HOLCUS, in botany, a genus of the polygamia monœcia class. The calix of the hermaphrodite is a double-flowered glume; the corolla is a glume with an awn; and there are three stamina, two styli, and one seed. The calix of the male is a double valved glume; it has no corolla, but three stamina. There are ten species, only two of them natives of Britain, viz. the lanatus, or meadow soft-grass; and the mollis, or creeping soft-grass.