Echinopsis ‘Rainbow Bursts’ (Syn. xEchinobivia ‘Rainbow Bursts’)

Echinopsis ‘Rainbow Burts’ (Syn. x Echinobivia ‘Rainbow Bursts’) on 7-19-16, #274-48.

NO LONGER AN x Echinobivia

Echinopsis ‘Rainbow Bursts’



Echinobivia ‘Rainbow Bursts’

I bought this Echinobivia ‘Rainbow Bursts’ from Wal-Mart on 2-1-16. The label said: ”Rainbow Bursts are so named for their spectacular display of colorful flowers during the spring and summer. These hybrids are cross (combined genetics) of Echinopsis species and Lobivia species, hence the name Echinobivia. Protect from frost.” The plant was growing in a 2 1/2” (4 oz.) pot. It measured approximately 2 1/4” tall x 3 1/2” wide.

Information online says Echinobivia ‘Rainbow Bursts’ can be white, yellow, gold, orange, pink, red, purple, and sometimes bicolor.


Echinopsis sp. (Syn. x Echinobivia ‘Rainbow Bursts’) on 5-31-17, #339-30.

So, as always, I had to do some research. As usual, at that time, I went to The Plant List to get to Tropicos. No record of Echinobivia which wasn’t surprising. So, I checked out the genus of the parents since no species names were given. Oh yeah, The Plant List is no longer maintained but is still a good source of information.

Tropicos says Echinopsis Zucc. is a correct and accepted scientific name. It was named and described by Joseph Gerhard Zuccarini in Abhandlungen der Mathematisch (short version) in 1837.

Plants of the World Online by Kew currently lists 69 accepted species of Echinopsis (which does not include infraspecific names of some of the species). According to the 2013 version of The Plant List, there were 131 accepted species of Echinopsis (plus another 25 accepted infraspecific names), 627 synonyms (of which 245 were infraspecific names) and a total of 159 unresolved species. Remember, that was in 2013 and The Plant List is no longer maintained.

The genus Lobivia Britton & Rose WAS also a correct and accepted scientific name for this genus of cacti. It was named and described by Nathaniel Lord Britton and Joseph Nelson Rose in The Cactaceae in 1922.


Echinopsis ‘Rainbow Burts’ (Syn. x Echinobivia ‘Rainbow Bursts’) on 9-5-17, #371-10.

Of course, I always cross reference all names with Llifle (Encyclopedia of Life) which was probably a very good idea at the time… Llifle says that the Lobivia genus is a synonym of Echinopsis… Just going down the list of Echinopsis species on Llifle is exhaustive! So many names are now synonyms! One great thing I like about Llifle is that they also list a few cultivar names but there was no listing for ‘Rainbow Bursts’. I thought perhaps since the Lobivia genus was no longer valid maybe the cultivar name would be transferred. But there is something strange… I clicked on the Lobivia genus anyway and you will find there are two accepted infraspecific names BUT one of those is a synonym of the other. So, I guess that makes 1. I copied and pasted that name on Plants of the World Online and they say it is a synonym of an Echinopsis species. I guess that makes zero…


Echinopsis ‘Rainbow Bursts’ (Syn. x Echinobivia ‘Rainbow Bursts’) on 10-11-17, #382-26.

A while back I was told about a new site by Kew (Royal Botanic Garden) called Plants of the World Online. That was great because I now have a current replacement for The Plant List even though they are still uploading data. Naturally, I copied and pasted the name Echinobivia to see what they had to say. They say xEchinobivia is a synonym of Echinopsis and agreed with Llifle that so is the Lobivia genus.

While most of the Lobivia species and infraspecific names have been moved to the Echinopsis genus, a few were transferred to the Rebutia and Acanthocalycium generaCurrently, Plants of the World Online lists 69 accepted species of Echinopsis, 30 species of Rebutia, and 5 species of Acanthocalycium. The Llifle website is really good, but you can’t make heads or tails out of how many accepted species there actually are. For the Echinopsis genus, it says (at the top of the page, “Total names currently in database: 628 of which 603 accepted Echinopsis names and 25 non-accepted Echinopsis names now referring to other genera… The whole 603 names are a mixture of accepted species, infraspecific names, cultivars and all the synonyms all counted in their “accepted” number. I think they need to work on that.

The Wikipedia article on Echinopsis says there are 128 species. I will be glad when they get all these names figured out so we can get a closer accurate count.

SO, I suppose Echinobivia ‘Rainbow Bursts’ is just another cultivar of Echinopsis and not an intergeneric cross after all.

Another great thing about the Llifle website is the AWESOME photos of many of the species. The flowers of this Echinopsis will be AWESOME for sure! if it ever decides to flower.


Echinopsis ‘Rainbow Bursts’ (Syn. x Echinobivia ‘Rainbow Bursts’) at 2 3/8″ tall x 4″ wide on 10-17-17, #384-5.

I moved the plants inside for the winter on October 17 (2017). The first stop was the basement where they were all photographed and measured. This plant was 2 3/8″ tall x 4″ wide. It didn’t grow much because it was 2 1/4″ tall x 3 1/2″ wide when I brought it home in July 2016.

All those kids can be removed and rooted or they can be left attached. I am opting to leave them attached because I certainly don’t need that many Echinopsis plants and how long would it take them to grow?  I guess that calls for an experiment.


Top view of the Echinopsis ‘Rainbow Bursts’ (Syn. x Echinobivia ‘Rainbow Bursts’) on 10-17-17, #384-6.

How would you like to sit on that? The top view of most cactus is just as interesting as the side view.



Echinopsis sp. (Syn. xEchinobivia cv. ‘Rainbow Bursts’) on 1-1-18, #401-4.

I put the Echinopsis ‘Rainbow Bursts’ on a table with most of the cactus and succulents in my bedroom for the winter. They received plenty of light from a south facing window.


Echinopsis cv. ‘Rainbow Bursts’ on 5-17-18, #443-31.

The Echinopsis ‘Rainbow Bursts’ was happy to get outside for the summer again.


Echinopsis ‘Rainbow Bursts’ in a new pot, 5-25-18, #448-8.

I decided to put this plant and all its kids in a larger pot. It was beginning to bulge. Even though you are supposed to only increase the pot size by 1/2 to 1″ in diameter, I gave this cactus a bigger pot in case the babies fall off and need room to root.


Echinopsis ‘Rainbow Bursts’ on 7-29-18, #487-39.

I moved the potted plants to the front and back porches on July 4 (2018) because of a Japanese Beetle invasion. The plant tables were next to and behind a shed under a Chinese Elm tree which the beetles love. The beetles were beginning to sample a few of the other plants so I moved them. I moved most of the cactus to the back porch including the Echinopsis ‘Rainbow Bursts’. You can see the dead leaves from the elm tree in the pot.


Echinopsis ‘Rainbow Bursts’ on 8-26-18, #499-19.

Doing well in full sun on the back porch on August 26.


Echinopsis ‘Rainbow Bursts’ on 10-10-18, #519-30.

I measured the cactus on October 10 when I was getting ready to move the plants inside for the winter. The cluster of Echinopsis ‘Rainbow Bursts’ now measures 3″ tall x 5″ wide. It didn’t grow that much from the time I brought it home in July 2016 until I measured it last October. This time, however, it grew 3/4″ in taller and 1 3/4″ wider.


Echinopsis ‘Rainbow Bursts’ on 11-29-18, #534-10.

We had a couple of nice spring-like days the last part of November, so I decided to take the cactus outside for a photo shoot for a new post. The post was for comparing the difference between the cactus I have in my collection.


Echinopsis ‘Rainbow Bursts’ close-up of the original plant on 12-1-18, #535-8.

Here you see the parent Echinopsis ‘Rainbow Bursts’ has very small spines and a little wool on the areoles. The hair you see in the photo is cat fur…


Close-up of the Echinopsis ‘Rainbow Bursts’ offsets on 12-1-18, #535-9.

The offsets have more and longer spines in relation to their size than the original plant. The offsets grow between the areoles.

There is quite a bit of information online about this genus and many species. It is quite a celebrated due to their ease of keeping and especially their beautiful flowers. I will be glad when it blooms!

I will continue adding more photos and information as time goes by. If you have any comments, questions or suggestions, I would like to hear from you. If you can’t think of what to say, please click on the “like” below if you have visited as it helps us bloggers stay motivated. You can click on the links below for further reading about this AWESOME genus of cactus.


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