Now almost all my complex are in low sheath. Yay!!!
The ones that I posted above, they are growing buds inside the sheath.
---------- Post added at 03:13 PM ---------- Previous post was at 03:00 PM ----------
I thought my Lebaudyanum was in spike/sheath but they now just look like leaves. Is there a rather obvious difference between leaves and sheaths? (i think I know the answer to this since mine look mostly like leaves...wishful thinking I guess...).
Well, it's rather easy and quite clear.
You need to first observe a few plants when they spike and notice how different they look as compared to a newly emerging leaf.
Maudiae types (like a bunch of vini flowers you have blooming) and parvisepalum & brachpetalums will usually have hairy spike. Now, a spike may or may not have sheath or fake leaf ( I don't know the technical term, but usually there might be this tiny leaf before a spike emerge, although it's not always the case).
Whether there will be this sheath or not, both the sheath and flower bud "cover" (again, I don't know the proper name of this structure, but this is that part which envelops the bottom of the ovary) will have hairs and once you get used to seeing them, it's quite clear as newly emerging leaves have no hairs, and they look quite different as well.
Another thing, once there is a spike coming, you look at the bottom of the growth (or fan) from the side, and you can see the bulging as the plant is holding the developing spike there. sort of like being pregnant with belly sticking out.
With complex hybrids, there will be no hairs in general, but the appearance is quite different from leaves. It's hard to describe but easy to see in person.
Also, leaves will have this split tip while spikes do not.
This feature applies to all other paph groups I think.
Also, as the new leaf grows out, it will open up even when it's way down at the center of the growth while sheath will stay closed until there's bud coming out.
Spotted or red colored complex will often have sheath that are also spotted or marked dark near the tip or all over the sheath, so these are very easy to tell early one.
You just look for something dark deep down the growth and you know it's a sheath.
Multiflorals usually have nearly black spikes, so it is very easy to tell.