Hi David,
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Yes, there have been a few changes since 1993 and even since 2006.
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sintensii was =91raised=92 to spevcies in the 2006 paper; cylindraceum (which I treated as a nom. dub. in 1993) has been shown to be the same as A. alpinum and, as it was published earlier, now must be used.
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Arum lucanum is a syn. of A. cylindraceum (tackled in 2006)
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Regarding descriptions, sorry, but for most of those not in the book you have to go back to the original publication place. Of course this raises new problems in that most are not described in English.
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The full =91official=92 list for Arum is:
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1.=A0=A0=A0=A0=A0=A0 Arum alpinariae (K.Alpinar & R.R.Mill) P.C.Boyce
2.=A0=A0=A0=A0=A0=A0 Arum amoenum (Engl.) Dubovik
3.=A0=A0=A0=A0=A0=A0 Arum apulum (Carano) P.C.Boyce
4.=A0=A0=A0=A0=A0=A0 Arum balansanum R.R.Mill.
5.=A0=A0=A0=A0=A0=A0 Arum besserianum Schott
6.=A0=A0=A0=A0=A0=A0 Arum byzantinum Blume
7.=A0=A0=A0=A0=A0=A0 Arum concinnatum Schott
8.=A0=A0=A0=A0=A0=A0 Arum creticum Boiss. & Heldr.
9.=A0=A0=A0=A0=A0=A0 Arum cylindraceum Gasp.
10.=A0=A0 Arum cyrenaicum Hruby
11.=A0=A0 Arum dioscoridis Sm.
12.=A0=A0 Arum elongatum Steven
13.=A0=A0 Arum euxinum R.R.Mill
14.=A0=A0 Arum gallowayi sp. nov. ined.
15.=A0=A0 Arum gratum Schott
16.=A0=A0 Arum hainesii Agnew & Hadac ex H. Riedl
17.=A0=A0 Arum hygrophilum Boiss.
18.=A0=A0 Arum idaeum Coust. & Gandoger
19.=A0=A0 Arum italicum Miller=A0=A0=A0=A0=A0=A0
ssp. albispathum (Steven ex Ledeb.) Prime
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0ssp. canariensis (Webb. & Berth.) P.C.Boyce
20.=A0=A0 Arum jacquemontii Blume
21.=A0=A0 Arum korolkowii Regel
22.=A0=A0 Arum longispathum Reich.
23.=A0=A0 Arum maculatum L.
24.=A0=A0 Arum maurum (Braun-Blanq. & Maire) stat. nov. ined.
25.=A0=A0 Arum megobrebi Lobin, M.Neumann, Bogner & P.C.Boyce
26.=A0=A0 Arum melanopus Schott
27.=A0=A0 Arum nigrum Schott
28.=A0=A0 Arum orientale Bieb.
29.=A0=A0 Arum palaestinum Boiss.
Arum pictum L.f. =3D Gymnomesium pictum (L.f.) Schott
30.=A0=A0 Arum purpureospathum P.C.Boyce
31.=A0=A0 Arum rupicola Boiss.
32.=A0=A0 Arum sintenisii (Engl.) P.C.Boyce
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In addition to the above, I am aware of five further novel species (but of which I have seen only images) that are in cultivation in the USA, the Netherlands & Poland.
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I am also now convinced that my treatment of the species A. rupicola and A. orientale were both too broad: at least A. conophalloides, Arum consobrinum Schott, and A. incomptum probably need to be resurrected.
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Regarding =91refereeing=92 =96 no-one does this; it is all down to general acceptance.
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Peter
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The problem with writing a book is that you now become the expert on that subject, even when you want to go on to other things.=A0 I hope you bear with me (us).
Your 1993 book, "The Genus Arum," lists 25 species.=A0 I read in the publication of Arum megobrebi (2007?)=A0that there are now 29 species.=A0 I assume that numbers 26-28 were described in the 2006 revision of your book.
Is there someplace, other than the 2006 revision, that I can find those=A0descriptions?=A0 How many species are there now in 2011, what are they, and how can I find descriptions?
Also, if I read your book correctly (ref. page 133), arum detruncatum, as shown in Vol. 30 - 2007 issue of AROIDEANA should have been labeled as arum rupicola, var. rupicola.=A0 Was that an error in AROIDEANA?
Again, I apologize for my inability to read "scientific stuff," but aren't Bedalov and Kupfer suggesting that A. cylindraceum and A. sintensii are species=A0in their 2006 article "Studies on the Genus Arum" in Vol. 29 of AROIDEANA?=A0 Also, in their species charts, they seem to have omitted both A. alpinum and A. lucanum.=A0=A0If they are of the A.=A0alpinum =3D A. maculatum school, as described in your book, then I can understand why they may have omitted it.=A0 However, you have listed A. lucanum as being from Southern Italy, so=A0one would think that it should have been included in their charts?=A0=A0
So, just how many species are there now?=A0 What are they?=A0 Where can descriptions be found?=A0 And is a referee or umpire needed for taxonomists?
David Leedy, Arum=A0Fervidus Novus
From: D. Christopher Rogers <branchiopod@gmail.com>
Subject: Re: [Aroid-l] Growing arums in pots
To: "Discussion of aroids" <aroid-l@www.gizmoworks.com>
Date: Tuesday, January 24, 2012, 9:44 AM
I really was hoping. Ah, well. I just love that genus. I am watching to see how my collection of Arum survives now that I have moved to Kansas. I lost the purpureospathum. The Arum pictums are in pots, sitting in a cool window in my house, as they would never survive the cold here. The others seem to be okay, so far . . .
No, I did not see the "Decade of Change" paper . . . where was that published?
Probably never. The taxonomy and nomenclature will be kept up to date with periodic papers =96 did you get =91the =91Decade of Change=92 paper =96 but that aside the new monograph will be someone else=92s challenge!
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Very best as ever
=A0
Peter
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When are you going to publish a new, updated and expanded edition of your Arum book?
Hi Don,
I grew a lot of Arum in pots in the past. You need to use deep
straight-sided pots at least 12 inches, preferably 15 inches deep; the
problem is that pots this deep tend to be very wide too, so you may have to
shop around.
Growing media for the Mediterranean species (such as those that you list)
needs to have a good proportion of mineral soil and also should to be on the
alkaline side of neutral (8.5 or thereabouts). I used to mix a proprietary
peat-based soilless-potting medium with the same volume of good quality
sieved topsoil. To every 10 gallons of this mix I would add a heaped 6 inch
pot of 1/2 inch limestone chippings.
Tubers need to be planted ca half way down the pot. I used to re-pot
annually in late N Hemisphere summer (late August); by this time the tubers
will be becoming active but there won't be much root growth. Plant and then
water well and then don't water again until the shoots appear above soil.
Arum are greedy plants and well-repay heavy fertilizing by producing larger
tubers. I used to use a fertilizer branded for use on tomatoes. When
actively growing I would fertilize on every watering and the manufacturers
rate.
Under glass Arum need a buoyant atmosphere and high light. Ventilate well on
all but the very coldest days. The pots should also be given a fair bit of
room between - too close together and the plants can become very etiolated
and become prone to leaf fungus such as botrytis.
Arum flower towards the late middle of their growing cycle. Some gardening
books advocate easing back on water and ceasing fertilizer when the
inflorescences appear. This is wrong. The plants still have a few weeks
growing ability during flowering and it is at this time that nutrients from
the leaves are absorbed by the tuber; curtailing the growing period can mean
smaller tubers. I recommend that you keep the plants actively growing as
long as possible to ensure a decent sized (or better still, more) tubers for
the next year.
Once it is clear that the plants really are dying back (most leaves yellow)
stop fertilizing and reduce watering to just enough to stop the pot becoming
completely dry. While the plants are dormant it is better to leave the
tubers in the pot and not take them out. I experimented quite a lot of
tubers of which I had an excess and can say that tubers removed from the
soil and stored were always weaker than undisturbed tubers. It is also
important that the resting pots do NOT ecome excessively dry. Despite the
desiccated appearance of the Mediterranean countryside during summer digging
down a few inches always reveals damp soil. Arum (indeed all Med. aroids)
are always deep-buried in nature and certainly never become totally dry. It
is also worth keeping the resting pots someplace not too hot and certainly
not exposed to sun - again the soil in the wild is always cool at the level
the tubers occur, no matter how parched the countryside.
Hope this helps some
Pete
--
D. Christopher Rogers
((,///////////=3D=3D=3D=3D=3D=3D=3D<
785.864.1714
Crustacean Taxonomist and Ecologist
Kansas Biological Survey
Kansas University, Higuchi Hall
2101 Constant Avenue, Lawrence, KS 66047-3759 USA
Vice President, Southwest Association of Freshwater Invertebrate Taxonomists SAFIT.ORG
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--
D. Christopher Rogers
((,///////////=3D=3D=3D=3D=3D=3D=3D<
785.864.1714
Crustacean Taxonomist and Ecologist
Kansas Biological Survey
Kansas University, Higuchi Hall
2101 Constant Avenue, Lawrence, KS 66047-3759 USA
Vice President, Southwest Association of Freshwater Invertebrate Taxonomists SAFIT.ORG
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