Annual undershrub, subglabrous, foetid, few feet high. "Baliospermum montanum" is a stout undershrub with numerous flowers. Salvia macrophylla is a perennial undershrub native to Colombia, Peru, and Bolivia. Pilea grandifolia is an undershrub native only to Jamaica. Undershrub, with mucilaginous juice, aerial, erect, cylindrical, branched, solid, green. Haloxylon salicornicum is a shrub or undershrub belonging to the family Amaranthaceae. "Gomphocarpus physocarpus" is an undershrub perennial herb, that can grow to over six feet.