id please Palm with Blue Fronds

[Pal Meir]

ID please palm with blue fronds: I saw this palm with blue-white fronds in a very humid tropical hothouse in Berlin Botanical Garden, but couldn’t detect any label. The fronds remind of Dypsis decaryi, but the trunk is very slender.

[doranakandawatta]

it seems I recognize my Dypsis decaryi growing too much in the shade.

In Berlin hot house, I wouldn't be surprised if the amount of light would be less than Dypsis decaryi needs.

BUT:

beautiful picture of a beautiful planting

[dalmatiansoap]

Ravanea xerophila 

[Peter G]

Decaryi hybrid

[doranakandawatta]

6 minutes ago, dalmatiansoap said:

Ravanea xerophila 

maybe but it would be easier to tell with other picture of the petioles and trunk 

[Pal Meir]

14 minutes ago, doranakandawatta said:

it seems I recognize my Dypsis decaryi growing too much in the shade.

In Berlin hot house, I wouldn't be surprised if the amount of light would be less than Dypsis decaryi needs.

BUT:

beautiful picture of a beautiful planting

Thanks, Philippe! I too guessed that the humid and shady environment might have produced an atypical not so triangular shape. The palm has already a quite tall and very slender stem.

2 minutes ago, dalmatiansoap said:

Ravanea xerophila 

Yes , this was the other possibility I was guessing because of the lacking of the triangular shape.

http://www.palmpedia.net/wiki/Ravenea_xerophila

[doranakandawatta]

1 minute ago, Peter G said:

Decaryi hybrid

I am not sure botanic gardens are cultivating and showing hybrids

[Pal Meir]

3 minutes ago, Peter G said:

Decaryi hybrid

 

1 minute ago, doranakandawatta said:

I am not sure botanic gardens are cultivating and showing hybrids

I think so too that Berlin BG will exhibit only natural palms and no hybrids. — As the palm was growing on a site hidden because of maintenance work I couldn’t take better pics of the whole tree and not see the tag too.

[Peter G]

Decaryi hybrid

does it have a sucker growing?

[doranakandawatta]

The way the leaflets are staying attached to each other by a small string tells me: D.decaryi . 

[doranakandawatta]

Palm Meir,

Any other pictures of the Berlin botanic garden hothouse? it's worth a new topic in travel log!

[Peter G]

Decaryi hybrid

does it have a sucker growing?

[Pal Meir]

2 minutes ago, Peter G said:

Decaryi hybrid

does it have a sucker growing?

Here a detail of the stem; the 2nd still slender stem on the right hand looks like a sucker:

[Pal Meir]

3 minutes ago, doranakandawatta said:

Palm Meir,

Any other pictures of the Berlin botanic garden hothouse? it's worth a new topic in travel log!

The hothause:

[Peter G]

Decaryi X Mahajanga?

[Pal Meir]

3 minutes ago, Peter G said:

Decaryi X Mahajanga?

Only if this could be a natural hybrid, I believe. The Berlin BG is (or better: was) known for its palm specialists.

[Pal Meir]

The riddle was solved by @Alcibiades who is living in Berlin: It is an old but thin Dypsis decaryi.