Editing Dioscorea (section)

== Description ==
They are [[tuber]]ous [[herbaceous]] [[perennial plant|perennial]] [[liana]]s, growing to {{convert|2–12|m|ft}} or more tall. The [[leaf|leaves]] are spirally arranged, mostly broad heart-shaped. The [[flower]]s are individually inconspicuous, greenish-yellow, with six petals; they are mostly [[plant sexuality|dioecious]], with separate male and female plants, though a few species are [[plant sexuality|monoecious]], with male and female flowers on the same plant. The [[fruit]] is a [[capsule (fruit)|capsule]] in most species, a soft [[berry (botany)|berry]] in a few species.<ref>{{Cite web|url=http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=110295|title=Dioscorea in Flora of North America @ efloras.org|website=www.efloras.org|access-date=2017-01-23}}</ref><ref>{{Cite web|url=http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=110295|title=Dioscorea in Flora of China @ efloras.org|website=www.efloras.org|access-date=2017-01-23}}</ref>

Most ''Dioscorea'' species that have been examined possess [[extrafloral nectaries]] at the petiole or leaf underside.<ref>{{cite journal |date=2012-10-18 |first1=Marjorie G. |last1=Weber |first2=Kathleen H. |last2=Keeler |title=The phylogenetic distribution of extrafloral nectaries in plants |pages=1251–1261 |doi=10.1093/aob/mcs225 |journal=Annals of Botany |eissn=1095-8290 |volume=111 |issue=6|pmid=23087129 |pmc=3662505 }}</ref>