The main culms of Cannomois virgata are long, stout and erect or arching, even drooping somewhat under the weight they carry at and near their tips. Flowering happens from mid-spring to midsummer. This plant was seen in the Gifberg in October.
Apart from the brown inflorescence the culms have needle-like tufts of long, green, sterile, secondary culms branching from the nodes under the sheaths.
The clump formed by a mature plant may be up to 6 m in diameter at its base.
The entire Cannomois genus of about seven species is endemic to the Western and Eastern Cape (Dorrat-Haaksma and Linder, 2000; Bond and Goldblatt, 1984; iNaturalist; http://pza.sanbi.org).