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hbwr
Human


Registered: 10/28/13
Posts: 46
Last seen: 10 years, 7 days
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Help Identifying Cactus
#19241579 - 12/07/13 03:52 PM (10 years, 1 month ago) |
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I have this huge, beautiful stand of cactus growing beside my house, and I'm wondering if anybody can help me identify it please?
Edited by hbwr (12/12/13 02:58 PM)
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modern.shaman
San Mescalito




Registered: 05/09/12
Posts: 3,224
Loc: Zone 13
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Re: Help Identifying Cactus [Re: hbwr]
#19241606 - 12/07/13 04:00 PM (10 years, 1 month ago) |
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A closer picture would have been better. As far as I can tell its a Cereus Peruvianus (Peruvian Apple Cactus)
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verbage
White Squall


Registered: 11/02/13
Posts: 201
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Re: Help Identifying Cactus [Re: hbwr]
#19241608 - 12/07/13 04:01 PM (10 years, 1 month ago) |
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I'm going to guess Cereus Peruvianus. Has it been producing red fruits?
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Eddeee
Observer/messenger



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Re: Help Identifying Cactus [Re: verbage]
#19241627 - 12/07/13 04:06 PM (10 years, 1 month ago) |
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I would have to say Cerus Pruveanus and a nice specimen at that.
-------------------- Don't read books study life then write books we are nothing but atoms trying to figure out what atoms are.
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hbwr
Human


Registered: 10/28/13
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Re: Help Identifying Cactus [Re: hbwr]
#19241655 - 12/07/13 04:14 PM (10 years, 1 month ago) |
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Hey thanks for the fast replies!
Edited by hbwr (12/12/13 02:58 PM)
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verbage
White Squall


Registered: 11/02/13
Posts: 201
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Re: Help Identifying Cactus [Re: hbwr]
#19241711 - 12/07/13 04:34 PM (10 years, 1 month ago) |
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Cereus Peruvianus have white flowers. The lack of fruit could be explained by a lack of bees in your area. Here is a quote from a study related to Cereus Peruvianus. Relevant part is in bold. Edit - Will PM source if you would like.
The flowering and pollination requirements of Cereus peruvianus (L) Mill. (Cactaceae) were investigated in Beer Sheva, Israel, in a three-year-old plantation which had been established from seedlings, in order to domesticate this plant as a fruit crop. Plants flowered during the hot season (May-October), and flowers opened for one night only. Variations were observed in the flowers' opening time, with the early-opening plants beginning to open two hours before sunset, and the late-opening plants opening close to sunset. Flowers were visited only by day-active insects: the honey bee (Apis mellifera) and the carpenter bee (Xylocopa pubescens). The visitors' behavior indicated that they were involved in pollination. Early-opening flowers were visited both in the evening and in the morning, whereas late-openers were visited only in the morning. C. peruvianus was found to be self-incompatible, and fruit set did not occur when flowers were hand self-pollinated. Hand cross-pollination resulted in very high fruit set (92%) and heavy fruits with a high seed number. Fruit set, seed number, and fruit weight were lower in open-pollination than in hand cross-pollination. This indicates limited pollination or fertilization in open- pollination and might be related to the briefness of the bee visits, reduced pollen germinability, and stigma receptivity during part of the visit period.
Edited by verbage (12/07/13 04:35 PM)
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karode13
Tāne Mahuta




Registered: 05/19/05
Posts: 15,290
Loc: LV-426
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Re: Help Identifying Cactus [Re: verbage]
#19242406 - 12/07/13 08:02 PM (10 years, 1 month ago) |
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Quote:
verbage said: Cereus Peruvianus have white flowers. The lack of fruit could be explained by a lack of bees in your area.
According to the article you posted they're self sterile. If that's only one plant or a group from one clone, then it cannot produce fruit.
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verbage
White Squall


Registered: 11/02/13
Posts: 201
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Re: Help Identifying Cactus [Re: karode13]
#19242498 - 12/07/13 08:30 PM (10 years, 1 month ago) |
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Great point, Karode! That's also how I understand the article. I don't disagree with them on their statement.
I'll add this though... There is a home two miles from mine with a single Cereus Peruvianus in their yard. I have seen fruit on that particular cactus. However, there may be other CPs somewhere on their property that I can't see.
Edited by verbage (12/07/13 08:31 PM)
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karode13
Tāne Mahuta




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Posts: 15,290
Loc: LV-426
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Re: Help Identifying Cactus [Re: verbage]
#19242521 - 12/07/13 08:36 PM (10 years, 1 month ago) |
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I was out at a large cactus gardens with a few mature Cereus and the owner confirmed what the article says about self sterility. Maybe that solitary cereus of yours is being tricked by some other pollen, chances are that's it's just a close by relative.
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hbwr
Human


Registered: 10/28/13
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Re: Help Identifying Cactus [Re: hbwr]
#19245769 - 12/08/13 04:03 PM (10 years, 1 month ago) |
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Thanks everybody,
It's nice to know now what this cactus is. I had a very, very slim hope that somebody would tell me that it's a Pachanoi and if it was I would have asked my neighbour for a whole load of cuttings if it was! It still looks really impressive though!
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LSoares
Farmer



Registered: 10/09/13
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Re: Help Identifying Cactus [Re: hbwr]
#19249034 - 12/09/13 07:39 AM (10 years, 1 month ago) |
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If I may, just a slight and unimportant correction: while the name Cereus peruvianus is the one used worldwide to refer to that species, it cannot be traced back to any wild population. Hence, it's an unusable name. Those plants are currently referred to as Cereus hildmannianus (even if everyone knows what a Cereus peruvianus is and most people will make a loud "huh?" when you speak of C. hildmannianus).
I used to have one of those planted next to another that was most likely a Cereus jamacaru. Since they flowered a few weeks apart (and I'll be damned if I could tell one flower from the other), I never had fruits. On one particular year, though, some overlap must have happened that I had two fruits and s***loads of seeds. When sowed, the seeds germinated perfect and quickly, the cotyledons opened and the first areoles appeared, but the seedlings never passed from that stage and slowly perished, sometimes over months. That's the most bizarre sterility evidence I've ever come across. After a number of tries, I eventually tossed the remaining seeds in the garbage.
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verbage
White Squall


Registered: 11/02/13
Posts: 201
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Re: Help Identifying Cactus [Re: LSoares]
#19251205 - 12/09/13 05:00 PM (10 years, 1 month ago) |
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Good stuff Z! Thanks for the informative post. Great blog also.
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LSoares
Farmer



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Re: Help Identifying Cactus [Re: verbage]
#19253686 - 12/10/13 02:04 AM (10 years, 1 month ago) |
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Quote:
verbage said: Good stuff Z! Thanks for the informative post. Great blog also.
Thank you.
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nicechrisman
Interdimensional space wizard



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Re: Help Identifying Cactus [Re: hbwr]
#19254309 - 12/10/13 08:24 AM (10 years, 1 month ago) |
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Looks like it has scale
-------------------- "Cosmic Love is absolutelely ruthless and highly indifferent: it teaches its lessons whether you like/dislike them or not." John C. Lily
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