Arisaema 2016

[Lesley Cox]

I love the oily look on the A. griffithii. Just where the light catches them I suppose.

[Maggi Young]

New arisaema species described!

From Pascal Bruggeman , via Facebook:
Dear all, after procrastinating for a while I finally published one of the species new to science I found during fieldwork in NE India, the publication is free to download here:
  Arisaema gracilentum, a new species of Arisaema (Araceae) from NE India     Author: P. Bruggeman
   Source: Blumea - Biodiversity, Evolution and Biogeography of Plants
Publisher: Naturalis Biodiversity Center
Download from this page:  http://www.ingentaconnect.com/content/nhn/blumea/pre-prints/content-nbc_blumea_0364

And this is Aaron Floden's illustration of this species:

[johnw]

     We collected fresh seed of Arisaema kiushianum & A. ringens in BC last January and sowed them immediately under lights.  The lasted until mid -April then all gradually collapsed.  I've set the pots outdoors in the hope they will resurrect, I hesitate to dig around to check on them.  Is this a common occurrence and if so should I dry them off or let them take the weather?  The former I'd hate to lose as it is a rarity in these parts.
[size=78%]johnw[/size]
 

[Gabriela]

     We collected fresh seed of Arisaema kiushianum & A. ringens in BC last January and sowed them immediately under lights.  The lasted until mid -April then all gradually collapsed.  I've set the pots outdoors in the hope they will resurrect, I hesitate to dig around to check on them.  Is this a common occurrence and if so should I dry them off or let them take the weather?  The former I'd hate to lose as it is a rarity in these parts.
[size=78%]johnw[/size]
 

All Arisaema sp. I started under lights (usually in February) will go dormant by June (in the best of case). I usually keep the pots outside and water only once in a while. Once I forgot about a consanguineum pot, it dry out completely and they were still fine next year (in fresh mix).
I also tried to 'cheat' one year and placed them in the fridge, in the idea to give a 'winter' and have them growing again by August, but I manage to froze the fargesii batch so I won't do it anymore. A. concinnum was fine. (this was the Arisaema sent by B. Porteous as a 'very tall' one to the ORGS seedex one year).

Good luck with ringens! I never got seeds true to name.

[Carolyn]

Gabriela,
I'm glad to read that your seedlings go dormant by June - mine have done that too. I thought I had mistreated them, because the mature arisaemas in the garden are still in full growth, so I expected the seedlings to be too. Mine get much more water than yours I think - I leave them out in an open frame, but they have always come through the winter and grown again.

[johnw]

Thanks for that Gabriela & Carolyn, I'm not so panic-stricken now.  Would it be more advisable to sow in Spring and have them grow till frost?  Then I suppose the question is should the seed be moist-stored or dry-stored - as I've heard some require  - but of which nothing is mentioned in the Arisaema books.

johnw

[Gabriela]

I don't know about moist stored Arisaema seeds John; never had any and never read about this requirement somewhere. But, since there are so many species, who knows...

For the ones that do germinate, in the end maybe it doesn't matter if sown in Jan.-Feb. or later. The most you can make them grow is 5-6 months anyway. The important thing is to water a lot, start fertilizing asap and of course use a good size pot when sowing so the tubers have space to develop (I learned my lesson). I just found them to be very good growers under lights, and can give them the attention that they wouldn't get later in the spring.

[Cfred72]

Plus classique, Arisaema flavum



Otherwise, I also had in May Arisaema triphyllum 'Jack in the Pipe'



Also useful arisaema



This Arisaema has a beautiful foliage, very remarkable in an overview

[Cfred72]

Last year we were worried that a contorted Arisaema might be viral.  By summer it was fine.  Reply 446 through 455 here - {url]http://www.srgc.net/forum/index.php?topic=950.435[/url]  It had been grown as A. sikokianum from Garden North seed but Wim's Arisaema guru thought it was a marked-leaf form of pure A. amurense.

Here it is almost a year later at the Lurker's and I wonder if all still agree it is amurense itself.

johnw

At home Arisaema amurense flowering in April. the foliage is different and more red in the cap.

[Gabriela]

You have beautiful Arisaema plants Fred! I like Arisaema utile, it is not hardy enough to try it here.

Just a note for A. triphyllum - is commonly called Jack-in the-pulpit 
A. amurense is quite a variable species and in Canada all species will flower 1-2 months later than in warmer areas.

[johnw]

Yet another Arisaema mystery.   This one came up in a pot of ciliatum one year and as a young plant was tentatively identified as A. consanguineum. As it matures it is becoming problematic yet again. Any thoughts?


Leaflet thread tips  - 100mm long
Leaflet excluding thread tips - 44cm long
Leaflet width at widest point - 13cm wide
Leaves tip to tip - 90cm wide
Plant height  - 1.3m high


john

[johnw]

And more of the same plant.


The flower on the main large plant is long past and seed is setting now. The flower shown is likely on a corm that was attached to the mother corm.


johnw

[johnw]

Last two shots of the brute including the corm in 2014. It was the corm that alerted us to it as a stray.


john

[Gabriela]

Last two shots of the brute including the corm in 2014. It was the corm that alerted us to it as a stray.
john

It looks very much like A. consanguineum to me John. Tubers can become gigantic if they last few years. Also, it can be very variable as the length of threads and size of the leaves, height....
If the fruit stalk will start bending down later on, then for sure it is consanguineum. Good genes

[pfirsich48]

Looks a lot like A. taiwanense