[Aroid-l] Determining Amorphophallus storage needs

From: aroidgrower at gmail.com (John Ludwig) on 2007.09.01 at 17:57:45(16194) Thank you Wilbert, Thank you wilbert for clearing this up for me. I know now that I should be thinking differently on this matter. It is obvious to me now that I need to get a reprint of Vol. 19 as reference. I look forward to any published works of Mr. Avent and Mr. Galloway on this topic. Regards, John +More On 9/1/07, Wilbert Hetterscheid wrote: > Hi John and other peoples, > > I cannot confirm your observation. In fact I have noticed quite the > opposite. In my collection, the ones that need continuous soil and/or > watering always have roots spread all over the tuber that usually are > healthy when the leaf has already died down. The ones that need dry > conditions and have lost their leaves, are usually also without roots or > have dead or dying roots. > > My experience and that of others written to me, have changed my views on > dormancy issues in Amorphophallus quite dramatically over the years since my > publication with Ittenbach in Vol. 19 of Aroideana. > > Generally it seems that species from (West-)Central Africa, West Malaysia, > Borneo, Java, Sumatra, S. & SE China and N. Vietnam need to be kept in soil > all the time. They tend to have rather short dormancies or nearly none at > all. They are from very wet areas (everwet tropical). During growth they can > hardly be "overloaded" with water during watergift. Species for which this > works good are: > > angolensis > angulatus > annulifer > bangkokensis > baumannii > beccarii > borneensis > boyceanus > brachyphyllus > bufo > coaetaneus > costatus > croatii > decus-silvae > discophorus > dzuii > eburneus > eichleri > elegans > excentricus (is also quite drought resistant) > galbra > gigas > glossophyllus (also quite drought resistant) > hayi > hetterscheidii > hewittii > hirsutus > hottae > infundibuliformis > interruptus (also quite drought resistant) > julaihii > koratensis (when young) > lambii > manta > myosuroides > ochroleucus > opertus > palawanensis (can also be stored dry) > pendulus > prainii > preussii > rhizomatosus > rugosus > sagittarius > scaber (only when young) > sinuatus > sparsiflorus > spectabilis > staudtii > subpedatus > tinekeae > titanum > tonkinensis > tuberculatus > venustus > verticillatus > zenkeri > > Unfortunately, this behaviour makes them the more difficult species to grow > (except the ones from N. Vietnam, S. & SE China and A. hottae). The ones > that have a prolongued dormancy are usually the stronger ones in cultivation > and need less humid conditions. > > Then the smallest of species also appreciate not to be bone dry but they > must also be watered carefully and not become too wet. They too tend to have > hardly any appreciable dormancy and flower immediately after leaf shed or > alongside mature leaves: > > myosuroides > obscurus > ongsakulii > polyanthus > pusillus > serrulatus > > I think Tony Avent and Alan galloway may have plans to pubblish on this. In > case the IAS board decides to reprint vol. 19, I will add a text on this > subject as introduction. > > Of course it may be that under local circumstances at individual people's > places, plants may have a deviating behaviour. But this is merely a general > directive. > > Cheerio, > Wilbert > > > > > -----Oorspronkelijk bericht----- > > Van: aroid-l-bounces at gizmoworks.com > > [mailto:aroid-l-bounces at gizmoworks.com] Namens John Ludwig > > Verzonden: vrijdag 31 augustus 2007 11:39 > > Aan: Discussion of aroids > > Onderwerp: [Aroid-l] Determining Amorphophallus storage needs > > > > > > I have noticed one similarity in determining a tuber's need > > to be stored in soil or dry. I have noticed that the tubers > > that need storage in soil are predominantly the ones that > > grow their roots from the top of the tuber. > > > > Is this a correct observation and can I apply this rule of > > thumb to all Amorph's? > > > > Are there exceptions that I am currently unaware of? > > > > I have also noticed that all of the ones that I can store dry > > seem to have a smooth skin that seem to be shiny\waxy in appearance. > > > > I have also weighed my tubers to see if they have been losing > > weight due to dessication. > > > > When a new species is discovered, How are it's needs determined? > > _______________________________________________ > > Aroid-L mailing list > > Aroid-L at www.gizmoworks.com > > http://www.gizmoworks.com/mailman/listinfo/aroid-l > > > > _______________________________________________ > Aroid-L mailing list > Aroid-L at www.gizmoworks.com > http://www.gizmoworks.com/mailman/listinfo/aroid-l >

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