Abstract
Verticillate proliferations are characteristic of the podetia in certain species of Cladonia section Cladonia that have been informally classified in the Cladonia cervicornis group. The proliferations form at the center of the closed scyphus and they usually give rise to further tiers of central proliferations. They are initially formed from meristematic tissue that persists in the upper layer of the scyphus, which becomes surrounded by nonmeristematic tissue dur- ing widening of the scyphus. Once the supporting scyphus attains a certain width, this meristematic tis- sue becomes active, producing a vertical prolifera- tion. The proliferation, which starts as an indistinct mass of fungal tissue, later becomes lichenized and differentiates into a characteristic podetial morphol- ogy that includes a stipe and scyphus. The vertical proliferation represents a new module of the pode- tium.
Published Version
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