Ampelamus laevis (Cynanchum laeve) (Honey-Vine Climbing Milkweed, Etc.)

Ampelamus laevis (Honey-Vine Climbing Milkweed) on 6-26-22, #901-1.

Honey-Vine Climbing Milkweed,  Sand Vine, Honey Vine, Blue Vines Milkweed, Honeyvine Milkweed

Ampelamus laevis

am-PEL-uh-mus  LEE-viss/LAY-viss

OR

Cynanchum laeve

sigh-NAN-chum  LEE-vey

Synonyms of Ampelamus laevis (10) (Updated on 7-31-22 from Plants of the World Online): Ampelamus albidus (Nutt.) Britton, Ampelamus riparius Raf., Cynanchum laeve (Michx.) Pers.Enslenia albida Nutt., Enslenia cinerea Spreng., Gonolobus laevis Michx., Gonolobus nuttallianus Spreng., Gonolobus nuttallii Decne., Gonolobus viridiflorus Nutt., Vincetoxicum gonocarpos var. laevis (Michx.) Britton

Ampelamus laevis (Michx.) Krings is an accepted scientific name for this species. It was named and described as such by Alexander Krings in Sida; Contributions to Botany in 2001. It was first named and described as Gonolobus laevis by André Michaux in Flora Boreali-Americana in 1803.

Cynanchum laeve (Michx.) Pers. is a commonly used scientific name for the species. It was named and described as such by Christiaan Hendrik Persoon in Synopsis Plantarum in 1805.

There is an ongoing controversy over several species of plants and this species happens to be one of them. Some databases and websites say the accepted name is Ampelamus laevis with Cynanchum laeve as a synonym. Others say the opposite. Both sides have their point of view based on various publications. Then again, everyone who named the other synonyms had their point of view as well. I normally stick with what Plants of the World Online says because I think they are the most up-to-date. After reading both of the valid original publications I don’t see much proof of what the species should be named as far as what makes it an Ampelamus or Cynanchum… Then again, I am not a botanist. If you want to read the original publications, go to the bottom of the page, click on the species name next to IPNI, then click on BHL (Biodiversity Heritage Library). To me, if someone is proposing a name change, they should have a good reason. Just remember, scientific names are “accepted” names and not necessarily “correct” names. Even the synonyms were validly published names.

The genus, Ampelamus Raf., was named and described by Constantine Samuel Rafinesque in American Monthly Magazine and Critical Review in 1819.

The genus, Cynanchum L., was named and described by Carl von Linnaeus in the first volume of the first edition of Species Plantarum in 1753.

As of 7-31-22 when I am updating this page, Plants of the World Online by Kew lists three species in the Ampelamus genus. It is a member of the plant family Apocynaceae with 369 genera. Those numbers could change as POWO makes updates.

Distribution map of Ampelamus laevis from Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://www.plantsoftheworldonline.org/. Retrieved on July 31, 2022.

The above distribution map for Ampelamus laevis is from Plants of the World Online by Kew. Areas in green are where the species is native. The map on the USDA Plants Database is the same but shows the species as introduced in Ontario, Canada instead of being a native.

The map on iNaturalist shows where members have made observations. Anyone can join and it is a great website to confirm and share your observations. The maps on iNaturalist are continually updated as members post new observations. The iNaturalist website uses the name Cynanchum laeve.

THERE ARE SEVERAL LINKS AT THE BOTTOM OF THE PAGE FOR FURTHER READING AND TO HELP WITH A POSITIVE ID.

Ampelamus laevis (Honey-Vine Climbing Milkweed) on 6-26-22, #901-2.

When I was a kid, I remember morning glories coming up in the garden and climbing on the sweet corn. The same is true here in the garden… The first “weeds” to come up after the garden is tilled are the morning glories. Ummm. Except for one thing… In 2021, there was one climbing on the asparagus, and a few were on the sweet corn. I thought they were morning glories and I could get some photos so I let them grow. Well, when they flowered, they were NOT morning glories at all. They turned out to be Ampelamus laevis, the Honey-Vine Climbing Milkweed. I didn’t get good photos in 2021, but they came up in the ditch along the street in front of the garden so I took photos.

Ampelamus laevis (Honey-Vine Climbing Milkweed) on 6-26-22, #901-3.

I apologize for not writing descriptions yet, but I have been fairly busy. I will write descriptions as soon as I have time. I have some catching up to do along with everyday stuff…

There are several links at the bottom of the page for further information and descriptions. Just don’t worry about the difference in scientific names, it’s still the same species. Maybe someday everyone will be in agreement. 🙂

Ampelamus laevis (Honey-Vine Climbing Milkweed) on 6-26-22, #901-4.

 

Ampelamus laevis (Honey-Vine Climbing Milkweed) on 6-26-22, #901-5.

 

Ampelamus laevis (Honey-Vine Climbing Milkweed) on 6-26-22, #901-6.

 

Ampelamus laevis (right) and Convolvulus arvensis (left) on 7-26-22.

The above photo is of Ampelamus laevis (Honey-Vine Climbing Milkweed) on the right, and Convolvulus arvensis (Field Bindweed) on the left. They were growing together in the ditch.

I’ll probably take more photos including fruit and seeds.

I have enjoyed photographing and learning about the many wildflowers growing on the farm and in other areas nearby. My farm is in Windsor, Missouri in Pettis County (Henry County is across the street, and Benton and Johnson aren’t far away). I have grown over 500 different plants and identified over 200 species of wildflowers (most have pages listed on the right side of the page). I am not an expert, botanist, or horticulturalist. I just like growing, photographing, and writing about my experience. I rely on several websites for ID and a few horticulturalists I contact if I cannot figure them out. Wildflowers can be somewhat variable from location to location, so sometimes it gets a bit confusing. If you see I have made an error, please let me know so I can correct what I have written.

I hope you found this page useful and be sure to check the links below for more information. They were written by experts and provide much more information. Some sites may not be up-to-date but they are always a work in progress. If you can, I would appreciate it if you would click on the “Like” below and leave a comment. It helps us bloggers stay motivated. You can also send an email to me at thebelmontrooster@yahoo.com. I would enjoy hearing from you especially if you notice something is a bit whacky.

The sources below use either the scientific name Ampelamus laevis or Cynanchum leave. There is an * in front of the latter. Some may even use the name Ampelamus albidus (**). The International Plant Names Index is a source of plant names, authors, and publications and does not indicate accepted names or synonyms.

FOR FURTHER READING:
PLANTS OF THE WORLD ONLINE (GENUS/SPECIES)
INTERNATIONAL PLANT NAMES INDEX
(Ampelamus/A. laevis)
(Cynanchum/C. laeve)
*TROPICOS (GENUS/SPECIES)
WORLD FLORA ONLINE (GENUS/SPECIES)
*WIKIPEDIA (Ampelamus/Cynanchum/C. laeve)
*USDA PLANTS DATABASE
*DAVE’S GARDEN
*MISSOURI PLANTS
*MSU-MIDWEST WEEDS AND WILDFLOWERS
*MISSOURI DEPARTMENT OF CONSERVATION
**UNIVERSITY OF MISSOURI-WEED ID GUIDE
*iNATURALIST
*WILDFLOWER SEARCH
ILLINOIS WILDFLOWERS
*KANSAS WILDFLOWERS AND GRASSES
*IOWA PLANTS
*MARYLAND BIODIVERSITY PROJECT
*IN DEFENSE OF PLANTS
*SEINet
SIDEWALK NATURE
**VIRGINIA TECH

NOTE: The data (figures, maps, accepted names, etc.) may not match on these websites. It depends on when and how they make updates and when their sources make updates. Some websites have hundreds and even many thousands of species to keep up with. Accepted scientific names change periodically and it can be hard to keep with as well. Some of the links may use a name that is a synonym on other sites. In my opinion, Plants of the World Online by Kew is the most reliable and up-to-date plant database and they make updates on a regular basis. I make updates “at least” once a year and when I write new pages or add new photos but I do get behind. We are all a work in progress. 🙂