Compare Clones, callosum,acmodontum and pearcei complex

Slippertalk Orchid Forum

Help Support Slippertalk Orchid Forum:

SlipperKing

Madd Virologist
Joined
Sep 16, 2007
Messages
18,949
Reaction score
243
Location
Pearland TX
I've posted the vinicolored callosum already but here it is stacked up against a standard Thai callosum and a sibling plant not quite open yet



This PIC came out pretty cool so I thought you all might like to see the "halo" in the callosum dorsal.



My three acmodontums all blooming. All of the same cross.



Here is the newest one opened



Now the leaves of all three plants



Moving on to the green Phrags.
First is my awarded pearcei 'Little Angel'



ecuadorense from a fellow STer



And lastly, my awarded richteri 'Crooked Creek'



Now all three together.
I personally don't see how someone could confuse richteri with either one of the others. I could be in possession of three of the most extreme examples and be way off.

 

abax

ST Supporter
ST Supporter
Joined
Jul 9, 2011
Messages
10,924
Reaction score
209
Location
Kentucky zone 6B
Interesting comparison, but I'm not knowledgable enough
about green Phrags. to see small differences. I do see
some large differences however...I think.
 

Bjorn

Well-Known Member
Joined
Sep 6, 2010
Messages
1,714
Reaction score
0
Location
S. Norway
The flowers seem very similar, so looking at flower pictures one may wonder whether or not its the same species. However, seeing the size-comparison in the last picture its easier to accept that they could be different species. I have an equadorense myself and it is indeed a tiny plant. Guess the yellowing leaves in the last picture belongs to that one, right Rick?
Judging by size alone is not a good indicator for species though;). I have myself similar size-differences between flowering Eumelia Arias so one obviously hve to be careful here.:eek:
 

SlipperKing

Madd Virologist
Joined
Sep 16, 2007
Messages
18,949
Reaction score
243
Location
Pearland TX
Thanks Jean. That's right Bjorn. It has heavy turnover of leaves but it grows excessively fast too. I can't figure out how to slow the leaf loss. Its in S/H, weak N (10-20 ppm) and not every watering. Maybe this species/variety needs higher nitrogen levels. It has a massive root system as seen through the plastic container. Its also one of the few Phrags that gets leaf tip burn which would say there's too much salt present. Any ideas?

Sent from my SGH-T999 using Tapatalk
 

Bjorn

Well-Known Member
Joined
Sep 6, 2010
Messages
1,714
Reaction score
0
Location
S. Norway
Thanks Jean. That's right Bjorn. It has heavy turnover of leaves but it grows excessively fast too. I can't figure out how to slow the leaf loss. Its in S/H, weak N (10-20 ppm) and not every watering. Maybe this species/variety needs higher nitrogen levels. It has a massive root system as seen through the plastic container. Its also one of the few Phrags that gets leaf tip burn which would say there's too much salt present. Any ideas?

Sent from my SGH-T999 using Tapatalk
Not really, mine tend to have a bit of the same, perhaps not as much, my N fertilisation lies around 15-20ppm but in all water. I do not see any leaf tip burn though, touch wood;)
More N could be something, what about ammonium/nitrate ratio? Mine is close to 2/1.
 

eteson

Phragmad
Joined
Apr 16, 2013
Messages
1,396
Reaction score
2
Location
Bogotá (Colombia)
Nice pictures
IMHO ecuadorense and pearcei are the same thing .You can find very small differences (size? and petal angle) to split them in two species. Richteri=Taras=Merinoi is a hybrid and can be easily distinguished from pearcei.
 

Brabantia

Well-Known Member
Joined
Oct 2, 2007
Messages
1,385
Reaction score
3
Location
Belgium
Not really, mine tend to have a bit of the same, perhaps not as much, my N fertilisation lies around 15-20ppm but in all water. I do not see any leaf tip burn though, touch wood;)
More N could be something, what about ammonium/nitrate ratio? Mine is close to 2/1.
How do you manage the pH of your potting whit such high ratio NH4+/NO3_ ? Sometimes dit you measure the pH by the pour throug method ?
 

Bjorn

Well-Known Member
Joined
Sep 6, 2010
Messages
1,714
Reaction score
0
Location
S. Norway
How do you manage the pH of your potting whit such high ratio NH4+/NO3_ ? Sometimes dit you measure the pH by the pour throug method ?
There is a generous amount of citric acid in the system so the system is well buffered and the initial pH of the fertilising water is around 5.5-6 (at 50-60ppm).
I have measured pour-through a couple of times and never found any different from what I feed in , pH 5-6..
This story about acidifying of the substrate by NH4+ uptake is probably true for regular plants in soil but for paphs I think it is questionable.
Remember, also paphs have velamen, secondly; at least I pour so much water (with fertiliser) through every day that the possible influence iof the plants metabolites is totally irrelevant. But generally, ammonium(NH4+) in water gives an acidic reaction that is true;) But that is not because of any plant metabolism.
 
Last edited:

Latest posts

Top