Search found 4525 matches

by greenknight
Tue Jun 28, 2022 5:06 am
Forum: General
Topic: Do Mammillaria have extrafloral nectaries?
Replies: 10
Views: 359

Re: Do Mammillaria have extrafloral nectaries?

There are over 200 species just of Mammillaria, I'm sure I haven't seen them all. Apparently there can be some variation even on the same plant - I found a page that shows M. pectinifera expelling some fruits while retaining others: https://www.researchgate.net/figure/Photograph-of-Mammillaria-pecti...
by greenknight
Mon Jun 27, 2022 10:43 am
Forum: Cacti Identification
Topic: Wigginsia sellowii?
Replies: 2
Views: 248

Re: Wigginsia sellowii?

Wigginsia sellowii (syn. Parodia sellowii, Notocactus selleowii) Is correct, I think.
by greenknight
Mon Jun 27, 2022 10:17 am
Forum: General
Topic: Good tasting Cacti
Replies: 5
Views: 253

Re: Good tasting Cacti

Mammillaria prolifera fruits are said to be very tasty, though I haven't tried them.
by greenknight
Sat Jun 25, 2022 7:24 am
Forum: General
Topic: Do Mammillaria have extrafloral nectaries?
Replies: 10
Views: 359

Re: Do Mammillaria have extrafloral nectaries?

Mammillaria flowers shrivel and shrink like that even if they are pollinated. Fruits begin to develop within the body of the cactus and emerge seemingly out of nowhere some time later - except for some species which are cryptocarpic, whose fruits remain hidden withing the body of the cactus. See: ht...
by greenknight
Fri Jun 24, 2022 7:18 am
Forum: Cultivation
Topic: Astrophytum help needed
Replies: 23
Views: 747

Re: Astrophytum help needed

When I did multiple quotes in the same post recently, it made the second one a quote within a quote - I used cut-and-paste to separate them. It does act a little funny sometimes.
by greenknight
Fri Jun 24, 2022 7:07 am
Forum: General
Topic: Do Mammillaria have extrafloral nectaries?
Replies: 10
Views: 359

Re: Do Mammillaria have extrafloral nectaries?

Maybe use peroxide to clean it, which would disinfect it as well.
by greenknight
Fri Jun 24, 2022 6:59 am
Forum: Member Blogs
Topic: Mrs.Green windowsills-growing cacti against the odds (links on page 9)
Replies: 200
Views: 27848

Re: Mrs.Green windowsills-growing cacti against the odds (links on page 9)

I suppose that they're still cladodes if they're separate segments, though it's hard to tell where one leaves off and the next begins. This cactus seems to have a prolific branching habit and is crested as well, which gives it a very complex structure1
by greenknight
Thu Jun 23, 2022 8:19 am
Forum: Sick Cacti - Pests, Diseases, etc.
Topic: Is thiram fungicide available in the USA?
Replies: 4
Views: 225

Re: Is thiram fungicide available in the USA?

Restricted pesticides are generally available only to those who have a commercial pesticide applicator license.
by greenknight
Thu Jun 23, 2022 8:09 am
Forum: General
Topic: How to harvest seed from P. ottonis
Replies: 6
Views: 250

Re: How to harvest seed from P. ottonis

It's very simple, you wait until the fruit splits ("dehisces" is the technical term), then you collect the seed. The only problem you might run into is you don't catch it right away and some seed gets away - I've never planted any P. schlosseri seed, seeds fall in the pot and grow there ne...
by greenknight
Wed Jun 22, 2022 2:59 pm
Forum: Member Blogs
Topic: Mrs.Green windowsills-growing cacti against the odds (links on page 9)
Replies: 200
Views: 27848

Re: Mrs.Green windowsills-growing cacti against the odds (links on page 9)

Seems the flowers on that Fero do get bigger. Looks great.

Also great to see that rescued monstose Opuntia came through so well, it was in rough shape.
by greenknight
Wed Jun 22, 2022 3:39 am
Forum: Sick Cacti - Pests, Diseases, etc.
Topic: Is thiram fungicide available in the USA?
Replies: 4
Views: 225

Re: Is thiram fungicide available in the USA?

Thiram is not available for home use in the US, though it is used by farmers.
by greenknight
Tue Jun 21, 2022 4:27 am
Forum: Cacti Identification
Topic: ID help please
Replies: 6
Views: 344

Re: ID help please

Looks more like P. mammulosa than anything else, I'd say. That is a highly variable taxon, also could be crossed with another Parodia.

Appears it was a bit etiolated, but it's now in better light. It's not bad, though - it's just become columnar at an earlier age than it would have.
by greenknight
Tue Jun 21, 2022 3:44 am
Forum: Cuttings & Offsets
Topic: Rooting a mammillaria from a top cut
Replies: 44
Views: 4527

Re: Rooting a mammillaria from a top cut

I wouldn't throw it out, just isolate and monitor it and to see if that spreads. If it has a slow-spreading infection you might still be able to get pups from it big enough to root before it dies.
by greenknight
Tue Jun 21, 2022 3:30 am
Forum: Cultivation
Topic: Can I plant them deeper?
Replies: 8
Views: 314

Re: Can I plant them deeper?

Just remember that roots are reluctant to grow upward, an extra surface layer is the last place you will get any root penetration. Evaporation will be the only thing drying that surface layer for quite a while.
by greenknight
Tue Jun 21, 2022 2:20 am
Forum: General
Topic: Heat index QUESTION
Replies: 8
Views: 356

Re: Heat index QUESTION

Wish I could take credit for it, Joe, but it hadn't occurred to me either until I started following this forum - those are ideas I picked up here. Roots of plants in the ground aren't subjected to as much heat or cold as the tops are, so they aren't as adapted for extreme temperatures. Even hot clim...