what is considered bulbous

David Ryle dryle@wi-net.com
Thu, 24 May 2007 20:20:20 PDT
All plants that grow from what would commonly be thought of as a bulb etc; 
are known botanically as geophytes. By definition a geophyte is a plant that 
grows from a modified leaf that has evolved into a storage organ.
----- Original Message ----- 
From: "Agoston Janos" <agoston.janos@citromail.hu>
To: "Pacific Bulb Society" <pbs@lists.ibiblio.org>
Sent: Wednesday, May 23, 2007 1:09 PM
Subject: Re: [pbs] what is considered bulbous


>I have performed a presentation in a scientifical session in 2005 here. 
>Please find the PPT here: http://viraghagymasz.hu/cikk/Lippay_2005_en.pdf
>  ----- Original Message ----- 
>  From: Jan Agoston
>  To: Pacific Bulb Society
>  Sent: Wednesday, May 23, 2007 7:58 PM
>  Subject: [pbs] what is considered bulbous was: Re: Weedy Bulbs
>
>
>  Dear Roger and All,
>
>  >From my opinion you are a lucky guy, cause you have so many nice "weedy"
>  bulbs. For me Scilla siberica propagates well from seeds (more than
>  desired...). Viola sororia is also propagating well. (It has here thich
>  rhizomes, so can be a bulbous plant..)
>
>  My main question would be what is considered as a bulbous plant?
>  My opinion is bulbsous plant (sensu lato) can be plants wit the folowing
>  propagating parts: bulb, corm, tuber, rhizome, taproot, tuberous root
>  system, pseudobulb (I call it pseudocorm, cause it behaves like corms, 
> but
>  it is over the soil level).
>
>  In Holland there are generally bulbs (tulips, daffodils, etc...) and 
> there
>  are also plants somewhere sold as bulbs somewhere sold as perennials. PT 
> and
>  APIH does not indicates which taxa should be considered bulbous. So does
>  anybody have some good definition for bulbs? (sensu lato or sensu 
> stricto)
>
>  Thank you,
>  Jani
>
>  2007/5/23, totototo@telus.net <totototo@telus.net>:
>  >
>  > While cleaning up the garden, it struck me that some bulbous plants
>  > are very weedy, spreading overly freely by seed, offsets, or both.
>  >
>  > Different climates and different soils will have different weedy
>  > bulbs, but in my garden with its heavy, dampish soil and a cool
>  > Mediterranean climate, the worst offenders (which include a few
>  > surprises) are...
>  >
>  > Allium: A. christophii, A. karataviense, A. roseum.
>  >
>  > Brodiaea howellii This spreads like a mad thing by offsets. My form
>  > may be a sterile triploid. Another Brodiaea, possibly B. coronaria,
>  > has similar propensities to seek lebensraum.
>  >
>  > Camassia leichtlinii, both ssp. leichtlinii (the uncommon creamy-
>  > white type) and ssp. suksdorfii (violet-blue), also a commercial form
>  > I've lost the name of.
>  >
>  > Chionodoxa has a habit of turning up as single seedlings in the
>  > oddest places. As long as I round them up and put them in their
>  > corral with other small blue bulbs, they're fine, but ignore them and
>  > my garden would gradually turn into a sea of sapphire blue.
>  >
>  > Eranthis hyemalis is a prolific self-sower, but so welcome that I am
>  > reluctant to designate it as a weed.
>  >
>  > Hyancinthoides hispanica, H. non-scripta (what is the currently
>  > accepted generic name for these?)
>  >
>  > Muscari aucheri 'Blue Boy'; M. armeniacum 'Valerie Finnis', to my
>  > despair, tried to set seed this year, but I have removed the unripe
>  > capsules.
>  >
>  > Nothoscordum inodorum
>  >
>  > Ornithogalum umbellatum
>  >
>  > Oxalis oregana, both pink- & white-flowered forms, though they are
>  > not bulbs and perhaps not strictly grist for the PBS mill. The white-
>  > flowered form in is a true thug, in leafy soil spreading far and wide
>  > by thin rhizomes that look like nothing so much as pink spaghetti.
>  >
>  > Trillium rivale - the vigorous form that may, or may not, be a hybrid
>  > with T. ovatum and may or may not properly be called 'Del Norte'. [I
>  > am still stirring that pot offline, but no definite results can be
>  > announced as yet.] The difficulty is that every seed germinates!
>  >
>  > Tulipa sprengeri. I encourage this, however, scattering the seed; its
>  > bright red is very welcome in May.
>  >
>  >
>  >
>  > --
>  > Rodger Whitlock
>  > Victoria, British Columbia, Canada
>  > Maritime Zone 8, a cool Mediterranean climate
>  >
>  > on beautiful Vancouver Island
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