[Arisaema-l] A. heterophyllum vs. tortuosum

[Flight360]

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On 2016-05-31 10:16 AM, "Guy Gusman" <ggusman at skynet.be> wrote:

> 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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