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This is a discussion on Dendrobium thyrsiflorum (sib cross) within the Cattleyas, Vandas, Dendrobiums IN BLOOM forums, part of the Orchid Photography category; Originally Posted by zainal abidin Geoff your clone is from which country? as my flowers ...
I have done my homework on this - spurred on by you ! - and find that in the section Densiflora of Dendrobium genus there are generally accepted to be 3 different species here . D.densiflorum, D.farmeri, and D.thyrsiflorum. All the other possibilities, e.g. D.palpabrae, are just synonyms , or the plants are more distinct in other ways - e.g. griffithianum stems are very different, and so on.
D.farmeri is always shown as having flowers like mine, but the bulbs are four angled - square - at their upper parts.
D.thyrsiflorum is sometimes illustrated having flowers like mine ,e.g. in Wikipedia, and in some Australian sites - but this is no guarantee that it is right. It is also said to have club shaped bulbs, which I take to mean indian club, thin at the base, tapering outwardly to thicker, 2/3rds of the way up and then slimming down towards the top. My bulbs are not like that.
D.densiflorum is always - in the illustrations I have found, shown as having all yellow flowers, although sometimes two-toned yellow - darker lips ; it is also said to have multi-angled stems - a good description of my plant.
D.thyrsiflorum is sometimes called - or mixed up with ? D.densiflorum var.albolutea or var album.
I think that my plant probably is this last one - either the album or albo-lutea form of D.densiflorum.
Yours appears to be the real thing - D.thyrsiflorum.
I will send an e-mail to the supplier about this and see where I get to. I'll let you know.