Cactus species not in cultivation...

[Richard1933]

Hello, I am currently re-reading A Cactus Odyssey by Mauseth, Kiesling and Ostolaza. Whilst in Bolivia they come across Samaipaticereus corroanus which even today seems to be relatively rare in cultivation. Are there any other such species which have been discovered/cataloged and known of but have yet to reach cultivation? Or are there any species which are popular within collections but have not been re-discovered/re-collected in habitat for quite some time and thus would warrant tracking down again?

[KathyM]

The peanut cactus, Echinopsis chamaecereus, is one that is very widely grown but has never been found in habitat again I believe.

[ralphrmartin]

Yes, plenty of both kinds!

For example, as far as I am aware, there's just one clone of Aylostera (was Rebutia) albiflora in cultivation.

And there are many of Ritter's plants described in his 4 volume Kakteen in Sudamerika which don't seem to be in cultivation now, if they ever were.

[ralphrmartin]

The peanut cactus, Echinopsis chamaecereus, is one that is very widely grown but has never been found in habitat again I believe.

I have a form which was supposed to have been collected in the wild by Dieter Herzog in the Sierra Calchique - although Graham Charles poo-poos it and says he thinks it is a hybrid. The flower is pretty similar to the cultivated form, but the body is a little fatter / darker spined / longer spined.

Does anyone else here know anything about that plant?

[Richard1933]

Yes, i had considered Ritter's work to contain many such species but without a direct paper translated copy not that easy to trawl though and translate through google, but a project when i have some more time for sure. Do you know where R. Albiflora was supposedly collected from?

[Phil_SK]

I have a form which was supposed to have been collected in the wild by Dieter Herzog in the Sierra Calchique - although Graham Charles poo-poos it and says he thinks it is a hybrid. The flower is pretty similar to the cultivated form, but the body is a little fatter / darker spined / longer spined.

Does anyone else here know anything about that plant?

Have a look at Infobrief 2000-29 FE.pdf on https://cactuspro.com/biblio/en:echinopseen

[Herts Mike]

Does anybody have Arrojadoa marylanae?

[Terry S.]

It is a popularity issue. Nearly all fairly small globular cacti are in cultivation. However many of the tall cerei and particularly opuntias are not in cultivation in the UK, although they might be used for xeriscaping in warmer countries. Graham Charles when he gives talks has a cactus category BLIH - best left in habitat.

[Richard1933]

Terry - What would be a good example of BLIH?

[kohinoor]

Does anybody have Arrojadoa marylanae?

just acquire these two from my friend.
Apparently there are someone selling these seed.