In a cespitose manner; in the way that cespitose plants grow or are arranged in tufts.
From cespitose plus the adverbial suffix -ly, creating an adverb that describes the manner or style of something exhibiting cespitose characteristics.
This is an ultra-specialized botanical term that describes not just what plants look like, but how they're doing it—kind of like the difference between 'organized' and 'organizedly,' but for plant nerds!
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