Search found 507 matches

by Peter A
Mon Nov 02, 2015 9:07 pm
Forum: The Cactus & Succulent Plant Forum
Topic: September cactus world editorial
Replies: 48
Views: 12040

Re: September cactus world editorial

I did not say "there are no absolute truths", which is obviously self-contradictory. What I said was that it is possible to disprove something, but not to prove it. I cannot dis-prove that 1 + 1 = 2, but that is not proof that it is correct: merely a strong indication. An axiom as you expl...
by Peter A
Mon Nov 02, 2015 8:23 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Lophophora williamsii: self-fertile?
Replies: 21
Views: 10090

Re: Lophophora williamsii: self-fertile?

This is a picture of a seedling from my large pink-flowered plant (depicted earlier in the thread), which is now c.86 years old and was probably collected from habitat. I have never had more than the one Lophophora (and its seedlings). The flower is not perfectly white, but very close - which sugges...
by Peter A
Sun Nov 01, 2015 8:43 pm
Forum: The Cactus & Succulent Plant Forum
Topic: September cactus world editorial
Replies: 48
Views: 12040

Re: September cactus world editorial

Peter A wrote: It has always been my understanding that it is possible to dis-prove something, but not to prove it. I have never yet seen a mathematical proof that 1 + 1 = 2. To which I added: Mathematics is the application of logic to hypotheses. The 'proofs' that result depend upon the vaidity of...
by Peter A
Sun Nov 01, 2015 4:34 pm
Forum: The Cactus & Succulent Plant Forum
Topic: September cactus world editorial
Replies: 48
Views: 12040

Re: September cactus world editorial

It has always been my understanding that it is possible to dis-prove something, but not to prove it. I have never yet seen a mathematical proof that 1 + 1 = 2. Mathematics is the application of logic to hypotheses. The 'proofs' that result depend upon the vaidity of the hypotheses. We have just disc...
by Peter A
Tue Oct 20, 2015 2:41 pm
Forum: The Cactus & Succulent Plant Forum
Topic: These two are going to have problems...
Replies: 3
Views: 1055

These two are going to have problems...

These two are going to have problems fighting their way through the spines! ASI1Matucana haynei 1 20.10.15 2.jpg ASI2Matucana haynei 20.10.15 4.jpg ASI3Matucana haynei 20.10.15 5.jpg Matucana haynei flowering for the first time - if it makes it! Last year it had one bud, but it aborted. This year it...
by Peter A
Mon Oct 12, 2015 2:35 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Cactus flowers
Replies: 34
Views: 9162

Re: Cactus flowers

But the sun came out later...
ASIAriocarpus agavoides  12.10.15 6.jpg
by Peter A
Mon Oct 12, 2015 12:15 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Cactus flowers
Replies: 34
Views: 9162

Re: Cactus flowers

A final one: five days later. They flower a long time, but to-day they are reluctant to open - there's no sun.
ASIAriocarpus avavoides 12.10.15 1.jpg
by Peter A
Fri Oct 09, 2015 10:57 am
Forum: The Cactus & Succulent Plant Forum
Topic: Cactus flowers
Replies: 34
Views: 9162

Re: Cactus flowers

It took longer than expected, probably because of the bad weather, but at last...the first flower, at least...
ASIAriocarpus agavoides  7.10.15 6.jpg
ASIAriocarpus agavoides b 7.10.2015 1.jpg
Quite a large flower for a baby plant!
by Peter A
Sat Sep 26, 2015 12:39 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Cactus flowers
Replies: 34
Views: 9162

Re: Cactus flowers

Nice to see what it should look like! You've beaten my one by a couple of days...
ASIAriocarpus agavoides 26.9.15 3.jpg
A seedling obtained from Christer about eighteen months ago as part of a swap. According to the label it will be five years old next month.
by Peter A
Mon Sep 07, 2015 1:17 am
Forum: The Cactus & Succulent Plant Forum
Topic: I seems determined to prove that it IS an Echinopsis...
Replies: 6
Views: 2139

Re: It seems determined to prove that it IS an Echinopsis...

Hi Peter Your plant seem to be a Trichocereus ( Echinopsis ) candicans (tu) Trichocereus, yes, but lamprochlorus. The plant in cultivation as lamprochlorus is probably a slender form of candicans. There's little evidence of it in the wild. As far as I can discover, going back to the 1920s, lamproch...