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 > > _______________________________________________ > > pbs mailing list > > pbs@lists.ibiblio.org > > http://www.pacificbulbsociety.org/list.php > > http://pacificbulbsociety.org/pbswiki/ > > > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://www.pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://www.pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/