Compare Clones, callosum,acmodontum and pearcei complex

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SlipperKing

Madd Virologist
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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

Paph%20callosum%20comp1_zpsswdfj4om.jpg


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

IMG_8448_zpsiesin8pk.jpg


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

Paph%20acmodontum%20comp1_zpsoqqek7xo.jpg


Here is the newest one opened

IMG_8454_zpsjsjvdwco.jpg


Now the leaves of all three plants

acmodontum%20leaves_zps3nfb3qcj.jpg


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

Phrag%20pearcei%20Little%20Angel1_zpsi1w6hy4p.jpg


ecuadorense from a fellow STer

Phrag%20ecuadorense1_zpsicknf7y0.jpg


And lastly, my awarded richteri 'Crooked Creek'

Phrag%20richteri%20Crooked%20Creek1_zps9fn9uzyv.jpg


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.

Phrag%20comp_zpsfmel13ev.jpg
 
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:
 
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
 
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.
 
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.
 
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 ?
 
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.
 
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