Branch primordia development

The development of the thallus verticalis in Stereocaulon (Fig. 80) and Pilophorus (Fig. 81) is different. A part of a squamule of the thallus horizon-talis or a complete granule of the thallus grows vertically upwards and develops into a simple or branched more or less erect thallus verticalis. The primordium of the fruiting body is formed only at the top of this stalk. The generative tissue builds only the ascocarp while the thallus verticalis is differentiated from vegetative thallus tissue. This kind of stipe is called a pseudopodetium. 

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