The genus Houssayanthus (Sapindaceae) in Mexico
Two Mexican species of the family Sapindaceae are best placed in the genus Houssayanthus, originally proposed by Hunziker for a group of South American plants bearing vegetative characters and fruits of structure and consistence similar to those of Serjania, but with central locules, as in the fruit...
| Hoofdauteurs: | , |
|---|---|
| Formaat: | Online |
| Taal: | spa |
| Gepubliceerd in: |
Instituto de Ecología, A.C.
2006
|
| Online toegang: | https://abm.ojs.inecol.mx/index.php/abm/article/view/1021 |
| _version_ | 1799771266101542912 |
|---|---|
| author | Rzedowski, Jerzy Calderón de Rzedowski, Graciela |
| author_facet | Rzedowski, Jerzy Calderón de Rzedowski, Graciela |
| author_sort | Rzedowski, Jerzy |
| collection | ABM |
| description | Two Mexican species of the family Sapindaceae are best placed in the genus Houssayanthus, originally proposed by Hunziker for a group of South American plants bearing vegetative characters and fruits of structure and consistence similar to those of Serjania, but with central locules, as in the fruits of Urvillea. Houssayanthus serjanioides, described as a new species, is a predominantly herbaceous prostrate or scandent plant, inhabiting preferably oak forests in the northeastern part of the state of Queretaro and in the Guadalcazar region of the state of San Luis Potosi. Urvillea biternata Weatherby, a species known only from the state of Guerrero and described in absence of mature fruits, is also transferred to Houssayanthus. Both Mexican species differ from the South American ones in their essentially biternate (not 3-foliolate or pinnate) leaves and in their embryos with unequal and slightly curved (not subequal and more or less straight) cotyledons. A historical summary of the knowledge of Houssayanthus is presented, as well as an emended description of the genus and a key to separate the five known species, emphasizing the apparent lack of close relationship between several of them. |
| format | Online |
| id | oai:oai.abm.ojs.inecol.mx:article-1021 |
| institution | Acta Botanica Mexicana |
| language | spa |
| publishDate | 2006 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.abm.ojs.inecol.mx:article-10212022-12-24T04:35:23Z The genus Houssayanthus (Sapindaceae) in Mexico El género Houssayanthus (Sapindaceae) en México Rzedowski, Jerzy Calderón de Rzedowski, Graciela Houssayanthus Mexico Sapindaceae Serjania Urvillea Houssayanthus México Sapindaceae Serjania Urvillea Two Mexican species of the family Sapindaceae are best placed in the genus Houssayanthus, originally proposed by Hunziker for a group of South American plants bearing vegetative characters and fruits of structure and consistence similar to those of Serjania, but with central locules, as in the fruits of Urvillea. Houssayanthus serjanioides, described as a new species, is a predominantly herbaceous prostrate or scandent plant, inhabiting preferably oak forests in the northeastern part of the state of Queretaro and in the Guadalcazar region of the state of San Luis Potosi. Urvillea biternata Weatherby, a species known only from the state of Guerrero and described in absence of mature fruits, is also transferred to Houssayanthus. Both Mexican species differ from the South American ones in their essentially biternate (not 3-foliolate or pinnate) leaves and in their embryos with unequal and slightly curved (not subequal and more or less straight) cotyledons. A historical summary of the knowledge of Houssayanthus is presented, as well as an emended description of the genus and a key to separate the five known species, emphasizing the apparent lack of close relationship between several of them. Dos especies mexicanas de la familia Sapindaceae encuentran su mejor acomodo en el género Houssayanthus, propuesto originalmente por Hunziker para un grupo de plantas sudamericanas con características vegetativas y frutos de estructura propia de los de Serjania, pero con los lóculos de posición central, a semejanza de los de Urvillea. Se describe como nuevo a Houssayanthus serjanioides, elemento por lo general herbáceo, rastrero o trepador, habitante preferencial de encinares en el noreste de Querétaro y en la región de Guadalcázar, San Luis Potosí. También se transfiere Urvillea biternata Weatherby a Houssayanthus. Esta planta solamente se ha coleccionado en el estado de Guerrero y originalmente se había dado a conocer basándose en ejemplares carentes de frutos maduros. Las dos especies mexicanas difieren de las sudamericanas en sus hojas esencialmente biternadas (no trifolioladas o pinnadas) y en sus embriones con los cotiledones desiguales y uno de ellos ligeramente encorvado (no subiguales y más o menos rectos). Se proporciona asimismo una relación histórica del conocimiento de Houssayanthus, una descripción modificada del género, así como una clave para diferenciar sus cinco especies hasta ahora definidas, enfatizando la aparente falta de relaciones muy estrechas entre varias de ellas. Instituto de Ecología, A.C. 2006-07-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion artículo evaluado por pares application/pdf https://abm.ojs.inecol.mx/index.php/abm/article/view/1021 10.21829/abm76.2006.1021 Acta Botanica Mexicana; No. 76 (2006); 89-98 Acta Botanica Mexicana; Núm. 76 (2006); 89-98 2448-7589 0187-7151 spa https://abm.ojs.inecol.mx/index.php/abm/article/view/1021/1182 Derechos de autor 2016 Acta Botanica Mexicana https://creativecommons.org/licenses/by-nc/4.0 |
| spellingShingle | Rzedowski, Jerzy Calderón de Rzedowski, Graciela The genus Houssayanthus (Sapindaceae) in Mexico |
| title | The genus Houssayanthus (Sapindaceae) in Mexico |
| title_full | The genus Houssayanthus (Sapindaceae) in Mexico |
| title_fullStr | The genus Houssayanthus (Sapindaceae) in Mexico |
| title_full_unstemmed | The genus Houssayanthus (Sapindaceae) in Mexico |
| title_short | The genus Houssayanthus (Sapindaceae) in Mexico |
| title_sort | genus houssayanthus (sapindaceae) in mexico |
| url | https://abm.ojs.inecol.mx/index.php/abm/article/view/1021 |
| work_keys_str_mv | AT rzedowskijerzy thegenushoussayanthussapindaceaeinmexico AT calderonderzedowskigraciela thegenushoussayanthussapindaceaeinmexico AT rzedowskijerzy elgenerohoussayanthussapindaceaeenmexico AT calderonderzedowskigraciela elgenerohoussayanthussapindaceaeenmexico AT rzedowskijerzy genushoussayanthussapindaceaeinmexico AT calderonderzedowskigraciela genushoussayanthussapindaceaeinmexico |
