The Collaborative International Dictionary of English v.0.48:
Halm \Halm\ (h[add]m), n. (Bot.) Same as Haulm. [1913 Webster]WordNet (r) 3.0 (2006):
halm n 1: stems of beans and peas and potatoes and grasses collectively as used for thatching and bedding [syn: haulm, halm]