Clones, names and why they matter

Two cuttings — what Cutting means, roughly the same length, roughly the same thickness. One is thirty dollars and one is ninety. The difference is that the second has a name, and the name is a claim about which exact plant it was cut from. Here is what those names mean, where they come from, and the two ways they go wrong.

A clone — what Clone means is a single original plant plus every piece ever taken off it. Cut a column in half and you have not made two plants — you have made two pieces of one. Variety — what Variety (var.) means, strain and clone all get used for that idea in this hobby, and a cultivar — what Cultivar means is the same thing when somebody set out deliberately to create it.

Why it matters more here than in roses or apples is that these cacti cannot pollinate themselves. A flower needs pollen — what Pollen means from a genetically different plant. Two cuttings of one clone are the same plant however far apart you grow them, so they will never set seed together — and even if they could, seed does not copy a clone. Every seedling is a new individual with its own look. That is why the currency of this hobby is cuttings rather than seed packets.

There is a neat test hiding in that: if you suspect two of your plants are the same clone, try to cross — what Cross means them. Fruit means they are seed-grown siblings.

The plant most beginners already own makes the point. Every PC — what PC ("predominant cultivar") means — the ordinary San Pedro sold in garden centres across North America — traces back to one seedling, so a whole continent's supply is branches of a single plant.

There is no registry and no committee. Names come from wherever the plant did.

Crosses are written mother × father, the mother being the plant that carried the fruit. OP — what OP (open pollinated) means after a name means open pollinated: the mother is known, the pollen father is not, because insects got there first. NOID — what NOID means means no ID, and it is a legitimate budget tier rather than an insult — unnamed plants sell for around a third less.

The etiquette growers state out loud is short. Only name something you grew from seed. Do not rename a clone that is already circulating. And if you think the name you received is wrong, do not pass it on — but do write down what you were told.

Grow two pieces of one clone in different places and the photographs can look like different species.

Strong sun gives longer spines, slower blockier growth, a yellower cast, and it bleaches the blue bloom off the skin — what Epidermis means. Dappled shade gives shorter spines, a slimmer greener column that swells faster after a watering, and it keeps the bloom. Same genetics both times.

Grafting — what Graft means shifts it further than most people expect. A very small monstrose — what Monstrose means piece put on strong rootstock — what Rootstock (stock) means will push pups bigger than itself; the same piece rooted pushes pups smaller than itself.

And time shifts it again. Monstrose clones swing between normal and strange growth over their lives, and plenty of them look perfectly ordinary for a year or two before they get weird. A young plant that looks plain has not necessarily lost anything.

The other direction is worse, because there is nothing to see.

So the same clone name from two sellers is not a guarantee of the same plant. It is a guarantee of the same label.

Scarcity and propagation speed, mostly. A clone that pups slowly stays expensive because supply cannot catch up with it. The long form of monstrose bridgesii — what Bridgesii means is the standard example: it carries very few areoles — what Areole means, and an areole is the only place a new branch can start, so there is almost nothing to cut.

Watch the community sale posts for a while and the pattern is hard to miss: hold size constant and the most sought-after names still ask several times what the easiest-to-find ones do, while a plant with no name at all sits below both. The name, and not only the size, is doing the work.

Treat anyone's confident figure for what a clone "is worth" with suspicion, though. Most names change hands only a handful of times in a season, so a number for one clone is usually built on very few sales, and a figure offered without saying how many sales sit behind it is a feeling rather than a fact.

The unglamorous half of that is labelling. On a plastic tag, pencil beats marker — graphite does not fade and does not wash off in the sun. On a cutting, write the name onto the part that will end up buried, where the writing survives for years.