Hi Borneo,
I had never seen one of them before but apparently it isn't such a rare plant, it is extremely showy though when it's in full bloom, when I walked in the nursery and saw it my eyes almost popped out of my head, lol
I took the picture at a nursery called Cottage Gardens of Petaluma
(
http://www.cottagegardensofpet.com/ ) In Northen California, zone 9a, their plant is huge and it's growing on the ground.
It comes in several colors (red, green, pink, purple, violet, orangy) and the flowers are different depending on what variety of amaranthus you have, some are pendant, some are spikes, some are in the shape of little balloons, it's a beautiful plant but I read somewhere that is an annual? They are super fast growers and easy to grow by seed though.
I'm sorry I can't be of much help, I'm in the same position you are, I just discovered this plant and fell in love with it but don't know a whole lot about it.
I saw your thread and the pic of your plant, it is definitely an amaranthus, it doesn't look exactly like the one in my pics though, notice how my plant's blooms look like pearls on a string and yours looks more like nodding spikes.
here are some pics of different varieties of amaranthus and useful links
http://www.saunalahti.fi/sjostrom/an...maranthus.html
http://www.odla.nu/artiklar/images/b...us-pony-ta.jpg
http://www.gardentrails.com/product/...1190&Enlarge=T
http://www.biol.s.u-tokyo.ac.jp/user..._amaranth.html
http://floriculture.osu.edu/archive/...rr-i/r0734.jpg
http://www.gardenerspath.com/plantguide/amaranthus.html
http://plants.usda.gov/classificatio...MARA|u|140|+63
http://caliban.mpiz-koeln.mpg.de/~st...2500/02299.jpg
http://caliban.mpiz-koeln.mpg.de/~st...2500/02301.jpg
http://caliban.mpiz-koeln.mpg.de/~st...6000/05584.jpg
http://theparttimegardener.com/amaranthus.jpg
http://solanaseeds.netfirms.com/amaranthe2.JPG
http://tomclothier.hort.net/album/elephead.htm
http://mtuxford.tripod.com/flowers/p...amaranthus.htm
Acalyphas belong to the family Euphorbiaceae, a common name would be chenille plant or red hot cattail and not 'love lies bleeding' aka Amaranthus which belongs to the family acanthaceae.
Here are a few pics of acalyphas:
http://www.kartuz.com/f/r/acalypha-hispida.jpg
http://www.gerbeaud.com/jardin/fiche...n_acalypha.jpg
http://www.magnolia.kujawy.com.pl/acalypha.htm
http://www.cambridge2000.com/gallery...P50811507.html
http://www.floridata.com/ref/A/acal_his.cfm
http://www.kwekerijgommer.com/fotos/...%20Hispida.JPG
http://www.uhu.es/51038/images/fotos...-hispida02.jpg
http://www.dentooms.com/wholesale/acalypha_firetail.htm
Laura :)