-- Steve Marak|
---------- Forwarded message ----------
Date: Sat, 01 Apr 2006 12:26:28 +0000
Subject: RE: [Aroid-l] Dracontium amazonense
Reply-To : Discussion of aroids email@example.com>
Sent : Wednesday, March 29, 2006 8:23 PM
To : Discussion of aroids
Subject : [Aroid-l] Dracontium amazonense
I guess I`ll 'take' this one! (See querry from Scott, below)
The name, D. amazonense says it all---some species of Dracontium rarely go
dormant because the area where they grow in nature never/VERY seldom goes
dry for any period of time, the Amazon area being one of these regions.
Other species such as D. spruceanum are the same, while other Dracontium
species like D. asperum and others that occur naturally in areas that have a
distinct dry and wet season do go dormant when you gradually dry out their
growing medium. I would guess that with a mature tuber of D. amazonse one
could 'force' dormancy by drying it out gradually, like your larger tuber,
but the smaller ones 'want' to grow throught the year as they would be able
to do in nature, and so attain reproductive size ASAP.
Hope these insights help!
> (Querry from D. Scott Taylor)
I have growing the above species for a few years and can't quite figure out
patterns of dormancy. My larger tuber (flowering age) goes dormant in the
fall, but many of the smaller ones do not. Growth declines in the fall,
the petioles collapse, but remain green and cannot
be pulled from the tuber, and then new growth resumes in warmer weather: so
there is no real dormancy. I am in central Florida. Any ideas/insights?
-- Steve Marak
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