Crassula vaillantii may form dense and extensive mats on bare ground. The plants tend to root at stem nodes. The briefly erect or spreading branches may start off green, becoming seasonally purple-red or remain red. The soft, fleshy stems are hairless (Smith, et al, 2017; Bond and Goldblatt, 1984; iNaturalist; https://savvastryfonosplants.com).