A promycelium is formed that consists of a short hypha (equated to a basidium). Clamp connections are formed by the terminal hypha during elongation. Basidiospores germinate on seedlings, and each hypha undergoes plasmogamy with a compatible hypha. In mycology, a stolon is defined as an occasionally septate hypha, which connects sporangiophores together. Not all of these asexual structures are a single hypha. Like in "C. albicans," double rings reflect polarity of the hypha. The attached hypha can be blocked from the pore by this thickening. For details on the sexual characteristics of fungi, see&colon; Hypha and Plasmogamy. A hypha consists of one or more cells surrounded by a tubular cell wall.