A new species of Eriotheca (Malvaceae, Bombacoideae) from coastal areas in the northeastern Brazilian states of Alagoas and Bahia is described and illustrated. Eriotheca alversonii inhabits Atlantic coastal forest and is found principally on sandy soils in restinga vegetation. It is most similar morphologically to E. parvifolia. Both species have 3-foliolate leaves and short petioles on fertile branches, but the new species has smaller flowers, truncate to crenulate calyces, and smaller globose to subglobose capsules. The affinities of E. alversonii to morphologically similar species and its phenology are discussed. A distribution map and preliminary assessment of its conservation status are provided.

中文翻译：

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巴西东北部沿海地区绒毛藻一新种（锦葵科、蜂花科）

描述和说明了来自巴西东北部阿拉戈斯州和巴伊亚州沿海地区的毛毛藻属（锦葵科、Bombacoideae）新种。Eriotheca alversonii 栖息于大西洋沿岸森林，主要发现于沙质土壤中的restinga 植被中。它在形态上与 E. parvifolia 最为相似。这两个物种在肥沃的枝条上都有 3 小叶的叶子和短的叶柄，但新物种的花较小，花萼截短至圆孔状，蒴果较小球状至近球状。讨论了 E. alversonii 对形态相似物种的亲和力及其物候。提供了分布图和对其保护状况的初步评估。