No, this isn’t a review of a Grade B horror movie, although to my mind this shrub certainly could star in one if it had a mind to. It’s the same viburnum whose flowers were so attractive in May but whose evil nature revealed itself recently.
Perhaps I’d better start at the beginning. This shrub sits at the juncture of driveway, front walkway and garage. When I moved into the house in early November I made a mental note to cut it back in early spring because it had gotten much too tall and wide for the space allotted to it. This I did as soon as the snow disappeared, and reduced the shrub in size to about 5 ft high and wide. Nice and tidy, and I had a plethora of bare branches to dispose of. In fact, considering the amount of branches I removed, I was surprised that it eventually produced any flower clusters at all in May.
However, I recently noticed that the shrub had really gone to town in the new-growth department and if I didn’t want it to soon be as big as it had been last fall, I’d better get out the pruners again.
What I didn’t know was that this viburnum was armed and dangerous.
Now, I’ve grown viburnums before; my previous garden had Viburnum dentatum ‘Blue Muffin’ as well as V. dilatatum ‘Erie’ and ‘Michael Dodge’. I also had V. plicatum ‘Mariesii’ and the pink ‘Molly Schroder’ although they were ultimately despatched by Hurricane Sandy. All lovely shrubs which never displayed a hint of animosity toward me. However, this nefarious character who came with the Money Pit/Temporary Garden is another matter entirely.
The encounter began innocently enough: snipping some outer branches with my hand pruners. But in order to get to all the new tall central growths, I had to reach into the shrub itself and so a number of the multitude of leaves inevitably brushed against the sides of my face and neck, as well as the small amount of skin exposed between my (long) sleeve ends and glove cuffs.
I’d reached and cut for about two minutes before I felt anything, but suddenly it seemed as though a tiny needle was being stuck into one side of my neck. Thinking it was an insect, I instinctively brushed at the spot. It didn’t help. In less than a minute several areas of my face, neck and wrists felt as though millions of tiny red-hot knives were being stuck into them. What the….?!?!?!?!???
Stripping off my garden gloves, I dashed indoors and spent the next ten minutes at the nearest sink. After the pain subsided I returned to the scene of the crime and examined the shrub from a safe distance (i.e., with the zoom lens of my camera.) Apparantly this plant has quite a bit of weaponry at its disposal.
The new growth is entirely covered in what looks like soft indumentum-like hairs. I don’t know if these are part of the arsenal and am not inclined to experiment by swiping it against my skin. I do know that when I pruned the shrub in early April all of the branches were woody and smooth.
The leaves actually have two secret weapons: their matte and almost invisibly hairy surfaces, and their very slightly serrated edges which are also edged with the deadly hairs as seen clearly in this backlit photo.
When I examined my pruning gloves (after donning a pair of disposable latex gloves, of course) they were covered with them. A thorough going-over of gloves, shirt and pants with a lint roller eventually removed them; I didn’t want to risk putting the items into the wash, in case their nasty effects might be chemical as well as structural in origin.
In any case, this is as far as I got with reducing the Killer Viburnum in size….not as much as I’d originally planned, but better than nothing.
Believing as I do in the tenet “Know thy enemy” I decided to sleuth out what species it is. The oldest leaves are 9” (about 23cm) long and 4” (10cm) at the widest point. Cornell University’s Dept of Agriculture has a handy interactive online viburnum identification guide (don’t be put off by the leaf beetle reference) which I was able to work through and determine that it is Viburnum x rhytidophylloides.
According to the Ohio State University horticultural site ts parentage is V. rhytidophyllum x V. lantana. Height is given as 12’x12’ “although sometimes larger” which I can well believe, and having a fairly rapid growth rate. Foliage description is spot on: dark green above while much paler white-green beneath……having a rough texture with sunken veins above, with prominently large veins beneath that have a reticulate branching pattern…. leaves are opposite, narrowly ovate to oblong, lightly serrated or entire… about 3 to 4 times as long as they are wide, and often in a tattered and ragged semi-evergreen state by early Winter [this is so true; it looks absolutely horrid]…. Fruits at first green, then transitioning to red, red-orange, or red-yellow by mid-Summer, then maturing to black in late August and early September [dead on, yet again]. The full description can be found here.
There are also two cultivars of this viburnum: ‘Willowwood’ which was developed in the late 1920s and ‘Allegheny’ dating from the 1960s. Supposedly the former tends to hold onto more of its leaves in winter, but the latter tends to produce more flowers/fruit. A good pictorial comparison of both (and to the leaves of the V. rhytidophyllum parent) can be found here at the University of Kentucky site.
None of the sites mention any adverse reactions upon skin contact and so it looks as if my nasty experience is probably a result of yet another allergy. At least I now know that the “hairy” viburnums are something I need to avoid. Most sources claim that these shrubs can be cut almost to the ground if necessary, and so I can easily envision hacking pruning it back to only a couple of feet tall next time… but not until the winter has ‘disarmed’ it!
UPDATE: The ultimate fate of the Killer Viburnum is revealed here.