# Skaneateles Conservation Area/Invasive species/Ampelopsis glandulosa
## Ampelopsis glandulosa var. brevipedunculata (porcelain berry)

Some sources, including iMapInvasives, treat porcelainberry or Amur peppervine as a separate species (Ampelopsis brevipedunculata), while others (e.g. the New York Flora Atlas) treat Ampelopsis brevipedunculata as a synonym of Ampelopsis glandulosa. For the purposes of this document, we'll generally refer to this plant as Ampelopsis glandulosa (or porcelainberry) except where references using Ampelopsis brevipedunculata are being quoted directly.

### Identification

Porcelainberry (Ampelopsis glandulosa) is a deciduous, woody, perennial vine in the grape family, Vitaceae, and without its colorful fruit it looks quite similar to grape vines. Non-fruiting vines can be differentiated by the pith, which is white in porcelain berry stems but brown in grapevines. These vines also differ by the presence of lenticels on porcelainberry bark and the shaggy straight-peeling bark of grape vines.
The flowers and fruit of porcelainberry generally grow upright as opposed to grapes, which hang down. Porcelainberry fruit is also harder than grapes and is distinctive in the range of colors from white, aqua, pink, blue, purple, etc.
Southeastern-native Ampelopsis peppervines are occasionally planted as "native" and also have similar appearances.
* ↑ Sarah Archer (2015). "Porcelainberry or Grape? Identifying a Common Invader." Environment, Arlington County, VA.
* ↑ Porcelain Berry Identification, Ecology, and Control in the UW-Madison Lakeshore Nature Preserve.
* ↑ National Park Service & U.S. Fish and Wildlife Service (2010). "Vines: Porcelainberry" in Plant Invaders of Mid-Atlantic Natural Areas, 4th ed.

### Nearest infestations

Ampelopsis glandulosa var. brevipedunculata (porcelain berry or Amur peppervine) as been confirmed in iMapInvasives in Cayuga County near the south end of Skaneateles Lake and at Filmore Glen State Park. A larger infestation is present in Ithaca at Buttermilk Falls.
* ↑ iMapInvasives New York map for Ampelopsis brevipedunculata.

## Invasiveness ranking for Ampelopsis glandulosa (porcelainberry)

In 2010, Ampelopsis brevipedunculata (Maxim.) Trautv. (Porcelain berry) was ranked as highly invasive with a score of 62/87 = 71.26%
Regulated by New York State law.

### 1. Ecological impact (17/30)

1.1. Impact on Natural Ecosystem Processes and System-Wide Parameters: Influences ecosystem processes to a minor degree (3/10)
* Large accumulation of biomass affect organic matter, nutrient content of soil and fire regime.
* Large stands impact light availability.
* Can dominate the vegetation by forming a uniform blanket over shrubs, trees, and the ground, especially on forest edges.
1.2. Impact on Natural Community Structure: Significant impact in at least one layer (7/10)
* Form a sprawling mat shading out other plants below it, creating a new vine layer.
* May not completely cover the canopy or eradicate layers below.
1.3. Impact on Natural Community Composition:
1.4. Impact on other species or species groups:

### 2. Biological characteristics and dispersal ability (/)

2.1. Mode and rate of reproduction
2.2 Innate potential for long-distance dispersal:
2.3. Potential to be spread by human activities:
2.4. Characteristics that increase competitive advantage:
2.5. Growth vigor:
2.6. Germination/Regeneration:
2.7. Other species in the genus invasive in New York or elsewhere:

### 3. Ecological amplitude and distribution (/)

3.1. Density of stands in natural areas in the northeastern USA and eastern Canada:
3.2. Number of habitats the species may invade:
3.3. Role of disturbance in establishment:
3.4. Climate in native range:
3.5. Current introduced distribution in the northeastern USA and eastern Canada:
3.6. Current introduced distribution of the species in natural areas in the 8 NY PRISMs:

### 4. Difficulty of control (/)

4.1. Seed banks:
4.2. Vegetative regeneration:
4.3. Level of effort required:

### References for invasiveness ranking

* ↑ M.J. Jordan, G. Moore & T.W. Weldy (2008). Invasiveness ranking system for non-native plants of New York. Unpublished. The Nature Conservancy, Cold Spring Harbor, NY; Brooklyn Botanic Garden, Brooklyn, NY; The Nature Conservancy, Albany, NY. Ampelopsis brevipedunculata assessed by Jinshuang Ma, Gerry Moore, April 9, 2008; edited Feb. 9, 2010.
* ↑ New York Codes, Rules and Regulations, Title 6 Section 575.4 - Regulated invasive species
* 1 2 Melissa A. Waggy (2009). Ampelopsis brevipedunculata. In: Fire Effects Information System. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory

## Observations of ssss (ccc) at the SCA

The following photographs and corresponding iNaturalist observations of tttt were made at or very near the Skaneateles Conservation Area. Click on images to enlarge and read details on Wikimedia Commons or on the "iNat obs" links to view the corresponding observations at iNaturalist.
* tttt, Skaneateles Conservation Area, dd mmm yyyy. iNat obs
* File:Tttttt SCA-yymmdd nn.jpg