Ampelopsis brevipedunculata was NOT FOUND
Sunny day, mid afternoon, on trail entrance behind high school soccer field. We were looking for Ampelopsis brevipedunculate.
We were confused as to why there were 2 common names.
Narrow lines on the surface of stems proves that this is a similar species.
The berries were not sky blue and the young berries were green not white.
Despite that the leaves were alternating, simple, palmate, and toothed, which is indicative of the Ampelopsis brevipdunculate the above two pieces of evidence suggest that our claim that we did not find it is correct.
Dirt road
Walking trail
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Ampelopsis brevipedunculata
You're right; you did not find Ampelopsis brevipedunculata. Although the leaves of the plant you found have lobes, they're not as deep or as narrow as those of porcelainberry. You found a grape vine. We have several native species of grape. Porcelainberry is often confused with grapes, but here are some characteristics you can use to distinguish them in the future:
1-If you cut a stem, you'll see that the pith in the center of porcelainberry vines is white, while that of grapes is brown.
2-If you cut a stem at the node (the point at which leaves, tendrils and berry clusters develop), you'll notice that porcelainberry stems have continuous pith, while grape stems are hollow at the nodes.
3-If you look at the surface of older stems, you'll see that porcelainberry stems have continuous bark, while grape bark peels or shreds on older stems.
I'm not sure what you meant by two common names ... "porcelainberry" is the common name of this plant (I'm not aware of other common names). "Ampelopsis brevipedunculata" is the scientific name (genus and species). Let me know if that answers your questions, or if I'm misinterpreting this.
By the way ... very nice photo of your quadrat poles in place!