[MAIPC] Viburnum x rhytidophylloides

[Don Callihan]

Realizing that Hydrangea quercifolia W. Bartram native range is the southeastern US (Tennessee and North Carolina and south), I'm curious why it is considered "invasive" in Arlington County, Virginia, Northern movement of native ranges is observed and predicted for many nonnative plants. Shouldn't we consider that such range extension is a natural consequence of warming. To label a North American native plant as invasive, although nonnative to NoVA historically, is lumping it in with other nonnative Hydrangeas appropriate? Is there any evidence that H. quercifolia inflorescence is a decent food source for pollinators?
https://plants.usda.gov/home/plantProfile?symbol=HYQU3
I realize these are naïve questions. Just interested in hearing from the experienced botanists among us.
Thanks,
Don

Don Callihan
Cockeysville, MD 21030
410-961-8132 (cellular)
don_ihan at hotmail.com<mailto:don_ihan at hotmail.com>

From: Rod Simmons <Rod.Simmons at alexandriava.gov>
Sent: Friday, April 22, 2022 12:28 PM
To: MAIPC at lists.maipc.org
Cc: Jil Swearingen <jilswearingen at gmail.com>; Judy Fulton <jfulton5 at gmail.com>; Wright, Robert <RWright at wetlands.com>; Chuck Bargeron <cbargero at uga.edu>; Lee Patrick <lee at ipc.us.com>; Steven Manning <steve at ipc.us.com>; Alex Taylor <alex at ipc.us.com>; Kayla Lynch <kayla at ipc.us.com>
Subject: [MAIPC] Viburnum x rhytidophylloides

Hi John,

I'm finding the way overplanted Viburnum x rhytidophylloides to be more invasive than the much longer leaved lookalike V. rhytidophyllym.

I've now collected Viburnum x rhytidophylloides from D.C., Maryland (Montgomery County), and City of Alexandria and Arlington County in northern Virginia.

Both taxa, however, are still very rare, naturalized escapes - at least in the D.C. region at this point.  (I've got only one collection of V. rhytidophyllym from the D.C. region - in the City of Alexandria.)

Still, I list V. rhytidophyllym in the Non-Native Invasive Plants of the City of Alexandria, Virginia list and will definitely add Viburnum x rhytidophylloides to the next revision, along with Hydrangea quercifolia, which I've documented as invasive in Arlington County.

I also plan on including Viburnum x rhytidophylloides in my next Noteworthy Collections paper.

All the best,

Rod

From: MAIPC <maipc-bounces at lists.maipc.org<mailto:maipc-bounces at lists.maipc.org>> On Behalf Of John Nystedt
Sent: Thursday, April 21, 2022 11:09 AM
To: MAIPC at lists.maipc.org<mailto:MAIPC at lists.maipc.org>
Subject: [MAIPC] Viburnum rhytidophylloides

Is Viburnum rhytidophylloides, commonly sold as the cultivar Allegheny viburnum, on invasive lists?

Anecdotal?
Lookalike to V rhytidophyllym, leatherleaf viburnum, which IS an invasive.

Thanks in advance.

John Nystedt
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