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  Re: [Aroid-l] Alocaisa gageana
From: "Christopher Rogers" <crogers at ecoanalysts.com> on 2009.08.11 at 17:58:27

Fascinating!

 

Thanks, Peter! So, obviously I had a few things confused.I am glad to know you are working on the group, and I hope that I can get areprint when you publish.

 

You said that these plants send up a pair ofinflorescences. My A. odora and my A. macrorrhizos have sent up singleinflorescences, paired and sometimes three inflorescences. Am I seeingsomething different, or could this be ecophenotypic variation?

 

I really enjoy the genus Alocasia, and I do want to learnall I can about the taxonomy. I appreciate your help, and if you ever need anyhelp with freshwater crustacean taxonomy, let me know. I be happy to return thefavor!

 

Thanks for the help!

Christopher

 

D.Christopher Rogers

SeniorInvertebrate Ecologist/ Taxonomist

((,///////////=3D=3D=3D=3D=3D=3D=3D<

 

EcoAnalysts, Inc.

1.530.383.4798

P.O. Box 4098

Davis, CA 95616

USA

 

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-----Original Message-----
From: aroid-l-bounces@gizmoworks.com [mailto:aroid-l-bounces@gizmoworks.com] OnBehalf Of Peter Boyce
Sent: Sunday, August 09, 2009 11:53 PM
To: 'Discussion of aroids'
Subject: Re: [Aroid-l] Alocaisa gageana

 

Hi Christopher,

 

These trans-Himalayan large-leaved Alocasia are taxonomicbeasts! I=E2=80=99ve

recently tackled the northern Thai species and this isthe current status

for those that I investigated.

 

What you describe as gageana is almost certainly odora;also it is very

likely that gageana is a syn. of odora BUT the type (ofgageana) is missing

(presumed desctroyed) from Berlin and Engler=E2=80=99sdescription is too incomplete

to pin the name.

 

What you have as odora (yellow spathe) is definitely A.navicularis.=C2=A0

 

Alocasia macrorrhizos is almost certainly OK, but spathecolour is very

variable, from white, pinkish, purplish, and =E2=80=98yellow=E2=80=99(actually somewhat

cream).

 

All of these species produce pairs of inflorescencesarising in the leaf

axil (actually terminal on a branching module and thendisplaced by a new

leaf and thus appearing axillary.

 

Other names for the transhimalaya in this=E2=80=98macrorrhizos/odora=E2=80=99 complex are:

 

 

Alocasia cadieri Chantrier, Rev. Hort. 26: 326 (1939)

Alocasia cochinchensis, Pierre ex Engl. & K.KrausePflanzenr., IV, 23E: 103

(1920)

Alocasia decipiens Schott, Bonplandia (Hannover) 7: 28(1859)

Alocasia decumbens Buchet, Bull. Mus. Natl. Hist. Nat.,II, 11: 417 (1939)

Alocasia evrardii Gagnep., Fl. Indo-Chine 6: 1150=C2=A0 (1942)

Alocasia fallax Schott, Bonplandia (Hannover) 7: 28(1859)

Alocasia fornicata (Roxb.) Schott, Oesterr. Bot.Wochenbl. 4: 410 (1854)

Alocasia grandis Clemenc., Rev. Hort. 1868: 380 (1868)

Alocasia grata Prain ex Engl. & Krause, Pflanzenr.,IV, 23E: 93 (1920)

Alocasia hainanensis K.Krause, Pflanzenr., IV, 23E: 91(1920)

Alocasia hainanica N.E.Br., J. Linn. Soc., Bot. 36: 183(1903)

Alocasia lecomtei Engl., Pflanzenr., IV, 23E: 90 (1920)

Alocasia liervalii H=C3=A9rincq, Hort. Franc.: 243 (1869)

Alocasia longifolia Engl. & K.Krause, Pflanzenr., IV,23E: 103 (1920)

Alocasia montana (Roxb.) Schott, Oesterr. Bot. Wochenbl.4: 410 (1854) -

almost certainly the correct name for A. hynosa

Alocasia putii Gagnep., Fl. Indo-Chine 6: 1150 (1942)

Alocasia tonkinensis Engl., Pflanzenr., IV, 23E: 91(1920)

 

A LOT to do!

 

 

Alocasia robusta produces clusters of up to 20inflorescences in the

=E2=80=98middle=E2=80=99 of the plant, with the entire cluster then=E2=80=98pierced=E2=80=99 by the newly

emerging leaf, and is not part of the above complex,being closest to A.

puber, A. sarawakensis, etc.

 

Cheers

 

Peter

 

From: aroid-l-bounces@gizmoworks.com[mailto:aroid-l-bounces@gizmoworks.com]

On Behalf Of Christopher Rogers

Sent: 10 August 2009 03:40

To: Discussion of aroids

Subject: Re: [Aroid-l] Alocaisa gageana

 

Howdy, Pete!

 

I thought I had a handle on the large green, entire leafmargin Alocasia. My

understanding was that A. gageana had a green erectspathe, leaf sinus

reaching petiole; A. odora has a yellow erect spathe,and; A. macrorhiza had

a reflexed yellow spathe, with the leaf sinus notreaching the petiole. I am

not sure how A. robusta is separated out. So, I amsurprised to hear that A.

gageana is a nomen dubium. Can you help me out onseparating these beasts?

 

Cheers,

Christopher

 

D. Christopher Rogers

Invertebrate Ecologist

 

Telephone: 530.383.4798

 

EcoAnalysts, Inc.

PO Box 4098

Davis, CA 95616

USA

 

 

 

 

________________________________________

From: aroid-l-bounces@gizmoworks.com on behalf of PeterBoyce

Sent: Sat 08-Aug-09 6:58 PM

To: 'Discussion of aroids'

Subject: Re: [Aroid-l] Alocaisa gageana

Hi Barbara

 

This will be almost certainly Alocasia macrorrhizos inone of its numerous

colour forms. Alocasia gageana was described fromnorthern Burma and is an

nom. dub.

 

Peter

 

From: aroid-l-bounces@gizmoworks.com[mailto:aroid-l-bounces@gizmoworks.com]

On Behalf Of Barbara

Sent: 07 August 2009 05:28

To: aroid-l@gizmoworks.com

Subject: [Aroid-l] Alocaisa gageana

 

I purchased a plant labeled as Alocasia gageana aureavariegata but think I

read somewhere that aurea is not the proper name. I did asearch on the

Aroidean but did not find the correct name. I am a novicebut would like to

make sure the names are correct. I would appreciate anyhelp.

Barbara

 

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