When the Daughter Does Not Resemble the Mother
A Teaching Scroll
There is a question almost every grower eventually hears when offering a promising cormlet: “Can I see the mother plant?”
Absolutely. It is a perfectly reasonable question. The mother can tell us quite a lot. She can give us clues about lineage, form, growth habit and the expression that has already appeared in that plant.
But sometimes another question is hiding behind the first one: “If I see the mother, will I know what the daughter is going to become?”
Ah. Now the plant has made things complicated. Because the answer isn't necessarily yes.
The photograph accompanying this Scroll is one example that made us stop and look twice.
At the top is an Alocasia Heart Balloon mother. She was acquired by Variegated Greens as a reportedly reverted plant. According to the source from whom we acquired her, she had previously shown pink variegation before returning to predominantly green growth. We didn't witness that earlier pink expression ourselves, so we cannot independently confirm it.
What we can show you is the mother as she came to us. Green. Quite convincingly green, actually.
And underneath her in the photograph is one of her cormlet-grown daughters. Well... apparently somebody forgot to tell the daughter that Mom had gone green.
Her emerging leaf began showing pink, green and darker pigmentation quite unlike the mother visible above her.
And suddenly an old question became interesting again.
What exactly is the daughter expressing?
The tempting answer would be: “The variegation was hiding in the corm.” It sounds wonderfully tidy. Unfortunately, plants have an irritating habit of refusing to organize themselves around our tidy explanations.
Variegation is not one single biological phenomenon.
Different kinds of variegation can arise through different mechanisms. Some involve genetic mutations. Some involve genetically different populations of cells occupying different tissues of the same plant — what botanists call chimeras. Other mechanisms can produce colour and pattern as well.
And chimeras themselves are not all alike. Depending upon how those different cell populations are arranged in the growing tissues, a variegated plant may be relatively stable, highly changeable, produce green growth, produce variegated growth, or give us something considerably less cooperative than the label on the pot suggested.
Vegetative propagation adds another wrinkle.
We often think of a vegetatively produced daughter as a copy of the mother. In a broad sense, that's reasonable. But with chimeral plants, the particular tissues from which new growth develops can matter. Horticultural propagation literature contains well-established examples in which vegetatively propagated offspring do not reproduce the visible variegation of the parent exactly.
So mother and daughter can share a lineage without necessarily becoming visual photocopies. Same family. Different wardrobe.
But here we need to put the brakes on. We do not know that this Heart Balloon is a chimera. We do not currently have evidence establishing the biological mechanism responsible for the pink expression in this particular horticultural plant. And we certainly cannot look at one colourful daughter and announce that we have solved it.
That would turn a fascinating observation into a conclusion the evidence hasn't earned.
So what can we say? We have a mother that was sold to us as a reverted Heart Balloon with a reported history of pink variegation. We have one of her cormlet-grown daughters now displaying pigmentation visibly different from the mother's current predominantly green appearance.
Those are observations. The mechanism behind them remains a question.
And what about the environment?
That's another tempting explanation.
Perhaps the daughter is expressing herself differently because she is growing under different conditions. Perhaps environment interacts with whatever biological mechanism is already present. Perhaps the explanation lies primarily in the distribution of different tissues within the plant. Perhaps several things are happening together. Or perhaps there's another part of the story we haven't considered yet.
At the moment, we don't know. And we're perfectly comfortable saying that.
We have no evidence that our Grove conditions created whatever underlying biological basis may be contributing to this expression. Nor do we have evidence that changing a particular light level, temperature or humidity setting will make this Heart Balloon produce pink variegation on command.
If we ever discover that dial, we'll let everybody know immediately. Until then, the grower can influence the environment. The plant still decides what actually emerges.
At Variegated Greens, we sometimes describe that relationship this way: The plant carries the script. The grower builds the stage. It's a metaphor, not a biological law.
The “script” may itself be complicated. Genetics, cell lineage, developmental processes and environment can interact in ways that aren't visible simply by looking at yesterday's leaf.
And the stage doesn't write the play.
Our job is to provide conditions in which the plant can grow well, then pay attention to what it actually does.
Should buyers still ask to see her?
Yes. Please do. The mother is useful evidence.
If a seller has photographs showing previous expression, those are useful too. Provenance matters. Growth history matters. Repeated observations matter.
What we should be careful about is turning any one of those clues into a guarantee about the next leaf — or the next generation of growth.
A heavily variegated mother is not automatically a promise of a heavily variegated daughter.
And as the Heart Balloon in this photograph rather cheekily demonstrates, a predominantly green mother doesn't necessarily mean every cormlet-grown daughter will remain visually identical to her either.
The mother gives us clues. She does not issue a warranty.
And perhaps that's the larger lesson.
Plant collectors understandably want names, categories and predictions: Albo. Aurea. Pink. Reverted. Stable. Unstable.
Those words can be useful descriptions.
But sometimes we reach for the verdict before the plant has finished speaking.
One leaf is an observation.
Another gives us another observation.
Repeated growth may begin to reveal a pattern.
And even then, we should remain willing to change our understanding when the plant — or better evidence — tells us otherwise.
That's what makes this daughter interesting to us. Not because she proves a theory. She doesn't. She's interesting because she gives us a question worth following.
Will the pink continue? Will subsequent leaves change? Will other cormlets from the same mother behave similarly? Will they remain green?
We don't know yet. Good. Now we have something to observe.
The mother tells us something about where the story began.
The daughter may give us clues about where it can go.
But neither gives us permission to skip ahead and pretend we've already read the ending.
So for now, we do what plants keep teaching us to do: Observe. Document. Question. Investigate. Revisit. And let the next leaf have its say.
A small note about “cormlet”
You may notice that throughout this Scroll we say cormlet rather than simply corm. There is a botanical reason for that distinction. A corm is a solid, swollen stem structure used for storage, while botanical references use terms such as cormel and cormlet for smaller corm-like propagules associated with a parent corm. The terminology is not perfectly uniform across every botanical glossary, but cormlet is an established botanical term for a small corm in this sense. So when we're talking about one of those little daughter structures, that's the term we use. Alocasia growers commonly call them “corms,” and everyone generally knows what is meant. We're not trying to police anybody's plant vocabulary. We're simply being more specific about the structure we're describing.
— Mandy Vasquez
Owner, Variegated Greens
Leaf by Leaf, a Living Mosaic.