On 11/26/2010 4:19 PM, Marek Argent wrote:
Dear Steve,
I can only guess that they call
rhachis the part of the leaf with leaflets, as they describe
that the petiole is 15-35 cm long. My plant's total leaf
length is up to 120 cm. So possibly the petiole is the thick
part without leaflets and the rhachis is the rest of the leaf.
Look here:
moz-do-not-send="true"
href="http://www.thefreedictionary.com/rachis">http://www.thefreedictionary.com/rachis
"Botany the main axis or stem of an
inflorescence or compound leaf"
In your page I would rather
change "Philodendron" to "Amorphophallus" - a majority of the
amateur growers of Amorphophallus call the petiole "stem".
Although
growers that are family with plants such as a Philodendron
would likely call the petiole the "stem", in the case of
this species the true stem is an underground rhizome(...)
Best,
Marek
----- Original Message -----
From:
moz-do-not-send="true" title="Steve@ExoticRainforest.com"
href="mailto:Steve@ExoticRainforest.com">Steve Lucas/Exotic
Rainforest.com
To:
moz-do-not-send="true" title="aroid-l@gizmoworks.com"
href="mailto:aroid-l@gizmoworks.com">Discussion of Aroids
Sent: Tuesday, November
23, 2010 8:42 PM
Subject: [Aroid-l]
Zamioculcas zamiifolia
I addressed this to Anna Haigh at the Kew but I welcome input
from anyone familiar with this plant. I continue to receive
mail from folks telling me the page is wrong no matter how I
describe the central stalk that supports the leaflets which are
on short petiolules.
Anna, can you pass this along to someone that can give me an
accurate answer?
I have revised my page on Zamioculcas zamiifolia several
times over whether or not the plant's central stalk is a petiole
or a or a rachis and the leaflets are petiolulate. I found this
on cate this morning and it appears it has both but I can't
discern which is which.
href="http://www.exoticrainforest.com/Zamioculcas%20zamiifolia%20pc.html">http://www.exoticrainforest.com/Zamioculcas%20zamiifolia%20pc.html
Zamioculcas zamiifolia (Lodd.) Engl. sec CATE Araceae,
2009
Tuber subcylindric, ± 3-4 cm. in diameter or
more, tough, woody. LEAVES: Petiole green with
darker transverse blotches, 15-35 cm. long, 1-2 cm. in
diameter near base; blade 20-40 cm. long; leaflets 4-8 per
side, subopposite, distant, oblong-ovate to -elliptic to
-obovate, sometimes oblanceolate, fleshy, dark glossy green,
5-15 cm. long, 1.5-5 cm. broad, shortly acuminate, sessile
or shortly petiolulate, articulated to rhachis, cuneate to
rounded basally; rhachis terete, marked like petiole.
Will you take a look at the page or ask someone that is
knowledgeable about the plant to tell me exactly where the
rachis and petiole differ?
All the rest of the material was taken from Pete, Simon and
Josef's text The Genera of Araceaa and despite the fact growers
argue with me all the time I will take their word over that of
any grower that believes this plant should b grown dry. It does
grow in dry conditions part of the year, but it is not a desert
species!
Thanks a bunch!
Steve Lucas
href="http://www.ExoticRainforet.com">www.ExoticRainforet.com
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