acta Botánica Mexicana</em> 127: e1550.</p>
<p> https://doi.org/10.21829/abm127.2020.1550</p>