Seedling ID

[MrMatt]

Three years ago I planted a number of what I purchased as Echinofossulocactus (Stenocactus) crispatus. I am questioning the id. Could anyone offer insight to either confirm or refute the species?

Thanks

[anttisepp]

Right name imho.

[MrXeric]

The genus is right, at least! Since I've never sown this genus, I was very surprised to find out they are tuberculate in youth, growing into their characteristic wavy ribs later on.

[greenknight]

It should become more clear soon, they look like they're on the verge of shifting from their juvenile tuberculate phase to the mature ribbed state.

[jerrytheplater]

The genus is right, at least! Since I've never sown this genus, I was very surprised to find out they are tuberculate in youth, growing into their characteristic wavy ribs later on.

That is news to me too.

[Kipody]

It should become more clear soon, they look like they're on the verge of shifting from their juvenile tuberculate phase to the mature ribbed state.

Thats also my experiance. They have these funny looking long spines at first. When they start to develop their ribs the spines turn into the more "sharky" type.

[A_G_R]

Three years ago I planted a number of what I purchased as Echinofossulocactus (Stenocactus) crispatus. I am questioning the id. Could anyone offer insight to either confirm or refute the species?

Thanks

Just out of curiosity, what makes you doubt their id? I have no experience growing Stenocactus babies, but I know in the case of Turbinicarpus they can be very similar when young.

[MrMatt]

Just out of curiosity, what makes you doubt their id? I have no experience growing Stenocactus babies, but I know in the case of Turbinicarpus they can be very similar when young.

This was my first time planting this species and I thought they were getting quite large without starting to display any signs of ribbing. Of course, the following week, evidence of ribbing was starting to form on the largest specimen.

[nachtkrabb]

Isn't it interesting how different cacti look at different ages? We should add pictures of babies, juveniles as well as oldsters to our picture database.
Pictures sent to Daiv via mail (not in a thread) might be added by him.
N.

[Tom in Tucson]

Isn't it interesting how different cacti look at different ages? We should add pictures of babies, juveniles as well as oldsters to our picture database.
Pictures sent to Daiv via mail (not in a thread) might be added by him.
N.

It's a great idea! As an example of just that very approach, check out the book: Turbinicarpus - Rapicactus by Donati and Zanavello. Not only do they include pictures of seedlings of all the species, but use them effectively to make their case for their classification.

[nachtkrabb]

It's a great idea! As an example of just that very approach, check out the book: Turbinicarpus - Rapicactus by Donati and Zanavello. Not only do they include pictures of seedlings of all the species, but use them effectively to make their case for their classification.

Now that sounds like an interesting approach & book. Thank you.
N.