Tribulocarpus

Low shrublets. Leaves alternate; stipules 0. Inflorescence bracteolate, in terminal dense groups. Flowers bisexual or sometimes lateral ones male. Perianth 5-parted, connate for +/- half its length; tube very short in male flowers. Stamens many, arising from mouth of perianth. Ovary inferior, of 2 fused carpels, 2-locular, with solitary, pendulous ovule per locule; style 1; stigmas 2. Fruit compound, fused to spinous bracts, spiny, stalked.