Holes on bottom of reed

[GeneraloftheSaxArmy]

So I noticed the other day...on my Vandorens, on the bottom of the reed (not the flat side, the skinny bottom) has little holes that disappear when it's wet, but return later.

Why is that?

[milandro]

well a reed is a grass , therefore a plant, and those " holes" are part of the " tubing" system which transports water and nutrients from the roots to the leaves, they close because the reed swells up when wet and dries out when dry.

[BlueTrane2028]

I think its more than that, IIRC (I'm not looking at a reed right now), there's four holes in the bottom of a reed... I think they are clamping marks from the machinery that cuts the reed.

[GeneraloftheSaxArmy]

Yeah, I think they're a machining thing because there's only 4, evenly spaced, and uniform on every reed.

I was wondering if they put those there on purpose.