[Aroid-l] Fw: Determining Amorphophallus storage needs

From: Susan B <honeybunny442 at yahoo.com> on 2018.10.19 at 01:22:31(24099) This was an old post I saved- Susan B HTML +More ----- Forwarded Message ----- From: Wilbert Hetterscheid To: 'Discussion of aroids' Sent: Saturday, September 1, 2007 10:31 AM Subject: Re: [Aroid-l] Determining Amorphophallus storage needs 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@gizmoworks.com > [mailto:aroid-l-bounces@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@www.gizmoworks.com > http://www.gizmoworks.com/mailman/listinfo/aroid-l > _______________________________________________ Aroid-L mailing list Aroid-L@www.gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l ------=_Part_616234_2124489939.1539912151361-- --==============(32502782740258871==

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