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|species = baldwyniana
|authority = (Sweet) [[Robert Everard Woodson Jr.|Woodson]]
|synonyms={{Collapsible list|
{{Species list
|Gonolobus baldwynianus|Sweet
|Odontostephana baldwyniana|(Sweet) Alexander
|Vincetoxicum baldwynianum|(Sweet) Britton
|Gonolobus caronlinensis|Nutt.
}}
}}
|synonyms_ref=<ref>{{cite web |title=Matelea baldwyniana (Sweet) Woodson {{!}} Plants of the World Online {{!}} Kew Science |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:154488-2#synonyms |website=Plants of the World Online |language=en}}</ref>
}}
'''''Matelea baldwyniana''''' is a species of
==Description==
''M. baldwyniana'' is a [[perennial]] [[herbaceous]] vine that climbs or trails on other vegetation, reaching a height of about {{cvt |3|m|ft|0|}}. The stems are brownish, hairy, and have a milky sap. The leaves are green, broadly ovate, and opposite, with smooth margins. The leaves are {{cvt |5-16|cm|in|0|}} long on hairy [[petiole (botany)|petioles]] that are {{cvt |5-6|cm|in|0|}} long.<ref name="MO"/>
The flowers, borne in clusters of 15 or more on long [[peduncle (botany)|peduncles]], are white with a disc-like central column with five [[anthers]] and five twisting white petals that are joined at the base. Seed pods are {{cvt |6.5-9|cm|in|1}} long and contain flat, round seeds with many long, white hairs, similar to other milkweeds.<ref name="ANPS">{{cite web |title=Know Your Natives – Baldwin’s Climbing Milkweed and Anglepod Milkvine |url=https://anps.org/2014/10/26/know-your-natives-baldwins-climbing-milkweed-and-anglepod-milkvine/ |website=Arkansas Native Plant Society |language=en |date=26 October 2014}}</ref>
==Etymology==
The specific epithet honors American botanist [[William Baldwin (botanist)|William Baldwin]] (1779 - 1819).<ref>{{cite web |title=Baldwyn's Milkvine |url=https://www.fs.usda.gov/wildflowers/plant-of-the-week/matelea_baldwyniana.shtml |website=www.fs.usda.gov}}</ref>
==Distribution and habitat==
''Matelea baldwyniana'' is native to the central and southeastern United States in the states of Oklahoma, Arkansas, Missouri, Mississippi, Alabama, Georgia, and Florida.<ref>{{cite web |title=2013 BONAP North American Plant Atlas. TaxonMaps |url=http://bonap.net/Napa/TaxonMaps/Genus/County/Matelea |website=bonap.net}}</ref> The plant is mostly present in Arkansas and Missouri, with only isolated populations or historical references in the other states.<ref name="natureserve">{{cite web |title=NatureServe Explorer 2.0 |url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.147922/Matelea_baldwyniana |website=explorer.natureserve.org}}</ref> Its habitat is forest clearings, woods, slopes of ravines,<ref name="AL"/> glades, and savannas.<ref name="MO">{{cite web |title=Matelea baldwyniana page |url=https://www.missouriplants.com/Matelea_baldwyniana_page.html |website=www.missouriplants.com}}</ref>
==Ecology==
Flowering occurs April to June. ''M. baldwyniana'' is a host plant for caterpillars of the [[monarch butterfly]].<ref name="ANPS"/>
==References==
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[[Category:Matelea|baldwyniana]]
[[Category:Flora of the Southeastern United States]]
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