Huperzia tetrasticha seems to like drier conditions than most of these epiphytic lycopodium. Stems will rot if kept wet. When well grown, it can be a splendid specimen. Huperzia tetrasticha is called the Square-stemmed lycopodium, and the fronds are definitely square.
Huperzia tetrasticha has done well for me in tree fern baskets. This may be because Huperzia tetrasticha seems to need air at the roots.
Although relatively slow growing, Huperzia tetrasticha can eventually form a bushy specimen, with fronds a couple of feet long.