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Anyone growing Rhapis robusta?

Mandrew968

By Mandrew968
in DISCUSSING PALM TREES WORLDWIDE

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Mandrew968 Grand Master

Mandrew968

Posted
Posted

I like collecting the obscure species of Rhapis. I have, I think 8 species or so... right now, Rhapis robusta is catching my eye. Is anyone else growing this palm?

20160113_162859.jpg

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Pal Meir Grand Master

Pal Meir

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Posted
31 minutes ago, Mandrew968 said:

I like collecting the obscure species of Rhapis. I have, I think 8 species or so... right now, Rhapis robusta is catching my eye. Is anyone else growing this palm?

Did you grow your palm from seed? If so how old is it now? I have grown up a couple of Rh. robusta, but gave them away in 2008, only four years young. At that time the blades had only three wide, yellowish green leaflets.

Relying on Hastings 2003 and Henderson 2009 Rh. robusta has the following features:

Rhapis robusta
(1) 3-6 leaflets
(2) blades not split to the base
(3) pointed apices of leaflets
(4) ligules persistent
(5) stem to 1.2 cm diameter (without sheaths to 0.6 cm)

It would be interesting if you could take the measures of that palm. As it seems some blades have more than six leaflets. And how about the diameter of the stem(s)?

 

My photos at flickr: flickr.com/photos/palmeir/albums

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Mandrew968 Grand Master

Mandrew968

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I find those perameters of  the species are guidelines more than absolutes, but let me know what you would like to see closer and I will get it. I bought this palm from a grower locally and it was about a couple years ago. 

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Pal Meir Grand Master

Pal Meir

Posted
Posted
40 minutes ago, Mandrew968 said:

I find those perameters of  the species are guidelines more than absolutes, but let me know what you would like to see closer and I will get it. I bought this palm from a grower locally and it was about a couple years ago. 

The diameter of the stems: (1) without sheaths (?), (2) with old dried sheaths, (3) with newer still green sheaths. Is the diameter of the primary stem the same as of the suckers?

PS: Do you have also Rhapis micrantha? I think this is the ideal indoor Rhapis for rooms without a high ceiling.

My photos at flickr: flickr.com/photos/palmeir/albums

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DoomsDave Grand Master

DoomsDave

Posted
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Here's my specimen.

It was dug out of the ground and put in a pot. Rhapis hate that kind of treatment but it was either the pot or the 'dozer.

It's about 5 - 6 feet (2.6 - 3 M) tall.

049.thumb.JPG.6d7353c04da83af4cc335354db050.thumb.JPG.736b94a3b677f63fe8cce482f5051.thumb.JPG.7df136a19e35c09e6a12ca9db6

Let's keep our forum fun and friendly.

Any data in this post is provided 'as is' and in no event shall I be liable for any damages, including, without limitation, damages resulting from accuracy or lack thereof, insult, or lost profits or revenue, claims by third parties or for other similar costs, or any special, incidental, or consequential damages arising out of my opinion or the use of this data. The accuracy or reliability of the data is not guaranteed or warranted in any way and I disclaim liability of any kind whatsoever, including, without limitation, liability for quality, performance, merchantability and fitness for a particular purpose arising out of the use, or inability to use my data. Other terms may apply.

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Pal Meir Grand Master

Pal Meir

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I found an article on Rhapis robusta on a Chinese website [smbk.forestry.gov.cn]. According to that article the stem can reach a diameter to ca. 2 cm, so that I am not sure if a Rhapis sp. germinated in 2004 might be a Rh. robusta, although it looked from the start totally different to my other Rh. robusta germinated in 2003. The Rhapis robusta (2003) looked like the upper photo on the website of RPS, and the Rhapis (2004) (seeds sold as Rh. “excelsa”, what is definitely wrong) like the lower photo (http://www.rarepalmseeds.com/pix/RhaRob.shtml). It is very confusing that both palms shown on the RPS website are to be of the same species … :blink:

Rhapis robusta [cūzōngzhú]
(1) 3-6 [5-7*] leaflets (my Rhapis 2004: to 11) (* A photo of a “Rh. robusta” on that website shows a palm with over 10 leaflets.)
(2) blades not split to the base
(3) pointed apices of leaflets
(4) petiole 1.2 mm wide (my Rh. 2004: to 3.5 mm)
(5) ligules persistent
(6) stem with sheaths to 1.2 [2] cm diameter [2-2.5 m tall] (my Rh. 2004: to 1.7 cm diameter)
(7) stem without sheaths to 0.6 cm diameter

Rhapis sp. 2004 (photo 2015-07-26): To 11 leaflets; stem to 17 mm.

569b95c36ac82_Rhapishumilis2015-07-26.th

My photos at flickr: flickr.com/photos/palmeir/albums

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Jeff Searle Grand Master

Jeff Searle

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What many of us learned while attending the biennial in Thailand a few years back was that many plants in our collections are misidentified. So unless you have flowering plants that you can key out without other species growing nearby, it's extremely difficult to be sure on what you have. Noong Nooch Gardens has a world class collection of Rhapis spp.

Searle Brothers Nursery Inc.

and The Rainforest Collection.

Southwest Ranches,Fl.

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Mandrew968 Grand Master

Mandrew968

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10 hours ago, Jeff Searle said:

What many of us learned while attending the biennial in Thailand a few years back was that many plants in our collections are misidentified. So unless you have flowering plants that you can key out without other species growing nearby, it's extremely difficult to be sure on what you have. Noong Nooch Gardens has a world class collection of Rhapis spp.

Of that, you can be sure! 

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