Lippia includes 150–200 species mainly distributed in South America. Based on field surveys, analysis of nomenclatural types and other specimens, as well as the relevant literature, we found an interesting new species belonging to L. sect. Dioicolippia, which is here described and illustrated. Lippia crucifera inhabits Campos de Areia (sandy grasslands) of the Pampa biome in southwestern Rio Grande do Sul State, Brazil. It is characterized mainly by its small habit, 1–2 fertile nodes, hirsute leaves covered by longer trichomes 1.8–2.6 mm long, lack of glandular trichomes, and congested inflorescence borne on relatively short peduncles 2–10 mm long. Data regarding its geographic distribution, phenology, habitat, conservation, morphological affinities with similar species, and a key to distinguish the new species from its allies are provided.

Lippia包括 150-200 种，主要分布在南美洲。通过实地调查、命名类型及其他标本分析以及相关文献资料，我们发现了一个有趣的L. sect新种。Dioicolippia，这里描述和说明。十字花科植物栖息于巴西南里奥格兰德州西南部潘帕生物群落的 Campos de Areia（沙质草原）。它的主要特征是它的小习性，1-2个可育节，多毛的叶子被1.8-2.6毫米长的较长毛状体覆盖，没有腺毛，并且在2-10毫米长的相对较短的花序梗上长出密集的花序。提供了有关其地理分布、物候、栖息地、保护、与相似物种的形态亲缘关系的数据，以及区分新物种与其盟友的关键。