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lewis
avid contributor & moderator
Number of posts: 863
Location: Melbourne
Registration date: 2008-05-07
 | | Subject: myrio multicostatums... Sat Nov 01, 2008 4:55 pm | |
| astros seem to be popular here... heres a few more. 6 ribs nudum  7 ribs semi-nudum  8 ribs normal  and 4,5,6,7,8     |
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Hellonasty
Admin
Number of posts: 1250
Location: NSW
Registration date: 2008-04-04
| | Subject: Re: myrio multicostatums... Sat Nov 01, 2008 5:20 pm | |
| Really nice lewis. I like them. All of them |
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lewis
avid contributor & moderator
Number of posts: 863
Location: Melbourne
Registration date: 2008-05-07
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CactusPolecat
Calm and Collected
Number of posts: 245
Location: Tassie
Registration date: 2008-10-06
| | Subject: Re: myrio multicostatums... Sat Nov 01, 2008 5:25 pm | |
| Very nice Lewis... s'pose you're trying for nine now?
CP |
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lewis
avid contributor & moderator
Number of posts: 863
Location: Melbourne
Registration date: 2008-05-07
| | Subject: Re: myrio multicostatums... Sat Nov 01, 2008 5:29 pm | |
| yeah that would be good. though 3 or 2 would be better.
old myriostigmas have a tendency to randomly develop heaps more ribs in old age.. i once saw an old 8 ribbed specimen where all the ribs had split again so it had 16 ribs! |
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Hellonasty
Admin
Number of posts: 1250
Location: NSW
Registration date: 2008-04-04
| | Subject: Re: myrio multicostatums... Sat Nov 01, 2008 5:39 pm | |
| Only thing is lewis it is almost imposible to say if/if not they are Hybrids. Would you agree ? |
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trigonus
Admin & Cactus Fiend
Number of posts: 881
Location: coastal NSW 1°C - 40°C
Registration date: 2008-01-23
| | Subject: Re: myrio multicostatums... Sat Nov 01, 2008 6:36 pm | |
| Nice lewis. I particularly like the double header. I reckon HN is right and the ribs are definitely remiscent of A. capricorne. Very difficult to prove/disprove this though I guess.
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lewis
avid contributor & moderator
Number of posts: 863
Location: Melbourne
Registration date: 2008-05-07
| | Subject: Re: myrio multicostatums... Sun Nov 02, 2008 10:22 am | |
| | Hellonasty wrote: | | Only thing is lewis it is almost imposible to say if/if not they are Hybrids. Would you agree ? |
myriostigmas with an unsually high number of ribs do exist in the wild, just like quadricostatums do. However they are very rare in most localities (excluding of course ancient specimens that have gone crazy with dividing ribs and which were originally normal), and grow alongside normal 5 ribbed plants so they do not get variety status or any other recognition. 6 and 7 ribs are possible (so my two could be considered freak seedlings), but 8 is a bit of a far cry. it is possible, anything is, but would be a pretty rare phenomenon.
Of course, the situation is exacerbated in cultivation because myrios have been indiscriminately crossed with ornatums (and then backcrossed with both) for many years. If is it is a hybrid, then it would be with ornatum (capricorne being more difficult to cross with myriostigma if you follow the basic rules of astro hybridisation.. i.e. the plants with flowers with red centres (asterias, capricorne, coahuilense) interbreed much more readily with each other as do those with completely yellow flowers (i.e. myriostigma and ornatum). Crosses between the two groups are somewhat more difficult. OF COURSE i think every Astrophytum has been crossed successfully at some point, and this is very general and regards ease of hybridisation. The 8 ribbed plant in question does flower like a normal myriostigma.
therefore multicostatum is considered by some to be a cultivar.
info about multicostatum:
http://www.cactus-art.biz/schede/ASTROPHYTUM/Astrophytum_myriostigma/Astrophytum_myriostigma_multicostatum/Astrophytum_myriostigma_multicostatum.htm
from Cactus-Art:''Description: Astrophytum myriostigma multicostatum (With multiple ribs) deviates from the well-known standard A. myriostigma for having six or more ribs instead of five depending on clones. Plants with more than 5 ribs has been found in habitat (even if with a very low frequency), but most of the "multicostatum" found in cultivation are not 100% true A. myriostigma but hybrid that have inherited the adjunctive ribs from one of the ancestor (Presumably A. ornatum). The flower are also very beautiful.''
in any case it is very difficult to prove either way.. other than extra ribs the plants represent in every way what a myriostigma should. |
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MichaelCactus
Calm and Collected
Number of posts: 293
Location: Bendigo
Registration date: 2008-06-24
| | Subject: Re: myrio multicostatums... Sun Nov 02, 2008 12:04 pm | |
| Grr Lewis, every time i think im catching up, you bring out more |
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lewis
avid contributor & moderator
Number of posts: 863
Location: Melbourne
Registration date: 2008-05-07
| | Subject: Re: myrio multicostatums... Thu Nov 13, 2008 12:21 pm | |
| multicostatum in the wild:
http://cgi.ebay.com.au/10-Astrophytum-myriostigma-form-TULA-SEMI-SEEDS-CACTUS_W0QQitemZ400002728388QQihZ027QQcategoryZ20521QQrdZ1QQcmdZViewItemQQ_trksidZp1713.m153.l1262
edit: ok so 8 ribbed plants are found in the wild. |
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Hanazono
Astromaniac
Number of posts: 387
Location: SA
Registration date: 2008-09-14
| | Subject: Re: myrio multicostatums... Thu Nov 13, 2008 6:40 pm | |
| Numbers of rib of some myriostigma are not stable. I bought seeds of 3 ribs myriostigma and disappointed many times. Althogh seedlings are 3 ribs, changed to more than 3 in mature. The followings a bit different story but: You will get flower-bud/pup likes things sometime when you grafted myriostigma. (myriostigma cv Onzuka 2003)  Although inside is porous it is possible to graft.  It was grown multi-ribed plant  I was suppliesed but this plant reduced ribs to 5 as normal. |
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lewis
avid contributor & moderator
Number of posts: 863
Location: Melbourne
Registration date: 2008-05-07
| | Subject: Re: myrio multicostatums... Thu Nov 13, 2008 7:22 pm | |
| ^  wow, hana thats amazing, really. thats one of the weirdest things i've ever seen. |
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KanJe
watchman
Number of posts: 393
Location: Melbourne
Registration date: 2008-06-24
| | Subject: Re: myrio multicostatums... Sat Nov 15, 2008 10:13 am | |
| They are really nice Lewis, particuarly the double headed.
Thats awesome Hanazono, I've honestly never seen that before. I must give you credit for your skills with astros... Good work. |
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Hellonasty
Admin
Number of posts: 1250
Location: NSW
Registration date: 2008-04-04
| | Subject: Re: myrio multicostatums... Sat Nov 15, 2008 10:51 am | |
| Pitty it reverted back to normal growth Hana !! |
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