Search found 64 matches

by nobby
Sun Jan 27, 2019 9:05 pm
Forum: Small Opuntias (Tephrocactus Study Group)
Topic: Pterocactus nequensis
Replies: 11
Views: 1245

Re: Pterocactus nequensis

It is the decision of those who describe the plant.
And believe me - it is not easy!
Nobby
by nobby
Sun Jan 27, 2019 9:30 am
Forum: Small Opuntias (Tephrocactus Study Group)
Topic: Pterocactus nequensis
Replies: 11
Views: 1245

Re: Pterocactus nequensis

Hi Kees,

the plant isn't new. It has been sold for many year as Pterocactus araucanus from Neuquen. As it is different from P. araucanus my wife and I described Pterocactus neuquensis in the September KuaS 2016 together with Roberto Kiesling.

Best regards
Nobby
by nobby
Thu Jan 24, 2019 12:04 pm
Forum: Small Opuntias (Tephrocactus Study Group)
Topic: Pterocactus nequensis
Replies: 11
Views: 1245

Re: Pterocactus nequensis

I prefer the spiny form of P. neuquensis.

P_neuquensis_spine.JPG

Nobby
by nobby
Tue Jan 08, 2019 11:27 am
Forum: The Cactus & Succulent Plant Forum
Topic: Eriosyce?
Replies: 13
Views: 861

Re: Eriosyce?

It is a question of dimensions too.
This is Eriosyce aurata or E. cer..., iho... (choose the name you like).
Nobby
by nobby
Mon Sep 10, 2018 10:13 pm
Forum: Small Opuntias (Tephrocactus Study Group)
Topic: Maihueniopsis in Chile - ELK presentation
Replies: 3
Views: 1698

Maihueniopsis in Chile - ELK presentation

For all who are interested in this presentation:
you can download a pdf-file under:

http://maihueniopsis.sarnes.net submenu "Aktuelles"

Cheers Nobby
by nobby
Thu Aug 09, 2018 10:14 pm
Forum: The Cactus & Succulent Plant Forum
Topic: CITES and cactus seeds: question Solved
Replies: 34
Views: 4618

Re: CITES and cactus seeds: question Solved

As a European I won't give any comment on the British decision BREXIT. As a cactus entusiast and active member of Tephrocactus study group I think it is neccessary to give some comments about CITES and the future. CITES is an international regulation that GB joined in 1980 - before the special EU re...
by nobby
Tue Aug 07, 2018 10:25 pm
Forum: Small Opuntias (Tephrocactus Study Group)
Topic: Too hot for my pterocactus
Replies: 8
Views: 2998

Re: Too hot for my pterocactus

Hi Chris, this is a bad summer for Pterocacti. If it is hot and you water the plants they will be boiled. The best is to give them as much fresh air as possible. In habitat the plants often loose the offsets in summer - but the root is always in the cool soil. The labels show that the soil and the p...
by nobby
Fri Jul 27, 2018 10:48 am
Forum: The Cactus & Succulent Plant Forum
Topic: Pterocactus flower bud (???)
Replies: 9
Views: 1252

Re: Pterocactus flower bud (???)

Hi Chris,
as P. kuntzei is a synonym of P. tuberosus it is a flower of P. tuberosus.
Nobby
by nobby
Thu May 17, 2018 10:35 am
Forum: The Cactus & Succulent Plant Forum
Topic: Pyyrhocactus umadeave seedlings
Replies: 18
Views: 1973

Re: Pyyrhocactus umadeave seedlings

Yes, hydrogen peroxid is a good choice to kill many fungi on the seeds. Using acid it is important to have the correct concentration (96%) - the often used lower concentration for car batteries does not help - and the chosen period must be effective (too short - it will not work, too long - the embr...
by nobby
Tue May 15, 2018 7:57 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Pyyrhocactus umadeave seedlings
Replies: 18
Views: 1973

Re: Pyyrhocactus umadeave seedlings

It is better to wash the seeds before sowing.
I can't believe that the seedlings love the acid.
Greetings Nobby