Monotypic genus. Gestalt distinctive when compared to photos. Most easily distinguished from Eriophyllum spp. by: phyllaries in 2 equal series (not just 1 series).
From genus in CA: erect shrub (not climbing or prostrate); twigs +- green (not bright- to yellow-green in youth, ie not E. viridis); lvs 2 per node, bases persistent, swollen.