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culm (KUHLM) - n., the above-ground stem of a grass, sedge, or similar plant.
There's another word spelled culm, meaning waste i.e. low-quality coal, but the culm I came across and put in my queue was this one. Reeds, canes, and bamboo all have culms, and both hay and straw are primarily culms. Taken in the 1650s as a technical botanical term from Latin culmus, stem/stalk of any kind of plant (as well as hay or straw), from Greek kálamos, reed. The red culms of sugar cane:

Thanks, WikiMedia!
---L.
There's another word spelled culm, meaning waste i.e. low-quality coal, but the culm I came across and put in my queue was this one. Reeds, canes, and bamboo all have culms, and both hay and straw are primarily culms. Taken in the 1650s as a technical botanical term from Latin culmus, stem/stalk of any kind of plant (as well as hay or straw), from Greek kálamos, reed. The red culms of sugar cane:
Thanks, WikiMedia!
---L.