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Arisaema Enthusiast Group (AEG) Discussion List (and other=
Arisaema Enthusiast Group (AEG) Discussion List (and other=
Mon Jun 19 02:52:08 CEST 2006
hardy Aroids)" <ARISAEMA-L at NIC.SURFNET.NL> Aroids)" <ARISAEMA-L at NIC.SURFNET.NL>
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From: Christopher Gussman <OlgaChrisEmily at MSN.COM>
Subject: Re: Arisaema triphyllum stewardsonii
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I wonder if stewardsonii CAN cross with regular triphyllums, or if it is ==
only kept separate by flowering time and habitat (although both overlap).
I mentioned this on the list before, but I will repeat that is funny how ==
little is known about basic inheritance of common phenotypes of A. triphy==
llum, despite the fact that almost everyone here grows a few different fo==
rms (I am as guilty as the rest). If we cross a green spathe form with a==
very dark spathe, do we create offspring intermediate in spathe color, o==
r is one color form dominant over the other(?). Deliberate pollination ==
of the seed parent would be necessary, as well as growing several of the ==
offspring to flowering size.
Yesterday I "found" a beautiful white candidissimum up in my garden. I h==
ave had this plant only two years and it is yet to offset. I am, however==
, afraid to relocate it
Happy father's day to all the dad's on this list!
----- Original Message -----
From: Gusman Guy
Sent: Friday, June 16, 2006 2:07 AM
To: ARISAEMA-L at NIC.SURFNET.NL
Subject: Re: Arisaema triphyllum stewardsonii
Christopher,
Thanks for this good in-depth look. As you say, the main character of ste==
wardsonii is found in conspicuous ribs along the spathe tube. Interesting==
to note that you never saw very dark-spathed
stewardsonii in the wild. This point is mentioned by D.C. Huttleston (in ==
his key, AROIDEANA, 1984): "Spathe tube strongly fluted; inside of spathe==
blade green with purple stripes mostly toward base, rarely wholly green,==
never wholly purple."
Sure that much remains to be learned about this group of plants.
Guy
>Guy-
>Thank you! The variability in the "common" triphyllum is tremendous! A f==
act that has been observed by most and much discussed on this list previo==
usly Looking at my own stewardsonii plants again tonight (currently sti==
ll in bloom), the leaf undersurfaces are smooth (I think I incorrectly s==
aid glaucous earlier). Perhaps also "shiny", but not enough that the lea==
f undersurface would seem distinctive to me if the plants were not in flo==
wer. Last week I was in upstate NY where I saw some stewardonii. Most o==
f the triphyllum triphyllum were finished flowering, but there were a few==
late stragglers. Interestingly, most of the late triphyllum seemed to h==
ave exceptionally dark spathes. I also have a dark-spathed clone which e==
merges and blooms the same time as my stewardonii. I have yet to get see==
d on either.
> The spathe ribs seem to be the most obviously distinguishing characte==
ristic. I have never seen a triphyllum with partial or incomplete ribs, ==
nor a very dark-spathed stewardsonii. A fun and interesting group of pla==
nts, and still a lot to be learned.
>
>
>----- Original Message -----
>From: Gusman Guy
>Sent: Thursday, June 15, 2006 3:52 AM
>To: ARISAEMA-L at NIC.SURFNET.NL
>Subject: Arisaema triphyllum stewardsonii
>
>Hello,
>The problem of Arisaema triphyllum stewardsonii is quite delicate and, a==
s seen from the recent discussions, is not that simple!
>
>Donald C. Huttleston who published papers on subsp. triphyllum, stewards==
onii, pusillum and quinatum has exhaustively studied the complex of A. tr==
iphyllum.
>- He selected the lectotype of stewardsonii in 1952 (N.L. Britton s.n., ==
NY Herbarium n=B0 133835).
>- In the Bulletin of the Torrey Botanical Club (vol. 108(4): page 480, 1==
981), he writes, about stewardsonii and pusillum:
>"leaves green, glossy".
>- In Aroideana (vol. 7(1): page15, 1984), he provides a key and writes, ==
about stewardsonii and pusillum:
>" the leaves are never glaucous beneath" (glaucous: covered with waxy bl==
oom, a grayish powdery coating)
>
>In his PHD Thesis (at the University of NC), Miklos Treiber (1980) also ==
speaks of the usual shiny aspect of the leaves undersides: "The leaves of==
subsp. stewardsonii and pusillum dorsally are usually nitid and only rar==
ely more or less glaucous."
>
>It is also enlightening to look at the Flora of North America, on the we==
b ( http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=22 00=
013 ) where it is mentioned, again about stewardsonii and pusillum:
>"Leaves polished or lustrous beneath, not glaucous."
>
>A few years ago, I got plants of stewardsonii from Roy Herold (from Mass==
achusetts). All of them have leaves whose aspect agrees with the above de==
scriptions.
>
>However, there are areas where different subspecies can be found growing==
together and hybridization cannot be excluded. That's maybe the origin o==
f some apparent discrepancies between original descriptions and plants gr==
own in our collections.
>
>Guy Gusman
>
>
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<HTML><BODY STYLE="font:10pt verdana; border:none;"><DIV>I wonder if =st=
ewardsonii CAN cross with regular triphyllums, or if it is only kept sepa==
rate by flowering time and habitat (although both overlap).</DIV> <DIV>&n==
bsp;</DIV> <DIV>I mentioned this on the list before, but I will repeat th==
at is funny how little is known about basic inheritance of common phenoty==
pes of A. triphyllum, despite the fact that almost everyone here grows a ==
few different forms (I am as guilty as the rest). If we cross a gre==
en spathe form with a very dark spathe, do we create offspring intermedia==
te in spathe color, or is one color form dominant over the other(?). ==
; Deliberate pollination of the seed parent would be necessary, as ==
well as growing several of the offspring to flowering size. </DIV> ==
<DIV> </DIV> <DIV>Yesterday I "found" a beautiful white candidissimu==
m up in my garden. I have had this plant only two years and it is y==
et to offset. I am, however, afraid to relocate it</DIV> <DIV> ==
;</DIV> <DIV>Happy father's day to all the dad's on this list!</DIV> <DIV==
> </DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5p=x;=
MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <D==
IV style="FONT: 10pt Arial">----- Original Message -----</DIV> <DIV s=ty=
le="BACKGROUND: #e4e4e4; FONT: 10pt Arial; COLOR: black"><B>From:</B>=G=
usman Guy</DIV> <DIV style="FONT: 10pt Arial"><B>Sent:</B> Friday, Ju=ne=
16, 2006 2:07 AM</DIV> <DIV style="FONT: 10pt Arial"><B>To:</B> ARIS=AE=
MA-L at NIC.SURFNET.NL</DIV> <DIV style="FONT: 10pt Arial"><B>Subject:</=B>=
Re: Arisaema triphyllum stewardsonii</DIV> <DIV> </DIV>Christopher,==
<BR>Thanks for this good in-depth look. As you say, the main character of==
stewardsonii is found in conspicuous ribs along the spathe tube. Interes==
ting to note that you never saw very dark-spathed<BR>stewardsonii in the ==
wild. This point is mentioned by D.C. Huttleston (in his key, AROIDEANA, ==
1984): "Spathe tube strongly fluted; inside of spathe blade green with pu==
rple stripes mostly toward base, rarely wholly green, never wholly purple==
"<BR>Sure that much remains to be learned about this group of plants.<BR=
>Guy<BR><BR><BR>>Guy-<BR>>Thank you! The variability in the "common==
" triphyllum is tremendous! A fact that has been observed by most and muc==
h discussed on this list previously Looking at my own steward==
sonii plants again tonight (currently still in bloom), the leaf undersurf==
aces are smooth (I think I incorrectly said glaucous earlier). ==
; Perhaps also "shiny", but not enough that the leaf undersurface would s==
eem distinctive to me if the plants were not in flower. Last week I==
was in upstate NY where I saw some stewardonii. Most of the triphy==
llum triphyllum were finished flowering, but there were a few late stragg==
lers. Interestingly, most of the late triphyllum seemed to have exc==
eptionally dark spathes. I also have a dark-spathed clone which eme==
rges and blooms the same time as my stewardonii. I have yet to get ==
seed on either. <BR>> The spathe ribs seem to ==
be the most obviously distinguishing characteristic. I have never s==
een a triphyllum with partial or incomplete ribs, nor a very dark-spathed==
stewardsonii. A fun and interesting group of plants, and still a l==
ot to be learned. <BR>> <BR>><B==
R>>----- Original Message -----<BR>>From: Gusman Guy<BR>>Sent: T==
hursday, June 15, 2006 3:52 AM<BR>>To: ARISAEMA-L at NIC.SURFNET.NL<BR>&g==
t;Subject: Arisaema triphyllum stewardsonii<BR>><BR>>Hello,<BR>>==
The problem of Arisaema triphyllum stewardsonii is quite delicate and, as==
seen from the recent discussions, is not that simple! <BR>><BR>==
>Donald C. Huttleston who published papers on subsp. triphyllum, stewa==
rdsonii, pusillum and quinatum has exhaustively studied the complex of A.==
triphyllum.<BR>>- He selected the lectotype of stewardsonii in 1952 (==
N.L. Britton s.n., NY Herbarium n=B0 133835). <BR>>- In the Bu=ll=
etin of the Torrey Botanical Club (vol. 108(4): page 480, 1981), he write==
s, about stewardsonii and pusillum:<BR>>"leaves green, glossy".<BR>>==
;- In Aroideana (vol. 7(1): page15, 1984), he provides a key and writes, ==
about stewardsonii and pusillum:<BR>>" the leaves are never glaucous b==
eneath" (glaucous: covered with waxy bloom, a grayish powdery coating)<BR==
>><BR>>In his PHD Thesis (at the University of NC), Miklos Treiber ==
(1980) also speaks of the usual shiny aspect of the leaves undersides: "T==
he leaves of subsp. stewardsonii and pusillum dorsally are usually nitid ==
and only rarely more or less glaucous."<BR>><BR>>It is also enlight==
ening to look at the Flora of North America, on the web ( http://www.eflo==
ras.org/florataxon.aspx?flora_id=1&taxon_id=222000013 ) where=it =
is mentioned, again about stewardsonii and pusillum:<BR>>"Leaves polis==
hed or lustrous beneath, not glaucous."<BR>><BR>>A few years ago, I==
got plants of stewardsonii from Roy Herold (from Massachusetts). All of ==
them have leaves whose aspect agrees with the above descriptions.<BR>>==
<BR>>However, there are areas where different subspecies can be found ==
growing together and hybridization cannot be excluded. That's maybe the o==
rigin of some apparent discrepancies between original descriptions and pl==
ants grown in our collections.<BR>><BR>>Guy Gusman<BR>><BR>><==
BR></BLOCKQUOTE></BODY></HTML>
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