Friday 26 June 2009

More on orchids

It has been suggested that really robust specimens like this one are showing 'hybrid vigour'. Since I consider them all to be hybrids, I rather think their environment might just have something to do with it instead.


The next sequence shows the gently graded colour variation from lilac to white:


That last one with no colouration whatsoever and yellow pollinia is known as Dactylorhiza fuchsii, ssp. o'kellyi, and is confined to western Ireland. No comment.


I raced to have a close look at these two when I saw them, and sure enough, the spike is short and the lower lobes are really frilly. A perfect Heath Spotted Orchid?

Not in my book...they just happened to be the only two with their feet submerged in the stream, and were less than a metre away from identically-coloured CSO with dry feet.

Still with orchids in mind, have a look at this shot of the hoverfly Helophilus pendulus:

Notice anything?

The hoverfly has some green objects stuck to its antennae. A much closer zoom in shows that they are, in fact, the pollinia of an orchid:

They must be quite irritating to the hoverfly, because it was quite clearly trying to remove them. Maybe hoverflies aren't perfectly built for this pollination task.

2 comments:

Gill said...

"ssp. o'kellyi, and is confined to western Ireland." so what's it called when I find it in Yorkshire then?

Nice page (and you have to sympathise with that hoverfly - it must be lie having sellotape stuck to your fingers!

Stuart said...

"so what's it called when I find it in Yorkshire then?"

"White CSO hybrid". Same as here.

Stace: "not worthy of ssp status."