ON THE COVER: Durvillaea bull‐kelp is a keystone genus in shallow waters of the Southern Hemisphere. In New Zealand, up to three Durvillaea species can grow sympatrically. Here, on a steep rock face at Second Beach in Otago, D. poha (with wider, paler blades and shorter, stouter stipes) grows a little above D. antarctica in the intertidal, and D. willana (not visible) grows subtidally. Molecular and morphological analyses have led to the description of several new species in the genus in recent years, summarized in a revision in this issue. (Photo Credit: Ceridwen Fraser)

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封面：杜氏海藻是南半球浅水区的基石属。在新西兰，最多可以有三种杜鹃科植物同胞生长。在这里，在奥塔哥（Otago）第二海滩的陡峭岩壁上，潮间带D. poha（具有较宽，较浅的叶片，短而陡峭的针刺）生长在南极洲际间的D.南极洲上方，而D. willana（不可见）则隐蔽地生长。分子和形态分析已导致近年来对该属中几个新物种的描述，并在本期修订中进行了概述。（照片来源：Ceridwen Fraser）