[Arisaema-l] A. heterophyllum vs. tortuosum

[Guy Gusman]

Dear Charles,
I think you're right, your plants are heterophyllum and not tortuosum. I grow a few heterophyllums in a moist corner in the garden. On the other hand, from two years ago, I found self-sown seedlings of A. tortuosum everywhere in the garden as you see on the attached pic! 
All the best.
Guy





Le 28 mai 2016 à 19:23, 2csh a écrit :

> The late plant guru from the Atlanta area, Don Jacobs, gave out some Arisaema seeds at a meeting years ago, which he said were A. tortuosum. I planted mine and most came up and this year bloomed.
> 
> I have other grown seedlings of A. heterophyllum from a couple of sources which have been at blooming size now for a couple of years.
> 
> Looking in my Gusman book to check the ID, I find that the\ two species are similar, both classified in the Tortuosa section, but that the easiest point of differentiation seems to be that the central leaflet of the "horseshoe" shaped rachis for tortuosum is supposed to be the longest leaf, while the central leaf on heterophyllum is shorter than the leaves on either side.
> 
> I have attached two photos from my garden: the first is the Don Jacobs plant and the second is a known heterophyllum, now making seed (hopefully).
> 
> Don Jacobs was a very well regarded plantsman, but I am wondering if his plants are not misidentified as tortuosum, while they are really heterophyllum.
> 
> I will also say that in the relatively hot SE USA locality where I am, heterophyllum germinates and grows very well, while so far I have been unable to germinate any tortuosum (although I have some more this year from the SeedEx and will try again).
> 
> Are these plants both heterophyllum? Guy?
> 
> Charles Hunter
> Smyrna, Georgia USA zone 7
> 
> 
> <Arisaema tortuosum or heterophyllum 5-28-16.jpg><Arisaema heterophyllum 5-28-16.jpg>_______________________________________________
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