EmergentAnarchy moved page User:EmergentAnarchy/Polystemma atreyui to Polystemma atreyui Move to mainspaceNew page{{Short description|Species of flowering plant}}{{Speciesbox|image= Polystemma atreyui 01.jpg|image_alt= A brownish flower with five petals and a black centre|status=|status_system=|status_ref = |genus= Polystemma|species= atreyui|authority= Pío-León, L.O.Alvarado & S.Islas}}'''''Polystemma atreyui''''' is a species of flowering plant in the family [[Apocynaceae]]. It is a [[perennial]] climbing plant with green to blackish-brown flowers. The species is native to Mexico, and was described in 2024.==Taxonomy==''Polystemma atreyui'' was described by Juan Fernando Pío-León, Leonardo Osvaldo Alvarado-Cárdenas, and Sofia Islas-Hernández in 2024.{{IPNI|id=77349921-1|taxon=Polystemma atreyui|authority=Pío-León, L.O.Alvarado & S.Islas}}==Distribution==''Polystemma atreyui'' is native to the seasonally dry tropical biome of [[Sinaloa]] and [[Durango]], Mexico.{{Cite POWO|id=urn:lsid:ipni.org:names:77349921-1|title=''Polystemma atreyui''|access-date=2026-10-29}} It grows in [[tropical deciduous forest]]s, at elevations of {{Convert|30-650|m|ft}}.{{cite journal |last1=Alvarado-Cárdenas |first1=Leonardo O. |last2=Pío-León |first2=Juan Fernando |last3=Sánchez-Sánchez |first3=Cristóbal |last4=Islas-Hernández |first4=Carla Sofia |title=Synopsis of the genus Polystemma (Apocynaceae, Asclepiadoideae) and recognition of three new species |journal=Botanical Sciences |date=21 September 2024 |volume=102 |issue=4 |pages=1318-1352 |doi=10.17129/botsci.3502 |url=https://www.botanicalsciences.com.mx/index.php/botanicalSciences/article/view/3502 |access-date=30 October 2026}}''Polystemma atreyui'' is found near ''[[Bursera grandifolia]]'', ''[[Bursera laxiflora]]'', ''[[Guazuma ulmifolia]]'', ''[[Haematoxylum brasiletto]]'', ''[[Jatropha curcas]]'', ''[[Ipomoea arborescens]]'', ''[[Lysiloma divaricatum]]'', ''[[Maclura tinctoria]]'', and ''[[Randia (plant)|Randia]]''.==Description==''Polystemma atreyui'' is a [[perennial]] climbing plant. The stems are cylindrical, and have long, simple [[trichome]]s.The leaves are ovate, {{Convert|3.2-6.4|cm|in}} long, and {{Convert|2.4-5.3|cm|in}} wide. The leaves have lobes which are {{Convert|6-8|mm|in}} long, and {{Convert|1.0-1.3|cm|in}} wide. The leaf edges are smooth. The leaves grow on {{Convert|4-6|cm|in}} long stems.The [[inflorescence]]s are [[Corymb|corymbiform]] [[cyme (botany)|cyme]]s with six to ten flowers. The inflorescence stems are {{Convert|5.5-10.0|mm|in}} long. The flowers are green to blackish-brown, divided into five parts, and grow on {{Convert|2.1-3.03|mm|in}} long stems. The [[calyx (botany)|calyx]] has [[sepal]]s which are fused at the base, and a {{Convert|0.6-1.0|mm|in}} long tube. The calyx lobes are lanceolate, {{Convert|3.3-4.1|mm|in}} long, and {{Convert|1.2-1.5|mm|in}} wide. The [[corolla (botany)|corolla]] is circular and flattened, and {{Convert|2.7-3.2|cm|in}} wide. The corolla tube is {{Convert|2.5-4.3|mm|in}} long, and {{Convert|2.8-3.1|mm|in}} wide. The plant flowers from late July to early September.Mature fruits have been observed in October.''Polystemma atreyui'' is similar to ''[[Polystemma galindoi]]''.==Etymology==''Polystemma atreyui'' is named after [[List_of_The_Neverending_Story_characters#Atreyu|Atreyu]], a character from ''[[The Neverending Story]]''. The describing authors wrote that the character's story was "similar to [their] own work as botanists".==References=={{Reflist}}{{Taxonbar|from=Q141917677}}[[Category:Asclepiadoideae]][[Category:Plants described in 2024]][[Category:Flora of Sinaloa]][[Category:Flora of Durango]][[Category:Endemic flora of Mexico]]