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Home > Horticulture > Invasive Plants > Report to Legislature > Appendix 2

Appendix 2

Non-Native Terrestrial Plant Worksheet - Maine

 

Species: Lonicera morowii Gray (Morrow's honeysuckle)

Status:  None/Invasive/Likely/ Potential

1. Is the species native to Maine?

Yes or No

Reference/Justification: Gleason and Cronquist 1991, Haynes and Vining 1998

If yes go to #2. If no stop.

2. Answer the following 4 questions:

Does it have the potential for rapid growth, dissemination and establishment in minimally managed habitats?

Yes or No

Reference/Justification: Abundant fruit production, bird dispersed, open fields to shaded forests (IPANE website, Invasive Plants - Brooklyn Botanic Garden 1996)

Does it have the potential for widespread dispersion and for dispersing over spatial gaps?

Yes or No

Reference/Justification: bird dispersed, capable of invading bogs, fens, lakeshores, sandplains and other habitat types, vegetative sprouting, ornamental (NPS website, BBG, IPANE website)

Does it have the potential for existing in high numbers or large colonies away from intensively managed artificial habitats?

Yes or No

Reference/Justification: abundant fruit production, forms a dense shrub layer (NPS website)

Does it have the potential to displace native species in minimally managed habitats?

Yes or No

Reference/Justification: may compete with native bush honeysuckles for pollinators resulting in reduced seed set for native species, alters habitats (NPS website)

If yes to all the questions above go to #3. If no to any stop.

3. Answer the following 2 questions:

Is the species widespread in a region or habitat type in Maine?

Yes or No

Reference/Justification: found in 8 counties, both inland and coastal (IPANE website)

Does it have many occurrences of numerous individuals or colonies that displace native species in minimally managed habitats in Maine?

Yes or No

Reference/Justification: see above justification

If yes to these to questions it is considered INVASIVE in Maine. If no to either of the last two questions continue to #4

4. Is the species naturalized in Maine

Yes or No

Reference/Justification:

If yes continue to #5. If no go to #6.

5. Answer the following questions:

Does the species have one occurrence in Maine that has high numbers of individuals forming dense stands in minimally managed habitats?

Yes or No

Reference/Justification:

Has the species demonstrated to be invasive in nearby states and provinces or areas with similar climates, but its status in Maine is unknown or unclear?

Yes or No

Reference/Justification:

If yes to either one of the above 2 questions the plant is LIKELY INVASIVE.  If no to both questions proceed to #6.

6. Answer the following 3 questions:

The species has no known naturalized occurrences in Maine?

Yes or No

Reference/Justification:

The species has demonstrated to be invasive in nearby states and provinces or areas with similar climates?

Yes or No

Reference/Justification:

The species is anticipated to naturalize in Maine in the future?

Yes or No

Reference/Justification:

If yes to the last 3 questions the plant is considered POTENTIALLY INVASIVE.  If any are no then stop.

Completed by Ann Gibbs 1/08