Search found 7364 matches

by DaveW
Sun Mar 17, 2024 10:53 am
Forum: Cacti Identification
Topic: Copiapoa identification III
Replies: 2
Views: 90

Re: Copiapoa identification III

C. haseltoniana usually has yellowish/orange wool in the crown or areoles. As said previously it is hard to identify Copiapoa's whilst small.

http://www.llifle.com/Encyclopedia/CACT ... seltoniana

Maybe somebody who grows many from seed can help?
by DaveW
Sun Mar 17, 2024 10:45 am
Forum: Cacti Identification
Topic: Copiapoa identification
Replies: 1
Views: 71

Re: Copiapoa identification

The problem is Copiapoa's as young plants often look quite different to an older plant. http://www.llifle.com/Encyclopedia/CACTI/Family/Cactaceae/1380/Copiapoa_cinerea#:~:text=Description%3A%20Copiapoa%20cinerea%20is%20one%20of%20the%20most,solitary%2C%20or%20slowly%20offsetting%2C%20globular%20to%2...
by DaveW
Sun Mar 10, 2024 11:54 am
Forum: General
Topic: Pictures of cacti next to rocks in habitat
Replies: 8
Views: 375

Re: Pictures of cacti next to rocks in habitat

Some tuberous rooted cacti that grow among or under rocks or even shrubs have ev0lved an extreme form of etiolation to get their flowering heads above rocks etc for pollination. This modification is retained even if grown in pots when no rocks are present. https://bcss.org.uk/turbinicarpus-subterran...
by DaveW
Sun Mar 03, 2024 5:37 pm
Forum: General
Topic: Pictures of cacti next to rocks in habitat
Replies: 8
Views: 375

Re: Pictures of cacti next to rocks in habitat

I presume you are aware of these articles? https://link.springer.com/article/10.1007/s00442-007-0698-y https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0081513 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2701848/ https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745...
by DaveW
Sat Mar 02, 2024 11:41 am
Forum: General
Topic: Pictures of cacti next to rocks in habitat
Replies: 8
Views: 375

Re: Pictures of cacti next to rocks in habitat

Just give me the usual picture credit and you can use what you want.

DaveW (Dave Whiteley)
by DaveW
Fri Mar 01, 2024 10:22 am
Forum: Books and References
Topic: Cactus & Succulent Review
Replies: 0
Views: 554

Cactus & Succulent Review

Latest edition of free to download Cactus & Succulent Review is available here:-

https://www.cactusandsucculentreview.org.uk/
by DaveW
Thu Feb 29, 2024 10:40 am
Forum: General
Topic: Pictures of cacti next to rocks in habitat
Replies: 8
Views: 375

Re: Pictures of cacti next to rocks in habitat

You can use any of my pictures I posted on my BCSS Travelogue. The later ones are habitat photos.

https://www.forum.bcss.org.uk/viewtopic.php?t=164681
by DaveW
Thu Feb 22, 2024 10:18 am
Forum: General
Topic: Is there a market for rare seed grown cacti species?
Replies: 9
Views: 414

Re: Is there a market for rare seed grown cacti species?

Rarity is often a matter of opinion and can vary county to country depending what's freely available in that country. Also some species are more desirable to collectors than others, therefore a not very attractive species may in fact be quite rare but there is not a widespread market for it. Take fo...
by DaveW
Tue Feb 20, 2024 5:53 pm
Forum: Cacti Identification
Topic: Is my plant Cephalocereus senilis or something similar?
Replies: 12
Views: 546

Re: Is my plant Cephalocereus senilis or something similar?

The crown is etiolated through growing in too low light. The centre should have similar spination to the sides. If kept in good light it should improve.
by DaveW
Fri Feb 09, 2024 10:25 am
Forum: General
Topic: Cactus Explorer
Replies: 1
Views: 254

Cactus Explorer

Latest edition of free to download Cactus Explorer is now available, plus all back issues.

https://www.cactusexplorers.org.uk/journal1.htm
by DaveW
Thu Feb 08, 2024 10:32 am
Forum: Cacti Identification
Topic: Got a cactus for gift
Replies: 5
Views: 455

Re: Got a cactus for gift

Incidentally Ossy the easy way to tell a Gymnocalycium apart from many other genera is neither the buds, flower tube or fruits have any hairs or bristles on them like your Notocactus (Parodia) does. "The genus name Gymnocalycium (from Greek, "naked calyx") refers to the flower buds be...
by DaveW
Wed Feb 07, 2024 11:17 am
Forum: Cacti Identification
Topic: Got a cactus for gift
Replies: 5
Views: 455

Re: Got a cactus for gift

Agree with Nino, but probably the longest spined form of Parodia (Notocactus) mammulosa known an N. turecekianus. https://www.cactus-art.biz/schede/NOTOCACTUS/Notocactus_turecekianus/Notocactus_turecekianus/Notocactus_turecekianus.htm Notocactus mammulosus used to be split into three different speci...
by DaveW
Wed Feb 07, 2024 10:42 am
Forum: General
Topic: Why can’t most cacti be Blue?
Replies: 3
Views: 376

Re: Why can’t most cacti be Blue?

As Spence says any blue in cacti is caused by the scattering of light and not true blue pigmentation. Cacti cannot have true blue flowers either. The only apparently blue flower = Wittia (Psudorhipsalis) amazonica is caused by its textured surface scattering light as in Morpho butterflies wings and ...
by DaveW
Tue Jan 30, 2024 10:37 am
Forum: Cacti Identification
Topic: Grew this from an old seed packet labelled Opuntia strigil, does that ID look correct to you all?
Replies: 6
Views: 467

Re: Grew this from an old seed packet labelled Opuntia strigil, does that ID look correct to you all?

Having glochids and sometimes barbed spines Opuntia's are probably some of the most "antisocial" cacti, hence Antticepp's joke. They also tend not to be grown much in countries where they cannot grow outdoors therefore take up too much greenhouse space as with tall Cerei. To those of us ou...