Bryant Jacob, Vazquez-Alonso Mariana, Tepe Eric J
Department of Biological Sciences, University of Cincinnati, Cincinnati, Ohio 45221, USA University of Cincinnati Cincinnati United States of America.
Department of Botany, Connecticut College, New London, Connecticut 06320, USA Connecticut College New London, Connecticut United States of America.
PhytoKeys. 2025 Apr 4;255:1-22. doi: 10.3897/phytokeys.255.140014. eCollection 2025.
, of the Sierra Madre del Sur ecoregion of South-Central Mexico, is a viny, node-rooting species of the Potato clade, in the subclade Solanumsect.Anarrhichomenum. is distinguished from its relatives by possessing long and narrow, lanceolate, ovate to falcate, 1-3-foliate leaves with (5-)7-10 secondary veins; large, persistent pseudo-stipules found at nearly every node on herbarium material; and white, violet-tinged corollas particularly pronounced in the floral bud. is functionally dioecious, producing functional, tricolporate pollen and non-functional, inaperturate pollen in short and long-styled flowers, respectively, joining its close relative as one of only two documented dioecious species in the entire Potato clade. Separation of from its closest ally, the simple-leaved , is based on morphometric and geographic evidence presented here.
它生长在墨西哥中南部的马德雷山脉南生态区，是马铃薯分支中一种具卷须、节生根的物种，属于茄属sect. Anarrhichomenum亚分支。它与亲缘物种的区别在于具有狭长的披针形、卵形至镰形、具1 - 3片小叶且有（5 -）7 - 10条次生脉的叶子；在标本材料上几乎每个节处都有大的、宿存的假托叶；以及白色、带紫色调的花冠，在花芽中尤为明显。它在功能上是雌雄异株的，分别在短花柱花和长花柱花中产生有功能的三沟花粉和无功能的无萌发孔花粉，与它的近缘种一起成为整个马铃薯分支中仅有的两个有记录的雌雄异株物种之一。基于此处提供的形态测量和地理证据，将它与其最亲近的单叶近缘种区分开来。
