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July is done, there is surprisingly little objective information about Espostoopsis dybowskii on the web it took me about 6 hours searching to get all the info i needed to put that together and its fairly basic stuff.

desert tropicals was a waste of time the images they show look nothing like it

ah well, done now.......anyone who can see any glaring mistakes please let me know

hob wrote: the images they show look nothing like it

That said, it is possible that those are actually correct images of the plant. I share your doubts, but because this thing is so elusive I wouldn't say for sure.

It was a good choice as often as it comes up, especially.

Good one Hob! Nice to see the lowly Rhipsalis get a little love!

Thanks Hob. I am fascinated by those translucent flower petals!

I see the new ones Hob! Great!

Thanks for the post.
Hi guys, Im a newbie. Nice to join this forum.

This statement on the Gymnocalycium mihanovichii page: "This is the plant that is seen all over the world in multi coloured forms grafted onto Hylocereus", is it really correct? All flowers I have seen on these have been pink.

luddhus, I think the statement of "multi colored forms" refers to the gamma-ray zapped bright red or yellow skinned grafts, not the flowers.

By the way, I do have one with a yellow-green flower. I think the pink flowered one is G stenopleurum, but it is one of those plants that have a maddening nonclemature as to who is a sp, ssp, var, cv, etc....

Shmuel

I think everyone should read the very first post in this topic from eduart dated August 2005!!!!


Shmuel

Shmuel wrote:luddhus, I think the statement of "multi colored forms" refers to the gamma-ray zapped bright red or yellow skinned grafts, not the flowers.

I know, but the flowers are described as "greeny brown".

luddhus wrote:This statement on the Gymnocalycium mihanovichii page: "This is the plant that is seen all over the world in multi coloured forms grafted onto Hylocereus", is it really correct? All flowers I have seen on these have been pink.

luddhus wrote:

Shmuel wrote:luddhus, I think the statement of "multi colored forms" refers to the gamma-ray zapped bright red or yellow skinned grafts, not the flowers.

I know, but the flowers are described as "greeny brown".

thanks for your input, there seems to be some confusion in this section of Gymnocalycium, http://www.cactus-art.biz describes it this way.

Gymnocalycium friedrichii and G. stenopleurum are sometimes combined with G. mihanovichii, and sometimes kept as separate species. The main distinctions of G. friedrichii and G. stenopleurum from G. mihanovichii are:

*

G. friedrichii has prevalently purplish pink, wide open flowers and well-pronounced polymorphism of spines. Besides it has tall slender ribs and roller-shaped prominent thickening around areoles.
*

G. mihanovichii has wider, lower ribs, in juvenile plants divided into separate chins, in maturity every rib have flat surface and a pleat above each areole. But the essential thing is its pale or brownish-yellow, not fully opening flower.
*

G.stenopleurum Has white, fully opening flowers.

But many intermediate forms are also known and nowadays it is suggested that all should be combined into only one variable species.

http://www.cactus-art.biz/schede/GYMNOC ... vichii.htm

cactiguide lists it this way

Taxonomy for Gymnocalycium mihanovichii, its infra species, and synonyms.
Name - Author - Publication - Year
Gymnocalycium mihanovichii
Britton & Rose
Published: Cactaceae (Britton & Rose) 05:33:00 AM 1922 [12 Oct 1922] [ IPNI ]
Gymnocalycium mihanovichii var. albiflorum
Pazout
Published: Friciana 111/17: 5 1963 [ IPNI ]
Gymnocalycium mihanovichii var. filadelfiense
Backeb.
Published: Kakteenlexikon 170 1966 [ IPNI ]
Gymnocalycium mihanovichii var. friedrichii
Werderm.
Published: Repert. Spec. Nov. Regni Veg. Sonderbeih. C Lief. 29, tab. 113 1936 [ IPNI ]
Gymnocalycium mihanovichii f. nigrum
Y.Itô
Published: Cactaceae [Itô] 409, without type 1981 [ IPNI ]
Synonym Data
Gymnocalycium stenopleurum
F.Ritter
Published: Kakteen Südamerika 1: 265 (1979) 1979 [ IPNI ]

http://www.cactiguide.com/ipni_name_dat ... e_key=2089


maybe I should do a re-write including the var friedrichii and var stenopleurum

I have an image of var friedrichii (pink flower) does anyone have an image of var stenopleurum (white flower) that i could use

Cactus of the month for December 2010 is now on the board, this completes 6 years of this feature. To celebrate this milestone i added a few extra images.

http://www.cactiguide.com/forum/viewtopic.php?t=19662

The first 3 years owe a great deal to the originator of Cactus of the Month, John Chippindale, his knowledge of the plants and his computer skills played a big part in helping to set up Cactiguide long before i joined the forum, Cactus of the Month was his idea and he wrote the first 36 pages of this feature.

i am proud to have followed in his footsteps, albeit with a lot less knowledge but a fair bit of computer savvy, to have completed the same number of topics as John.

together we are pleased to present 72 pages of Cactus of the Month.

http://www.cactiguide.com/forum/viewforum.php?f=8

hob wrote:maybe I should do a re-write including the var friedrichii and var stenopleurum

I think it is a good idea to have them in one place.

Congradulations Hob, you have done a great job!

This is the best image I could find of this plant that produces a mostly white flower, you can use it if you dont get a better one.

This is great! LOL I guess my pink stenopleurum is really freidrichii! Live and learn.

Shmuel